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DT9818 User`s Manual

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1. TB10 TB8 TB6 TB4 TB2 D 29 TD et 54 gt 47 D 40 63 27 20 D 13 6 30 60 53 46 39 64 qD 26 ap 19 D D 5 aD 31 59 52 45 38 65 dp 25 ID 18 Meno 4 OD 92 QD se dq Qe D s 66 TT 24 q 17 D 10 D 3 AN 33 57 dp 50 43 GND CD 67 23 16 9 2 Das D se ess De D 35 TD es 22 15 8 D 1 62 qD 55 qD 48 41 Decano 28 TD 21 qD 14 D 7 Deenn D TB7 Figure 37 EP355 Screw Terminal Blocks TB5 TB3 139 Appendix B EP355 Screw Terminal Assignments when Attached to Connector J2 on the Module Table 39 lists the screw terminal assignments when the EP355 panel is attached to connector J2 o f the DT9818 OEM or DT9818 32 OEM module Table 39 Screw Terminal Assignments on the EP355 Screw Terminal Panel When Attached to Connector J2 Screw Terminal Signal Screw Terminal Terminal Block Description Terminal Block Signal Description 1 TB1 5 V Analog 2 TB1 Amplifier Low 3 TB1 Analog Ground 4 TB2 Analog Input 15 DI Analog Input 23 SE 5 TB2 Analog Ground 6 TB2 Analog Input 14 DI Analog Input 22 SE 7 TB3 Analog Ground 8 TB3 Analog Input 13 DI Analog Input 21 SE 9 TB3 Analog Ground 10 TB3 Analog Input 12 DI
2. Screw Terminal Signal Screw Terminal Signal Terminal Block Description Terminal Block Description 1 TB1 Reserved 2 TB1 5V_User 3 TB1 Reserved 4 TB2 Reserved 5 TB2 Reserved 6 TB2 Reserved 7 TB3 C T1 Out 8 TB3 C T1 Clk In 9 TB3 C TO Out 10 TB3 C TO Clk In 11 GND Digital Ground 12 TB4 Reserved 13 TB4 Reserved 14 TB5 Reserved 15 TB5 Reserved 16 TB5 Reserved 17 TB5 Reserved 18 TB6 Reserved 19 TB6 Reserved 20 TB6 Digital In 7 21 TB7 Digital In 6 22 TB7 Digital In 5 23 TB7 Digital In 4 24 TB7 Digital In 3 25 TB8 Digital In 2 26 TB8 Digital In 1 27 TB8 Digital In 0 28 TB9 External ADC Clock 29 TB10 External DAC 30 TB10 Digital Ground Clock 31 TB10 Reserved 32 TB9 Reserved 33 TB9 Analog Out 1 34 TB9 Analog Out 0 35 TB1 Reserved 36 GND Digital Ground 37 TB1 Reserved 38 TB2 Digital Ground 39 TB2 Reserved 40 TB2 Digital Ground 41 TB3 C T1 Gate 42 TB3 Digital Ground 43 TB3 C TO Gate 44 TB3 Digital Ground 45 TB4 Reserved 46 TB4 Reserved 47 TB4 Reserved 48 TB5 Reserved 49 TB5 Reserved 50 TB5 Reserved 142 Connector Pin Assignments Table 40 Screw Terminal Assignments on the EP355 Screw Terminal Panel When Attached to Connector J3 cont Screw Terminal Signal Screw Terminal Signal Terminal Block Description Terminal Block Description 51 TB5 Reserved 52 TB6 Reserved 53 TB6 Reserved 54 TB6 Digital Out 7
3. Screw Terminal Signal Description 20 Reserved 19 Reserved 18 Reserved 17 Digital Ground 16 Reserved 15 Reserved 14 Reserved 13 Digital Ground 12 Reserved 11 Reserved 10 Reserved 9 Digital Ground 8 Counter 1 Gate 7 Counter 1 Out 6 Counter 1 Clock 5 Digital Ground 4 Counter 0 Gate 3 Counter 0 Out 2 Counter 0 Clock 1 Digital Ground 162 A A D Over Sample error 77 A D subsystem specifications 118 accessories 19 accessory panel EP353 19 34 136 EP355 19 35 139 EP356 19 36 144 STP37 19 aliasing 72 analog input calibrating 114 channels 65 continuous operations 72 conversion modes 72 data format and transfer 76 differential configuration 66 151 differential inputs 37 error conditions 77 gain 71 pseudo differential inputs 37 66 150 ranges 71 reading counter timers through the input channel gain list 69 reading the digital input port through the channel gain list 68 resolution 65 sample clock sources 72 single ended inputs 37 65 150 single value operations 72 specifying an input channel gain list 67 testing continuous operations 56 testing single value operations 54 triggers 76 wiring current loop inputs 41 wiring differential inputs 38 wiring pseudo differential inputs 38 wiring single ended inputs 37 Analog Input connector pin assignments 152 analog output calibrating 116 channels 78 clock sources 80 continuous operations 80
4. Analog Ground He Make this connection as close to V y sources as possible to reduce ground loop errors Vem is the common mode voltage for all 16 analog inputs Figure 9 Connecting Pseudo Differential Voltage Inputs Shown for Channels 0 1 and 8 to the DT9818 OEM or DT9818 32 OEM Module Note If you are using pseudo differential inputs set up the software so that bias return resistance is not used For more information refer to page 29 Connecting Differential Voltage Inputs Figure 10A illustrates how to connect a floating signal source to a DT9818 OEM or DT9818 32 OEM module using differential inputs A floating signal source is a voltage source that has no connection with earth ground Note For floating signal sources we recommend that you provide a bias return path for the differential channels by adding 10 kQ of termination resistance from the low side of the channel to isolated analog ground For more information on configuring termination resistance refer to page 29 38 Wiring Signals Figure 10B illustrates how to connect a nonfloating signal source to a DT9818 OEM or DT9818 32 OEM module using differential inputs In this case the signal source itself provides the bias return path therefore you do not need to provide bias return resistance through software R is the signal source resistance while R is the resistance required to balance the bridge Note that the negative side of t
5. 54 Testing Single Value Analog Input To verify that the module can read a single analog input value do the following 1 NS m 9 Connect a voltage source such as a function generator to analog input channel 0 differential mode on the DT9818 module Refer to page 38 for an example of how to connect a differential analog input In the Quick DataAcq application choose Single Analog Input from the Acquisition menu Select the DT9818 module from the Board list box In the Channel list box select analog input channel 0 In the Range list box select the range for the channel The default is 10 V Select Differential Click Get to acquire a single value from analog input channel 0 The application displays the value on the screen in both text and graphical form Verifying the Operation of a Module Testing Single Value Analog Output To verify that the module can output a single analog output value do the following 1 DSL Qv gr ee gm Connect an oscilloscope or voltmeter to analog output channel 0 on the module Refer to page 42 for an example of how to connect analog output signals In the Quick DataAcq application choose Single Analog Output from the Control menu Select the DT9818 module from the Board list box In the Channel list box select analog output channel 0 In the Range list box select the output range of DACO The default is 10 V Enter an output value or use the slider to select a valu
6. Read all the documentation provided for your product Make sure that you have added any Read This First information to your manual and that you have used this information Check the Data Acquisition OMNI CD for any README files and ensure that you have used the latest installation and configuration information available Check that your system meets the requirements stated in the README file on the OMNI CD Check that you have installed your hardware properly using the instructions in Chapter 2 Check that you have configured the device driver properly using the instructions on page 29 Check that you have wired your signals properly using the instructions in Chapter 3 Search the DT Knowledgebase in the Support section of the Data Translation web site at www datatranslation com for an answer to your problem If you still experience problems try using the information in Table 23 to isolate and solve the problem If you cannot identify the problem refer to page 106 Table 23 Troubleshooting Problems Symptom Possible Cause Possible Solution Module is not You plugged the module into your From the Control Panel gt System gt Hardware gt recognized computer before installing the Device Manager uninstall any unknown devices device driver showing a yellow question mark Then run the setup program on your OMNI CD to install the USB device drivers and reconnect your USB module to the computer Module
7. Screw Terminal Block TB5 Table 50 lists the screw terminal assignments for screw terminal block TB5 on the DT9818 32 STP Table 50 Screw Terminal Assignments for Terminal Block TB5 Screw Terminal Signal Description 18 Digital Ground 17 Reserved 16 Reserved 15 Reserved 14 Reserved 13 Reserved 12 Reserved 11 Reserved 10 Reserved 9 Digital Ground 8 Digital Input 7 7 Digital Input 6 6 Digital Input 5 5 Digital Input 4 4 Digital Input 3 3 Digital Input 2 2 Digital Input 1 1 Digital Input O 160 BNC and STP Box Connections Screw Terminal Block TB6 Table 51 lists the screw terminal assignments for screw terminal block TB6 on the DT9818 32 STP Table 51 Screw Terminal Assignments for Terminal Block TB6 Screw Terminal Signal Description 20 Digital Ground 19 Reserved 18 Digital Ground 17 Reserved 16 Reserved 15 Reserved 14 Reserved 13 Reserved 12 Reserved 11 Reserved 10 Reserved 9 Digital Ground 8 Digital Output 7 7 Digital Output 6 6 Digital Output 5 5 Digital Output 4 4 Digital Output 3 3 Digital Output 2 2 Digital Output 1 1 Digital Output 0 161 Appendix C Screw Terminal Block TB7 Table 52 lists the screw terminal assignments for screw terminal block TB7 on the DT9818 32 STP Table 52 Screw Terminal Assignments for Terminal Block TB7
8. DATA TRANSLATION UM 23015 E DT9818 User s Manual Fifth Edition April 2010 Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 508 481 3700 www datatranslation com Fax 508 481 8620 E mail info datx com Copyright 2008 2010 by Data Translation Inc All rights reserved Information furnished by Data Translation Inc is believed to be accurate and reliable however no responsibility is assumed by Data Translation Inc for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent rights of Data Translation Inc Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer software clause at 48 C ER 252 227 7013 or in subparagraph c 2 of the Commercial Computer Software Registered Rights clause at 48 C F R 52 227 19 as applicable Data Translation Inc 100 Locke Drive Marlboro MA 01752 Data Translation is a registered trademark of Data Translation Inc DT Open Layers DT Open Layers for NET Class Library DataAcq SDK Data Acquisition OMNI CD LV Link and DTx EZ are trademarks of Data Translation Inc All other brand and product names are trademarks or registered trademarks of their respective companies Radio and Television Interfe
9. In the Trigger box select Auto to acquire data continuously from the specified channels or Manual to acquire a burst of data from the specified channels Click Start from the Toolbar to start the continuous analog input operation The application displays the values acquired from each channel in a unique color on the oscilloscope view Click Stop from the Toolbar to stop the operation Verifying the Operation of a Module Testing Single Value Digital Input To verify that the module can read a single digital input value do the following 1 Connect a digital input to digital input line 0 on the DT9818 module Refer to page 43 for an example of how to connect a digital input 2 In the Quick DataAcq application choose Digital Input from the Acquisition menu 3 Select the DT9818 module from the Board list box 4 Click Get The application displays the entire 16 bit digital input value 0 to FFFF in both the Data box and the Digital Input box In addition the application shows the state of the lower eight digital input lines lines 0 to 7 in the graphical display If an indicator light is lit red the line is high if an indicator light is not lit black the line is low 57 Chapter 4 58 Testing Single Value Digital Output To verify that the module can output a single digital output value do the following 1 Connect a digital output to digital output line 0 on the DT9818 module Refer to page 43 for an
10. Specifying a Single Analog Output Channel The simplest way to output data from a single DAC is to specify the channel for a single value analog output operation using software refer to page 80 for more information about single value operations You can also specify a single DAC using the output channel gain list described in the next section Specifying Multiple Analog Output Channels and or the Digital Output Port You can output data from one or more DACs and or the digital output port using an output channel gain list This feature is particularly useful when you want to correlate the timing of analog and digital output events 78 Principles of Operation Using software specify the data flow mode as continuous for the D A subsystem described on page 80 and specify the output channels that you want to update where 0 is DACO 1 is DACI and 2 is the digital output port The gain is always 1 for output operations You can enter a maximum of 3 entries in the output channel gain list and the channels must be in order Note that you can skip a channel in the list however if you do not want to update it For example if you want to update only DACO and the digital output port specify channels 0 and 2 in the output channel gain list If you want to update both DACs and the digital output port specify channels 0 1 and 2 in the output channel gain list Table 8 shows an example of specifying channels in an output channel gain
11. www usb org Where To Get Help Should you run into problems installing or using a DT9818 module the Data Translation Technical Support Department is available to provide technical assistance Refer to Chapter 7 starting on page 105 for more information If you are outside the United States or Canada call your local distributor whose number is listed on our web site www datatranslation com 13 About this Manual 14 Overview DT9818 Hardware Features oo ccc cee ect ee eee be a Ee wale 16 APPO SOLVE a E RERES een eee e to rp 18 JAUGISOIIBS ods add Dai REL da tended AA wed oe EC EMEN GT E TAE TERES 19 20 Getting Started Procedure 15 Chapter 1 16 DT9818 Hardware Features The DT9818 is a high performance multifunction data acquisition module for the USB Ver 2 0 or Ver 1 1 bus The key hardware features of the DT9818 module are as follows Available in different form factors as shown in Table 1 The standard version of the module is provided as a board level OEM version that you can install in your own custom application Optionally the module is available in metal BNC or screw terminal STP connection box Table 1 Summary of DT9818 Modules Module Analog Inputs Packaging DT9818 OEM 16 single ended or 8 differential board level version DT9818 32 OEM 32 single ended or 16 differential board level version DT9818 16SE BNC 16 single ended BNC box DT9818 8DI BNC 8 differ
12. In waveform mode each channel in the output channel gain list must write the same number of values use the same output clock refer to page 80 and use the same output trigger refer to page 80 Figure 29 shows the timing diagram for a waveform generation operations Principles of Operation The channels in the output channel gain list are updated simultaneously with the values from specific locations in the output buffer The waveform is output continuously Trigger Sample Clock DAC 0 DK 0 3 lt 6 X 0 3 6 0 DAC 1 XT 1 4 wc T i 4 xw T 1 Digital KC 5 8 2 5 8 X 2 Output L Port Output Buffer Locations Figure 29 Timing Diagram for a Waveform Generation Operation You can allocate a buffer of any size Use software to fill the buffer with the values that you want to write to the channels in the output channel gain list For example if your output channel gain list contains only DACO and the digital output port specify the values in the output buffer as follows the first output value for DACO the first output value for the digital output port the second output value for DACO the second output value for the digital output port and so on When it detects a trigger the host computer transfers the entire waveform pattern to the FIFO on the module and the module starts writing output values to the output channels at the specif
13. Inherent quantizing error Ye LSB Drift Zero 10 uV C Gain 30 ppm of FSR C Differential linearity 2 ppm C Input impedance Off channel On channel 100 MQ 10 pF 100 MQ 100 pF Input bias current 20 nA Common mode voltage Signal common mode voltage 11 V maximum Common mode rejection ratio 80 dB gain 1 1 KQ Maximum input voltage without damage Power on Power off 30 V 20 V Specifications Table 24 A D Subsystem Specifications cont Feature Specifications A D conversion time 4 0 us Channel acquisition time 12 LSB 2 us typical Sample and hold Aperture uncertainty 0 2 ns typical Aperture delay 50 ns typical Throughput Single channel Multiple channel 150 kSamples s 150 kSamples s divided by the number of channels ESD protection Arc 8 kV Contact 4 kV Reference 2 5 V 0 020 V internal Monotonicity Effective Number of Bits ENOB at full scale 1 LSB Monotonic 14 1 bits typical at 1 kHz Spurious Free Dynamic Range SFDR 100 dB typical 119 Appendix A 120 Analog Output Specifications Table 25 lists the specifications for the D A subsystem on the DT9818 module Table 25 D A Subsystem Specifications Feature Specifications Number of analog output channels 2 Number of elements 2 Resolution 16 bits Data encoding Offset binary N
14. Source s Analog In 0 68 67 N Return x i Signal Source Analog Ground Ground Vg We recommend that you software select 10 kQ of resistance to connect the low side of channel 0 to analog ground a physical resistor is not required Refer to page 29 for more information Figure 11 Connecting Differential Voltage Inputs from a Grounded Signal Source Shown for Channel 0 to a DT9818 OEM or DT9818 32 OEM Module Wiring Signals Connecting Current Loop Inputs Figure 12 shows how to connect a current loop input channel 0 in this case to a DT9818 OEM or DT9818 32 OEM module DT9818 OEM or Vcc DT9818 32 OEM J2 Connector 8 4to 20 mA 34 cle Analog Input 0 0000o User installed UE poooooc resistor 68 67 Analog Input 0 Return Analog Ground The user installed resistor connects the high side of the channel to the low side of the corresponding channel thereby acting as a shunt If for example you add a 250 Q resistor and then connect a 4 to 20 mA current loop input to channel 0 the input range is converted to 1 to 5 V We recommend that you software select 10 kQ of resistance to connect the low side of channel 0 to analog ground a physical resistor is not required Refer to page 29 for more information Figure 12 Connecting Current Inputs Shown for Channel 0 to a DT9818 OEM or DT9818 32 OEM Module Note If you are using current loop inputs set up the software so that
15. Use connector J2 on the EP356 accessory panel to attach analog output counter timer trigger and clock signals You can access the pins on connector J1 or J2 either by using the EP333 cable and STP37 screw terminal panel available from Data Translation or by building your own cable panel Refer to page 144 for connector pin assignments on the EP356 panel 36 Wiring Signals Connecting Analog Input Signals You can connect analog input signals to a DT9818 OEM or DT9818 32 OEM module in the following configurations Single ended Choose this configuration when you want to measure high level signals noise is not significant the source of the input is close to the module and all the input signals are referred to the same common ground Pseudo Differential Choose this configuration when noise or common mode voltage the difference between the ground potentials of the signal source and the ground of the module or between the grounds of other signals exists and the differential configuration is not suitable for your application This option provides less noise rejection than the differential configuration however all analog input channels are available on the module e Differential Choose this configuration when you want to measure low level signals less than 1 V you are using an A D converter with high resolution greater than 12 bits noise is a significant part of the signal or common mode voltage exists This
16. channel gain list refer to Table 5 on page 69 You can enter a channel number anywhere in the list and you can enter it more than once if desired You need two channel gain list entries to read one 32 bit counter value The first entry stores the lower 16 bit word and the second entry stores the upper 16 bit word If you need only the lower 16 bit word you do not have to include the second entry The entire 32 bit count value is latched when the lower 16 bit word is stored This prevents the counter timer value that is being read from changing between samples Table 5 lists the channel number s to use for each counter timer Table 5 Using Counter Timers in the Input Channel Gain List Channel to Specify in Channel to Specify Counter Timer the Channel Gain List in Channel Gain List Channel Description for the DT9818 32 OEM for all Other Modules C T_O_LOW Lower 16 bits 0 to 15 of C TO Channel 33 Channel 17 C T 0 HI Upper 16 bits 16 to 31 of C TO Channel 34 Channel 18 C T 1 LOW Lower 16 bits 0 to 15 of C T1 Channel 35 Channel 19 C T 1 HI Upper 16 bits 16 to 31 of C T1 Channel 36 Channel 20 Note To read the entire 32 bit value specify the channel corresponding to the lower 16 bit word first followed by the channel corresponding to the upper 16 bit word While you can read the lower 16 bit word of a 32 bit counter you cannot read just the upper 16 bit word Table 6 shows an e
17. digital I O 85 number of 99 clock sources analog input 72 analog output 80 counter timer 88 clock falling edge type 103 clock rising edge type 103 clocks base frequency 102 external 102 internal 102 maximum external clock divider 102 maximum throughput 102 minimum external clock divider 102 minimum throughput 102 simultaneous 102 specifications 124 125 configuring the device driver 29 connecting signals analog outputs 42 151 continuous edge to edge measurement 48 current loop analog inputs 41 differential analog inputs 38 151 digital inputs and outputs 43 edge to edge measurement 47 event counting applications 44 45 frequency measurement applications 46 period measurement 46 pseudo differential analog inputs 38 150 pulse output applications 49 pulse width measurement 46 single ended analog inputs 37 150 up down counting 45 connecting to the host computer 26 using an expansion hub 27 connector pin assignments DT9818 32 OEM 131 DT9818 OEM 131 EP353 136 EP356 144 connectors J1 on DT9818 OEM and DT9818 32 OEM 131 J1 on EP353 136 J1 on EP356 144 J2 on DT9818 OEM and DT9818 32 OEM 132 J2 on EP353 137 J2 on EP356 145 J3 on DT9818 OEM and DT9818 32 OEM 134 continuous analog input externally retriggered scan mode 75 post trigger 97 scan operations 73 software retriggered scan mode 74 continuous analog output 97 continuously paced 81 waveform generation mode 82 continuous counter timer 97 continuous digital I O 86 97
18. 1 8 AIN1 Read analog input channel 1 using a gain of 8 input range of 1 25 V The counter timer channel is treated like any other channel in the input channel gain list therefore all the clocking triggering and conversion modes supported for analog input channels are supported for the counter timers if you specify them this way 70 Principles of Operation The maximum rate at which the module can read the channels in the input channel gain list depends on the total number of channels in list See page 67 for information on specifying analog input channels and to page 68 for specifying the digital input port in the input channel gain list For example since the maximum throughput of the analog input subsystem is 150 kSamples s the module can read one analog input channel and one counter timer three channels total at a maximum sample rate per channel of 50 kSamples s To read three analog input channels and one counter timer five channels total the maximum sample rate per channel is 30 kSamples s Input Ranges and Gains Table 7 lists the supported gains and effective bipolar input ranges for each Table 7 Effective Input Range Gain Input Range 1 10V 2 5 V 4 2 5 V 8 1 25 V Using software specify a range of 40 V to 10 V Note that this is the range for the entire analog input subsystem not the range per channel For each channel choose the gain that
19. 126 regulatory 128 triggers 123 specifying a single channel analog input 66 analog output 78 specifying one or more channels analog input 67 digital I O 68 stopping an operation 72 82 STP connection box 155 STP37 screw terminal panel 19 SupportedGains 99 SupportedResolutions 100 SupportedVoltageRanges 100 SupportsBinaryEncoding 98 SupportsBuffering 98 SupportsChannelListInhibit 99 SupportsClockFalling 103 SupportsClockRising 103 SupportsContinuous 97 SupportsContinuousMeasure 103 SupportsCount 103 SupportsDCCoupling 101 SupportsDifferential 99 SupportsExternalClock 102 SupportsGateFalling 103 SupportsGateHighEdge 103 SupportsGateHighLevel 103 SupportsGateLowEdge 103 SupportsGateLowLevel 103 SupportsGateNone 103 SupportsGateRising 104 SupportsHighToLowPulse 103 SupportsInProcessFlush 98 SupportsInternalClock 102 SupportsInterrupt 104 SupportsLowToHighPulse 103 SupportsMeasure 103 SupportsNegExternalTTL Trigger 102 SupportsOneShot 103 SupportsOneShotRepeat 103 SupportsPosExternalTTL Trigger 102 SupportsProgrammableGain 99 SupportsRateGenerate 103 SupportsSimultaneousClocking 102 SupportsSimultaneousStart 97 SupportsSingleEnded 99 SupportsSingleValue 97 SupportsSoftwareTrigger 102 SupportsTriggeredScan 98 SupportsUpDown 103 SupportsVariablePulseWidth 103 SupportsWrapSingle 98 T technical support 108 throughput maximum 102 minimum 102 transferring data analog input 76 analog output 84 triggered scan 74 9
20. 33 pseudo differential inputs 37 66 pulse output one shot 93 rate generation 92 repetitive one shot 94 testing 60 types 89 wiring 49 pulse width 89 91 wiring 46 Q Quick DataAcq application 18 running 53 quickDAQ 18 R ranges analog input 71 analog output 79 number of 100 rate generation 92 103 recommendations for wiring 33 repetitive one shot pulse output 94 103 resolution analog input 65 analog output 78 available 100 number of 100 retrigger clock frequency 98 retriggered scan mode 74 75 returning boards to the factory 109 RMA 109 running the Quick DataAcq application 53 S sample clock sources 72 sample rate 73 75 scan mode externally retriggered 75 software retriggered 74 scan operations analog input 72 screw terminal assignments EP355 attached to connector J2 140 167 Index 168 attached to connector J3 142 screw terminal panel EP355 35 139 screw terminal panel STP37 19 SDK 18 service and support procedure 108 simultaneous clocking 102 simultaneous start list 97 single buffer wrap mode 98 single ended channels 37 65 99 number of 99 single value operations 97 analog input 72 analog output 80 digital I O 85 software packages 18 software trigger 76 80 102 software retriggered scan mode 74 specifications 117 analog input 118 analog output 120 clocks 124 125 counter timer specifications 122 digital I O 121 environmental 126 physical 126 power
21. 55 TB7 Digital Out 6 56 TB7 Digital Out 5 57 TB7 Digital Out 4 58 TB7 Digital Out 3 59 TB8 Digital Out 2 60 TB8 Digital Out 1 61 TB8 Digital Out 0 62 TB9 External ADC Trigger 63 TB10 External DAC 64 TB10 Digital Ground Trigger 65 TB10 Reserved 66 TB9 Reserved 67 TB9 Analog Out 1 68 TB9 Analog Out 0 Return Return 143 Appendix B EP356 Accessory Panel Pin Assignments This section describes the pin assignments for the connectors on the EP356 accessory panel Figure 38 shows the orientation of the pins for connectors J1 and J2 on the EP356 panel Pin 20 Pin 37 000000000000000000 000000000000000000 Pin 1 Pin 19 Figure 38 Orientation of the Pins for Connectors J1 and J2 of the EP356 Panel Connector J1 on the EP356 Panel Table 41 lists the pin assignments for connector J1 on the EP356 accessory panel Table 41 EP356 Connector J1 Pin Assignments Pin Signal Description Pin Signal Description 1 Digital In O 20 Digital Out O 2 Digital In 1 21 Digital Out 1 3 Digital In 2 22 Digital Out 2 4 Digital In 3 23 Digital Out 3 5 Digital In 4 24 Digital Out 4 6 Digital In 5 25 Digital Out 5 7 Digital In 6 26 Digital Out 6 8 Digital In 7 27 Digital Out 7 9 Reserved 28 Reserved 10 Reserved 29 Reserved 11 Reserved 30 Reserved 12 Reserved 31 Reserved 13 Reserved 32 Reserved 14 Reserved 33 Reserved 15 Reserved 34 Reserved 16 Reserved 35 Reserved 144
22. 98 data flow modes continuous C T 97 continuous digital input 97 continuous post trigger 97 single value 97 data format and transfer analog input 76 analog output 84 DataAcq SDK 18 device driver 18 differential channels 66 99 differential inputs 37 digital I O 85 lines 85 operation modes 85 specifying a digital input port in the input channel gain list 68 subsystem specifications 121 testing input operations 57 testing output operations 58 updating the digital output port through output channel gain list 78 wiring 43 Digital In Out connector pin assignments 153 digital input port 86 digital output port 86 digital trigger 76 80 DT9818 Device Driver 18 29 DT9818 32 OEM connector pin assignments 131 DT9818 OEM connector pin assignments 131 DT Open Layers for NET Class Library 18 DTx EZ 18 duty cycle 89 E edge type clock falling 103 clock rising 103 gate falling 103 gate rising 104 edge to edge measurement mode 91 103 wiring 47 encoding data 76 84 environmental specifications 126 EP333 cable 19 EP353 accessory panel 19 34 136 EP355 screw terminal panel 19 35 139 EP356 accessory panel 19 36 144 EP360 cable 19 errors analog input 77 analog output 84 over sample 77 84 overflow 77 underflow 84 event counting 44 90 103 external clock 88 102 external clock divider maximum 102 minimum 102 external digital trigger 76 80 negative 102 externally retriggered scan mode 75 F factory service 109 feature
23. Analog Input 20 SE 11 GND Analog Ground 12 TB4 Analog Input 11 DI Analog Input 19 SE 13 TB4 Analog Ground 14 TB5 Analog Input 10 DI Analog Input 18 SE 15 TB5 Analog Ground 16 TB5 Analog Input 9 DI Analog Input 17 SE 17 TB5 Analog Ground 18 TB6 Analog Input 8 DI Analog Input 16 SE 19 TB6 Analog Ground 20 TB6 Analog In 7 21 TB7 Analog Ground 22 TB7 Analog In 6 23 TB7 Analog Ground 24 TB7 Analog In 5 25 TB8 Analog Ground 26 TB8 Analog In 4 27 TB8 Analog Ground 28 TB9 Analog In 3 29 TB10 Analog Ground 30 TB10 Analog In 2 31 TB10 Analog Ground 32 TB9 Analog In 1 33 TB9 Analog Ground 34 TB9 Analog In 0 35 TB1 Digital Ground 36 GND Analog Ground 37 TB1 Analog Ground 38 TB2 Analog In 15 DI Return Analog In 31 SE 39 TB2 Analog Ground 40 TB2 Analog In 14 DI Return Analog In 30 SE 140 Connector Pin Assignments Table 39 Screw Terminal Assignments on the EP355 Screw Terminal Panel When Attached to Connector J2 cont Screw Terminal Signal Screw Terminal Terminal Block Description Terminal Block Signal Description 41 TB3 Analog Ground 42 TB3 Analog In 18 DI Return Analog In 29 SE 43 TB3 Analog Ground 44 TB3 Analog In 12 DI Return Analog In 28 SE 45 TB4 Analog Ground 46 TB4 Analog In 11 DI Return Analog In 27 SE 47 TB4 Analog Ground 48 TB5 Analog In 10 DI Return Analog In 26 SE 49 TB5 Analog Ground 50 TB5 A
24. Connector Pin Assignments Table 41 EP356 Connector J1 Pin Assignments cont Connector J2 on the EP356 Panel Pin Signal Description Pin Signal Description 17 Digital Ground 36 Reserved 18 Digital Ground 37 Digital Ground 19 Chassis Ground Table 42 lists the pin assignments for connector J2 on the EP356 accessory panel Table 42 EP356 Connector J2 Pin Assignments Pin Signal Description Pin Signal Description 1 Analog Out 0 20 Analog Out 0 Return 2 Analog Out 1 21 Analog Out 1 Return 3 Reserved 22 Reserved 4 Reserved 23 Reserved 5 Digital Ground 24 Digital Ground 6 External DAC Clock 25 External DAC Trigger 7 External ADC Clock 26 External ADC Trigger 8 C TO Clk In 27 Digital Ground 9 C TO Out 28 C TO Gate 10 C T1 Clk In 29 Digital Ground 11 C T1 Out 30 C T1 Gate 12 Reserved 31 Digital Ground 13 Reserved 32 Reserved 14 Reserved 33 Digital Ground 15 Reserved 34 Reserved 16 5V_User 35 Digital Ground 17 Reserved 36 Reserved 18 Digital Ground 37 Digital Ground 19 Chassis Ground 145 Appendix B 146 BNC and STP Box Connections Wiring ta the BNC Connection BD ieoeceneseeek ensem nee ok eon lalla ec eats 148 Wiring to the STP Connection DOX ce aia DERI OR IH Che de ah n 155 147 Appendix C Wiring to the BNC Connection Box The BNC connection box contains both BNC connectors and 37 pi
25. DT9818 32 OEM modules The second signal description applies to the single ended configuration for the DT9818 OEM and DT9818 32 OEM modules Connector J2 on the EP353 Panel Figure 36 shows the orientation of the pins for connector J2 on the EP353 panel Pin 1 Pin 19 000000000000000000 000000000000000000 Pin 20 Pin 37 Figure 36 Orientation of the Pins for Connectors J2 on the EP353 Panel Table 38 lists the pin assignments for connector J2 on the EP353 accessory panel Table 38 EP353 Connector J2 Pin Assignments Pin Signal Description Pin Signal Description 1 Analog Input O 20 Analog Input O DI Return Analog In 8 SE 2 Analog Input 1 21 Analog Input 1 DI Return Analog In 9 SE 3 Analog Input 2 22 Analog Input 2 DI Return Analog In 10 SE 4 Analog Input 3 23 Analog Input 3 DI Return Analog In 11 SE 5 Analog Input 4 24 Analog Input 4 DI Return Analog In 12 SE 6 Analog Input 5 25 Analog Input 5 DI Return Analog In 13 SE 7 Analog Input 6 26 Analog Input 6 DI Return Analog In 14 SE 8 Analog Input 7 27 Analog Input 7 DI Return Analog In 15 SE 9 Analog Input 8 DI 28 Analog Input 8 DI Return Analog In 24 SEP Analog Input 16 SEP 137 Appendix B 138 Table 38 EP353 Connector J2 Pin Assignments cont Pin Signal Description Pin Signal Description 10 Analog Input 9 DI 29 Analog Input 9 DI Return Analog In 25 SE Analog In
26. Layers Control Panel applet Refer to page 29 for more information BNC Connection Box O Analog Input D Analog In 0 o e 1 gt 38 Os Os Os Signal lt lt lt Source Analog In 1 E a gt Os Olg 02 OZ lt lt lt lt Note that the BNC connection box automatically connects the Analog ON o o Ground and Amp Low signals together O 2 2 a O a using a 1 kQ resistor lt Figure 40 Connecting Single Ended Inputs to the BNC Connection Box Connecting Pseudo Differential Analog Inputs Figure 41 shows how to connect pseudo differential voltage inputs channels 0 and 1 in this case to the BNC connection box BNC Connection Box UD Analog Input D Analog In 0 ome is N OR OS OB Cla Signal lt lt lt Source Analog In 1 z a a a Ola Ola lt lt a Note that the BNC connection box a automatically connects the Analog a O a a O a Ground and Amp Low signals together lt lt using a 1 KQ resistor EN eo M 2 Ola Os Oz Og Figure 41 Connecting Pseudo Differential Inputs to the BNC Connection Box 150 BNC and STP Box Connections Connecting Differential Analog Inputs Figure 42 shows how to connect differential voltage inputs channels 0 and 1 in this case to the BNC connection box BNC Connecti
27. Reserved 4 Reserved 23 Reserved 5 Digital Ground 24 Digital Ground 6 External DAC Clock 25 External DAC Trigger 7 External ADC Clock 26 External ADC Trigger 8 C TO Clk In 27 Digital Ground 9 C TO Out 28 C TO Gate 10 C T1 Clk In 29 Digital Ground 11 C T1 Out 30 C T1 Gate 12 Reserved 31 Digital Ground 13 Reserved 32 Reserved 14 Reserved 33 Digital Ground 15 Reserved 34 Reserved 16 5V_User 35 Digital Ground 17 Reserved 36 Reserved 18 Digital Ground 37 Digital Ground 19 Chassis Ground when used with EP333 cable otherwise no connect 154 BNC and STP Box Connections Wiring to the STP Connection Box The STP connection box is provided for the 32 analog input channel version of the module only DT9818 32 STP It contains blocks of screw terminals that allow you to access all the signals of the module Figure 44 shows the layout of the STP connection box 20 20 18 18 18 0000000000000000 0000 w 0000000000000000 00 9g 0000000000000000 OO 3 0000000000000000 OO 9 DOO DOOD DOOD OOOO 0 OO 3 0000000000000000 OO w DOO DOOD DOOD OOOO 0 0000 T T E E E Ww o 4 Figure 44 STP Connection Box Refer to Chapter 3 starting on page 31 for wiring diagrams 155 Appendix C Screw Terminal Block TB1 Table 46 lists the screw terminal assignments for screw terminal block TB1 on the DT9818 32 STP Table 46 Screw Terminal Assignmen
28. To avoid this error close other applications that may be running while you are acquiring data If this has no effect try using a computer with a faster processor or reduce the sampling rate If one of these error conditions occurs the module stops acquiring and transferring data to the host computer 77 Chapter 5 Analog Output Features This section describes the following features of the analog output D A subsystem on the DT9818 module Output resolution described below Analog output channels described on below Outputranges and gains described on page 79 Output triggers described on page 80 Output clocks described on page 80 e Data format and transfer described on page 84 Error conditions described on page 84 Output Resolution The resolution of the analog output subsystem is fixed at 16 bits You cannot program the resolution of this subsystem in software Analog Output Channels The DT9818 module provides two streaming analog output channels DACO and DAC1 Refer to Chapter 3 starting on page 31 for information on how to wire analog output signals to the module You configure the channel type through software Within each DAC the digital data is double buffered to prevent spurious outputs then output as an analog signal Both DACs power up to a value of 0 V 10 mV Resetting the module does not clear the values in the DACs The following subsections describe how to specify an analog output channel
29. Value Analog Output lssssssssss ee 55 Testing Continuous Analog Input oooooococccocccco rr 56 Testing Single Value Digital Input sssssesseseeee e eee 57 Testing Single Value Digital Output sss 58 Testing Frequency Measurement sseeeeele n 59 Testing Pulse Output isi cess s uma s sige spiego S RS eee aes e Rap ne d 60 Part 2 Using Your Module oooooooooommmmmPm m m o 61 Chapter 5 Principles of Operation 00 cece eee eee eee eee 63 Analog Input Features reiese prn we ren reed Aqu eg besa eee res 65 Input Resolutions tenio sek ester Erst whan bra ees SEE ERE bes 65 Analog Input Channels ssssssesssess n 65 Specifying a Single Channel sssisrsssersarsrods sisa tito nais eee 66 Specifying One or More Channels 26 0c cece eens 67 Specifying Digital Input Lines in the Input Channel Gain List 68 Specifying Counter Timers in the Input Channel Gain List 69 Input Ranges and Gains rrote Ea aan nen nee 71 Input Sample Clock Sources rinasa i ee N A eens 72 Analog Input Conversion Modes 0 666 72 Continuous Scan Mode craes herr cece tenn he 73 Triggered Scan Mode c tege eee teet da a ee edd 74 Software Retriggered Scan Mode 00000 e eee eee eee 74 Externally Retriggered Scan Mode 0 000 e eee eee eee 75 Input Triggers 1e s vehe p ec Pan ect A E ai 76 Data Format and Transfer asias tada da dba
30. amp Registers Clocks OutputClock OutputClock amp ExtDACCIock ig p OutputCtriIClock OutputCtriClock Controls Reliance Clock ReferenceClock Figure 24 Block Diagram of the DT9818 Module 64 Principles of Operation Analog Input Features This section describes the following features of the analog input A D subsystem on the DT9818 module Input resolution described below e Analog input channels described on page 65 Input ranges and gains described on page 71 Input sample clock sources described on page 72 Analog input conversion modes described on page 72 Input triggers described on page 76 e Data format and transfer described on page 76 Error conditions described on page 77 Input Resolution The resolution of the analog input subsystem is fixed at 16 bits You cannot program the resolution in software Analog Input Channels Table 2 lists the number and type of analog input channels supported by the DT9818 module Table 2 Analog Input Channels Number of Single Ended Pseudo Differential Number of Differential Module Channels Channels DT9818 OEM 16 numbered 0 to 15 8 numbered 0 to 7 DT9818 32 OEM 32 numbered 0 to 31 16 numbered 0 to 15 DT9818 16SE BNC 16 numbered 0 to 15 DT9818 8DI BNC 8 numbered 0 to 7 You can use the analog input channels in one of the following configurations Single ended Single ended channels
31. bias return resistance is used For more information refer to page 29 41 Chapter 3 Connecting Analog Output Signals Figure 13 shows how to connect an analog output voltage signal channel 0 in this case to a DT9818 OEM or DT9818 32 OEM module DT9818 OEM or DT9818 32 OEM J3 Connector 34 Analog Output 0 DOOD OO Load 000000 68 Analog Output 0 Return Figure 13 Connecting Analog Output Voltages Shown for Channel 0 to a DT9818 OEM or DT9818 32 OEM Module 42 Wiring Signals Connecting Digital I O Signals Figure 14 shows how to connect digital input signals lines 0 and 1 Port A in this case to a DT9818 OEM or DT9818 32 OEM module DT9818 OEM or an Digital Input Line 0 34 27 26 TTL I t PRESS TELS Digital Input DT9818 32 OEM gt Line 1 J3 Connector 1000000000000 0000000000 DO 44 Digital Ground Figure 14 Connecting Digital Inputs Shown for Lines 0 and 1 to the DT9818 OEM or DT9818 32 OEM Module Figure 15 shows how to connect a digital output line 0 Port B in this case to a DT9818 OEM or DT9818 32 OEM module DT9818 OEM or DT9818 32 OEM J3 Connector 1000000000000 DODDODDODODDDOD p 68 61 44 0 Out LED On A AN Cal 500 Q Digital Output Line 0 Digital Ground Figure 15 Connecting Digital Outputs Shown for Line 0 to the DT9818 OEM or DT98
32. connector You can access the pins either by using the EP333 cable and STP37 screw terminal panel available from Data Translation or by building your own cable panel Refer to page 154 for connector pin assignments External DAC clock or trigger signal If your version of the BNC connection box supports analog output operations you can wire external clock trigger signals in one of the following ways Using the BNC connectors labelled DAC Clock and DAC Trig Using the appropriate pins on the C T DAC Clk Trig connector You can access the pins either by using the EP333 cable and STP37 screw terminal panel available from Data Translation or by building your own cable panel Refer to page 154 for connector pin assignments The following sections describe how to wire signals using the BNC or D sub connectors Wiring Signals to the BNC Connectors This section describes how to connect analog input and analog output signals to the BNC connectors on the BNC box To connect digital I O and counter timer signals to the BNC connector box you must wire signals to the D sub connectors on the box described on page 152 149 Appendix C Connecting Single Ended Analog Inputs Figure 40 shows how to connect single ended voltage inputs channels 0 and 1 in this case to the BNC connectors on the BNC connection box Note If you are using single ended inputs make sure that bias return resistance is disabled in the Open
33. continuous edge to edge measurement mode 92 103 wiring 48 Control Panel applet 66 107 conversion modes continuous analog output 80 continuous scan mode 73 digital I O 85 externally retriggered scan 75 scan 72 single value analog input 72 single value analog output 80 software retriggered scan 74 conversion rate 73 75 counter timer channels 87 99 clock sources 88 102 clock falling edge type 103 clock rising edge type 103 connecting edge to edge signals 47 48 connecting frequency measurement signals 46 connecting period signals 46 connecting pulse width signals 46 connecting up down counting signals 45 continuous edge to edge measurement mode 103 Index edge to edge measurement mode 103 event counting 103 gate types 88 gate falling edge type 103 gate rising edge type 104 high edge gate type 103 high level gate type 103 high to low output pulse 103 internal gate type 103 interrupt driven operations 104 low edge gate type 103 low level gate type 103 low to high output pulse 103 one shot mode 103 rate generation mode 103 repetitive one shot mode 103 specifying in the input channel gain list 69 subsystem specifications 122 up down counting 103 variable pulse width 103 wiring event counting signals 44 45 wiring frequency measurement signals 46 wiring pulse output signals 49 counting events 90 current loop inputs 41 customer service 109 D D A see analog output 120 DAC Over Sample error 84 data encoding 76 84
34. digital input lines as either channel 32 for the DT9818 32 OEM module or channel 16 for all other DT9818 modules in the input channel gain list refer to page 68 for more information The input sample clock internal or external paces the reading of the digital input port as well as the acquisition of the analog input and counter timer channels refer to page 72 for more information Digital output For digital output operations enter the digital output port all 8 digital output lines as channel 2 in the output channel gain list refer to page 78 for more information The output clock internal or external paces the update of the digital output port as well as the update of the analog output channels refer to page 80 for more information 86 Principles of Operation Counter Timer Features This section describes the following features of counter timer C T operations C T channels described below C T clock sources described on page 88 Gate types described on page 88 Pulse types and duty cycles described on page 89 C T operation modes described on page 89 C T Channels The DT9818 modules provide two 32 bit counter timers The counters are numbered 0 and 1 Each counter accepts a clock input signal and gate input signal and outputs a pulse pulse output signal as shown in Figure 30 Clock Input Signal i internal a el gt Counter __ Pulse Output Signal NENNEN G
35. example of how to connect a digital output In the Quick DataAcq application choose Digital Output from the Control menu Select the DT9818 module from the Board list box Click the appropriate indicator lights to select the types of signals to write from the digital output lines If you select a light the module outputs a high level signal if you do not select a light the module outputs a low level signal You can also enter an output value for the lower eight digital output lines 0 to FF in the Hex text box Click Send The values of the lower eight digital output lines are output appropriately Verifying the Operation of a Module Testing Frequency Measurement To verify that the module can perform a frequency measurement operation do the following 1 Wire an external clock source to counter timer 0 on the DT9818 module Refer to page 59 for an example of how to connect an external clock Note The Quick DataAcq application works only with counter timer 0 2 In the Quick DataAcq application choose Measure Frequency from the Acquisition menu 3 Select the DT9818 module from the Board list box 4 In the Count Duration text box enter the number of seconds during which events will be counted 5 Click Start to start the frequency measurement operation The operation automatically stops after the number of seconds you specified has elapsed and the frequency is displayed on the screen If you want to stop th
36. in this case a rising edge on the C TO Clk In signal and the stop edge in this case a falling edge on the C TO Gate signal You specify the start edge and the stop edge in software Refer to page 91 for more information on edge to edge measurement operations C TO Clk In Signal gt DT9818 OEM or Source 0 DT9818 32 OEM J3 Connector 10 1 OOO 0000000000000 Signal COO 000000900000 Source 1 43 40 35 C TO Gate E Digital Ground Figure 21 Connecting Counter Timer Signals for an Edge to Edge Measurement Operation Shown for C TO 47 Chapter 3 Continuous Edge to Edge Measurement Figure 22 shows how to connect counter timer signals to the DT9818 OEM or DT9818 32 OEM module to perform a continuous edge to edge measurement operation The counter measures the number of counts between two consecutive start edges in this case a rising edge on the C TO Clk In signal You specify the start edge in software Refer to page 92 for more information on continuous edge to edge measurement operations C TO Clk In Signal gt Source DT9818 OEM or DT9818 32 OEM J3 Connector 10 1 000 0000000000000 OOO DDODDODODDDO Digital Ground Figure 22 Connecting Counter Timer Signals for a Continuous Edge to Edge Measurement Operation Shown for C TO 48 Wiring Signals Connecting Pulse Output Signals Figure 23 shows an example o
37. list Table 8 Specifying Channels in an Output Channel Gain List Example Channel Gain List Entry Channel Gain Operation Description 0 0 1 DAC 0 Update DAC 0 1 1 1 DAC 1 Update DAC 1 2 2 1 Digital Output Port Update the digital output port by specifying channel 2 in the list Values that you specify in an output buffer are output simultaneously to the specified channels in the output channel gain list The data in the buffer is output in order from the first entry in the buffer to the last entry in the buffer Since the maximum throughput for each output channel is 150 kSamples s the effective throughput rate for two output channels is 300 kSamples s Note The digital output port is treated like any other channel in the output channel gain list therefore all the clocking triggering and conversion modes supported for analog output channels are supported for the digital output port if you specify the digital output port in the output channel gain list Output Ranges and Gains Each DAC on the DT9818 module can output bipolar analog output signals in the range of 10 V Through software specify the range for the entire analog output subsystem as 40 V to 10 V and the gain for each DAC as 1 79 Chapter 5 Output Triggers A trigger is an event that occurs based on a specified set of conditions The DT9818 module supports the following output trigger sources Software
38. module In the DAC Output Voltage box select 9 375 V Adjust the offset by entering values between 0 and 255 in the DAC 0 Offset edit box or by clicking the up down buttons until the voltmeter reads 9 375 V In the DAC Output Voltage box select 9 375 V Adjust the gain by entering values between 0 and 255 in the DAC 0 Gain edit box or by clicking the up down buttons until the voltmeter reads 9 375 V Connect an external precision voltmeter to Analog Output 1 DAC Ch1 of the DT9818 module In the DAC Output Voltage box select 9 375 V Adjust the offset by entering values between 0 and 255 in the DAC 1 Offset edit box or by clicking the up down buttons until the voltmeter reads 9 375 V In the DAC Output Voltage box select 9 375 V Adjust the gain by entering values between 0 and 255 in the DAC 1 Gain edit box or by clicking the up down buttons until the voltmeter reads 9 375 V Once you have finished this step the analog output circuitry is calibrated Note At any time you can click Restore Factory Settings to reset the D A calibration values to their original factory settings This process will undo any D A calibration settings To close the DT9818 Calibration Utility click the close box in the upper right corner of the window m Specifications Analog Input bp cification amp sisse seeders e pine n ee ok eon en ec eig 118 Analog Output Specificato Se ie de He e DER IR Ag ae eed oie 120 Digital I
39. rolls over to 0 and starts counting again Using software specify the counter timer mode as event counting count the C T clock source as external and the active gate type as low level or high level Make sure that the signals are wired appropriately Refer to page 44 for an example of connecting an event counting application Up Down Counting Use up down counting mode if you want to increment or decrement the number of rising edges that occur on the Counter n Clock input depending on the level of the Counter n Gate signal If the Counter n Gate signal is high the C T increments if the specified gate signal is low the C T decrements Using software specify the counter timer mode as up down counting up down and the C T clock source as external Note that you do not specify the gate type in software Make sure that the signals are wired appropriately Refer to page 45 for an example of connecting an up down counting application Note Initialize the counter timer so that the C T never increments above FFFFFFFFh or decrements below 0 90 Principles of Operation Frequency Measurement Use frequency measurement mode if you want to measure the number of rising edges that occur on the Counter n Clock input over a specified duration You can connect a pulse of a known duration such as a one shot output of another user counter to the Counter n Gate input signal Use software to set up the counter timers as fo
40. section describes how to connect single ended pseudo differential and differential voltage inputs as well as current loops to a DT9818 OEM or DT9818 32 OEM module Connecting Single Ended Voltage Inputs If you are using single ended inputs set up the software so that bias return resistance is not used For more information refer to page 29 Figure 8 shows how to connect single ended voltage inputs channels 0 1 and 8 in this case to a DT9818 OEM or DT9818 32 OEM module DT9818 OEM or DT9818 32 OEM Signal J 2 Connector Amplifier Low Source E Andoaina 34 32 2 nalog In Iona eeoooooooooo odo 4 oOOOOOOOOoOoOoOo OOO tm Analog In 8 68 36 e Analog In 1 Analog Ground Ensure that you connect Analog Ground to Amplifier Low Figure 8 Connecting Single Ended Voltage Inputs Shown for Channels 0 1 and 8 to the DT9818 OEM or DT9818 32 OEM Module 37 Chapter 3 Connecting Pseudo Differential Voltage Inputs Figure 9 shows how to connect pseudo differential voltage inputs channels 0 1 and 8 in this case to a DT9818 OEM or DT9818 32 OEM module E i DT9818 OEM or 3 igna DT9818 32 OEM ource J 2 Connector 34 32 2 Analog In 0 bmi mh 555050000000 u OOO DODDODODDODODODO OOO re Analog In 8 68 36 _ Vsource 8 8 Analog In 1 4 Vsource 1 Amplifier Low Q
41. sure that the signals are wired appropriately Refer to page 49 for an example of connecting a repetitive one shot application D Supported Device Driver Capabilities Data Plow and Operation DpDODE 4 8 ere ee 4 E E ong 97 Prog MT H UM M 98 TU POE Gest DEDI oco eoo eer eerte et eee eee ene oen deest inta 98 QUII tr A aci et aao ago o ORA Rok dE vcl o OR ppc 99 S OUT ri Dono e e A A A E E E A E T ET 100 e e E A E UB ec RU oe ub S Ed E 100 Thermocouple and RTD Support sc cess mn as Rer Eee RR RE etr ve r 101 a utate Es 101 ji nnn 102 S E 102 Counter TIAS A Rx ovens ee ed ER whe we Ea EE 103 95 Chapter 6 The DT9818 Device Driver provides support for the analog input A D analog output D A digital input DIN digital output DOUT and counter timer C T subsystems For information on how to configure the device driver refer to page 29 Table 9 DT9818 Subsystems orate AD oa ow seu cr Jawo Total Subsystems on Module a The DIN subsystem contains 8 digital input lines b The DOUT subsystem contains 8 digital output lines The tables in this chapter summarize the features available for use with the DT Open Layers for NET Class Library and the DT9818 modules The DT Open Layers for NET Class Library provides properties that return support information for specified subsystem capabilities The first row in each table lists the subsystem types The first column i
42. to disk The quickDAQ application An evaluation version of this NET application is included on the Data Acquisition OMNI CD quickDAQ lets you acquire analog data from all devices supported by DT Open Layers for NET software at high speed plot it during acquisition analyze it and or save it to disk for later analysis Measure Foundry An evaluation version of this software is included or provided via a link on the Data Acquisition OMNI CD Measure Foundry is a drag and drop test and measurement application builder designed to give you top performance with ease of use development Order the full development version of this software package to develop your own application using real hardware DT Open Layers for NET Class Library Use this class library if you want to use Visual C or Visual Basic for NET to develop your own application software for a DT9818 module using Visual Studio 2003 or Visual Studio 2005 the class library complies with the DT Open Layers standard DataAcq SDK Use the Data Acq SDK if you want to use Visual Studio 6 0 and Microsoft C or C to develop your own application software for a DT9818 module using Windows XP Windows Vista or Windows 7 the DataAcq SDK complies with the DT Open Layers standard DTx EZ DTx EZ provides ActiveX controls which allow you to access the capabilities of the DT9818 module using Microsoft Visual Basic or Visual C DTx EZ complies with the DT Open Layers standard DAQ
43. to the module Output Conversion Modes DT9818 modules support the following conversion modes Single value operations are the simplest to use but offer the least flexibility and efficiency Use software to specify the analog output channel that you want to update and the value to output from that channel For a single value operation you cannot specify a clock source trigger source or buffer Single value operations stop automatically when finished you cannot stop a single value operation Continuous analog output operations take full advantage of the capabilities of the DT9818 module In this mode you can specify an output channel gain list clock source trigger source buffer and buffer wrap mode Two continuous analog output modes are supported continuously paced and waveform generation mode These modes are described in the following subsections 80 Principles of Operation Continuously Paced Analog Output Use continuously paced analog output mode if you want to accurately control the period between conversions of individual channels in the output channel gain list refer to page 78 for information on specifying the output channel gain list Use software to fill the output buffer with the values that you want to write to the DACs and to the digital output port if applicable For example if your output channel gain list contains only DACO and the digital output port specify the values in the output buffer as follow
44. value operations stop automatically when finished you cannot stop a single value Operation Scan mode takes full advantage of the capabilities of the DT9818 module For a scan you can specify an input channel gain list clock source trigger source scan mode and buffer using software Two scan modes are supported continuous scan mode and triggered scan mode often called burst mode These modes are described in the following subsections Using software you can stop a scan by performing either an orderly stop or an abrupt stop In an orderly stop the module finishes acquiring the data stops all subsequent acquisition and transfers the acquired data to host memory any subsequent triggers are ignored 72 Principles of Operation In an abrupt stop the module stops acquiring samples immediately the acquired data is not transferred to host memory and any subsequent triggers are ignored Continuous Scan Mode Use continuous scan mode if you want to accurately control the period between conversions of individual channels in a scan Figure 25 shows the timing diagram for a continuous scan operation On each pulse of the sample clock the corresponding channel in the input channel gain list is read Trigger Sample Clock a ix channel oo E n 0 1 n 0 Gain List Entry D xs Figure 25 Timing Diagram for a Continuous Scan Operation When it detects an initial
45. 18 32 OEM Module 43 Chapter 3 Connecting Counter Timer Signals The DT9818 OEM and DT9818 32 OEM modules provide two 32 bit counter timer channels that you can use for the following operations Event counting Up down counting Frequency measurement Period pulse width measurement Edge to edge measurement Continuous edge to edge measurement Pulse output rate generation one shot and repetitive one shot This section describes how to connect counter timer signals to perform these operations Event Counting Figure 16 shows an example of connecting event counting signals to a DT9818 OEM or DT9818 32 OEM module using counter timer 0 In this example the counter counts the number of rising edges that occur on the C TO Clk In signal when the C TO Gate signal is in the active state as specified by software Refer to page 90 for more information on event counting operations PF B DT9818 OEM or C TO CIk In DT9818 32 OEM J3 Connector Signal Source a A C TO Gate 5 External Gating Switch Digital Ground Digital Ground Figure 16 Connecting Counter Timer Signals for an Event Counting Operation Shown for C TO with an External Gate Wiring Signals Figure 17 shows another example of connecting event counting signals to a DT9818 OEM or DT9818 32 OEM module using counter timer 0 In this example a software gate is used to start the event countin
46. 2 of the EP353 panel either by using the EP360 cable and STP37 screw terminal panel available from Data Translation or by building your own cable panel Refer to page 136 for connector pin assignments on the EP353 panel Wiring to an EP355 Screw Terminal Panel Attach the EP355 screw terminal panel to connector J2 on the DT9818 OEM or DT9818 32 OEM module when you want to access the analog input signals Attach the EP355 screw terminal panel to connector J3 on the DT9818 OEM or DT9818 32 OEM module when you want to access the analog output counter timer digital I O trigger and clock signals Figure 6 shows how to attach the EP355 to the module Refer to page 139 for screw terminal assignments EP355 Screw Terminal Panels Module Connector J2 Module Connector J3 DT9818 OEM or DT9818 32 OEM Module Figure 6 Connecting EP355 Panels to Connector J2 and Connector J3 on the DT9818 OEM or DT9818 32 OEM Module 35 Chapter 3 Wiring to an EP356 Accessory Panel To attach an EP356 accessory panel to the DT9818 OEM or DT9818 32 OEM module plug the EP356 panel into connector J3 on the module as shown in Figure 7 EP356 Accessory Panel 37 Pin Connector J1 DT9818 or DT9818 32 OEM 37 Pin Connector J2 Connector J2 Conn ctor J3 Figure 7 Connecting the EP356 Panel to Connector J3 on the DT9818 OEM or DT9818 32 OEM Module Use connector J1 on the EP356 accessory panel to attach digital I O signals
47. 65 A os Output Paaties esos keso espusa rese rhbp er eq kp e EP D dab d ees 78 Digital L O Peru occiso Rb RE Dre ECDDOE e HE x s E er EE EE UT 85 Counter Timer Feablreb isses te epbetve es 87 63 Chapter 5 Figure 24 shows a block diagram of the DT9818 module up to 32 Programmable ID SRAM Analog Gain 1 2 4 8 Flash 128KB Input Channels 16 Bit Input 12C Memory ADC M FIFO USB Bus w USB m Channel Input A Interface B Select Select Clock Input P Clock 8 Digital Inputs Digitalln 7 0 8 Bit P Digital In Input Select Control Address Decode 2 Counter Timers UserClock 1 0 2 x 32 bit UserGate 1 0 n ei eg UserOut 1 0 E 2 Analog Output m u Channels S E Reference Anal to 16 Bit 5 ee ogQuto DAC 2 Clock Output Select OutputClock 71 S Control Input 3 Channel Gain t AnalogOut1 16 Bit L KER ligt OutputClock DAC Bio e outer Output Input 8 Digital Outputs FIFO CGL DigitalOut 7 0 8 Bit Controls Bi dm ub A Digital Output Clock Out ExtADCTrigger j ADCTrigger ADCTrigger EXLADOGIOOK sy p Triggers InputClock InputClock ExtDACTrigger
48. 8 number of scans per trigger 98 retrigger frequency 98 triggers analog input 76 external 76 80 external negative digital 102 external positive digital 102 software 76 80 102 specifications 123 troubleshooting procedure 106 service and support procedure 108 Index troubleshooting table 106 TTL trigger 76 80 U underflow error 84 units counter timer 87 unpacking 25 up down counting 90 103 wiring 45 updating the digital output port 78 USB cable 26 27 V variable pulse width 103 Visual Basic for NET programs 18 Visual Basic programs 18 Visual C programs 18 Visual C programs 18 voltage ranges 71 100 number of 100 W waveform generation mode 82 wiring signals analog outputs 42 151 continuous edge to edge measurement 48 current loop analog inputs 41 differential analog inputs 38 151 digital inputs and outputs 43 edge to edge measurement 47 event counting applications 44 45 frequency measurement applications 46 period measurement 46 preparing 33 pseudo differential analog inputs 38 150 pulse output applications 49 pulse width measurement 46 recommendations 33 single ended analog inputs 37 150 to the BNC connection box 148 to the STP connection box 155 up down counting 45 writing programs in C C 18 Visual Basic 18 Visual Basic NET 18 Visual C 18 Visual C 18 169 Index 170
49. 8 SE a If you are using the single ended or pseudo differential configuration ensure that you connect this signal to analog ground on the module and to analog ground from your signal source Refer to page 37 and page 38 for more information These pins are used for the DT9818 32 OEM module only The first signal description applies to the differential configuration the second signal description applies to the single ended configuration c These pins are used for the DT9818 OEM and DT9818 32 OEM modules The first signal description applies to the differential configuration the second signal description applies to the single ended configuration 133 Appendix B Connector J3 on the Module Figure 34 shows the orientation of the pins for connectors J3 on the DT9818 OEM and DT9818 32 OEM modules Pin 34 Pin 1 00000000000000000000000000000000 0000000000000000000000000000000000 Pin 68 Pin 35 Figure 34 Orientation of the Pins for Connector J3 on the DT9818 OEM and DT9818 32 OEM Modules Table 36 lists the pin assignments for connector J3 on the DT9818 OEM and DT9818 32 OEM modules Table 36 Pin Assignments for Connector J3 on the DT9818 OEM and DT9818 32 OEM Modules Pin Signal Description Pin Signal Description 1 Reserved 35 Reserved 2 5V_User 36 Digital Ground 3 Reserved 37 Reserved 4 Reserved 38 Digital Ground 5 Reserved 39 Reserved 6 Reserved 40 Digita
50. Adaptor for MATLAB Data Translation s DAQ Adaptor provides an interface between the MATLAB Data Acquisition DAQ subsystem from The MathWorks and Data Translation s DT Open Layers architecture LV Link An evaluation version of this software is included on the Data Acquisition OMNI CD Use LV Link if you want to use the LabVIEW graphical programming language to access the capabilities of the DT9818 module Refer to the Data Translation web site ww w datatranslation com for information about selecting the right software package for your needs Overview Accessories You can purchase the following optional items from Data Translation for use with the DT9818 module EP353 Accessory panel that provides one 37 pin D sub connector and one 26 pin connector for attaching analog input signals EP355 Screw terminal panel that provides 14 position screw terminal blocks for attaching analog input analog output counter timer digital I O trigger and clock signals EP356 Accessory panel that provides two 37 pin D sub connectors for attaching digital I O analog output counter timer trigger and clock signals STP37 Screw terminal panel that provides 37 screw terminal blocks for attaching analog output counter timer digital I O trigger and clock signals EP333 2 meter shielded cable with two 37 pin connectors that connect an EP356 accessory panel to an STP37 screw terminal panel EP360 2 meter shielded cable wi
51. CER ANE AUS 76 Error Conditions 2 A CR ARCU CN ERE ROC ER E X RR SOR t a i 77 Analog Output Features ecc ere d ee eh aes o etes 78 Output Resolution eie eme m aac eade e ve yr p e es 78 Analog Output Channels sssseeeeee nnn 78 Specifying a Single Analog Output Channel ssssssssssss 78 Specifying Multiple Analog Output Channels and or the Digital Output Port 78 Output Ranges and Gains riostar a a E EE a KEER E n EEE EA E EEA 79 Output Irggers o usua eee a A a e TCR A AE 80 Contents Output Clocks 2 scene OHNE eec awe vorn ted ee LE SAR 80 Output Conversion Modes 6 ccc eene 80 Continuously Paced Analog Output oooocoococcoccncronnonnnnnr 81 Waveform Generation 0000 ccc hs 82 Data Format and Wansfert 5 0 60 esses e veges Re esas saad eyelet ERR YS 84 Error Conditions ss 45e ye ope e dnb oti A ead eee NAR TRUE P DUE 84 Digital I O Features e eese ee ecce ecce eee see ar erede nea 85 Digital I O Eines some savas mad a ave emper dde ng dese Saa etos 85 Operation Modesto ER EORR ROSE a RA e tO deo t AA 85 Counter Timer Features 87 C F Channels 2 5 soit sia a ee Rede denied de RU 87 C T Clock SOUTO oe e neces RUN a nee SEU aed US 88 Gate Types s dive esa vd ese RO ta exe acer ay aie e MO A 88 Pulse Output Types and Duty Cycles 0 000 89 Counter Timer Operation Modes 00 0 e eee eee 89 Event Counting ein aati aaa eae ee Sa lies step dina 90 Up Down
52. Counting pee qu REPLIED a pee three e n 90 Frequency Measurement sisin eanes aaa K aE aaan a aE nn 91 Edge to Edge Measurement 06666 91 Continuous Edge to Edge Measurement 00 000000 e eee eee 92 Rate Generat once ies esten RU Rar NE ERIE Oey NARI PAGE nate iad 92 OneShot uir Sn ea ene eene e i eae ee I a a RERO 93 R petitiveOne 5hot ssi sss see o mise me be e eie ven Rem ne 94 Chapter 6 Supported Device Driver CapabilitieS lt 95 Data Flow and Operation Options sisssssssss nn 97 BUSTO Sivad ee nee SIR t Hel ete eat Sue se Su ed 98 Triggered Scan Mode 4 ees or y Ru e esas he esq ce sue pae a 98 Data Encoder ed eri DELTE 98 Channels io A A A EA 99 E E Rd idus e d AEN 99 RANE ES ce seb Gh GLY ber e c toe Spe tet outta oc Ie Sl E SML 100 Resolution eoo Pet ree enne E ERE eR eth De We d e 100 Thermocouple and RTD Support o oooooccoccccocorr rr 101 IEPE SUDDORE to is eRe ck o etos f m te eS 101 JHIBeers un siia xs eoa owed caet ud sce east dee A adduct gestat 102 Clocks ette eR sede RS b eek Ua ER RASEN RES 102 Counter imersa A tnde co elt ete caren ptt iret EN Dro eter Fas 103 Contents Chapter 7 Troubleshooting 000 c cece eee eee eee 105 General Checklist seis eee Dr OR OR tea SU gee e eres 106 Technical Support 2 222 eme a ms map AR E HR me E E ea Rn 108 If Your Module Needs Factory Service sse 109 Chapter 8 Calibration 21 daa Ex
53. E EB AE 158 Screw Terminal Block TB4 0 eee e 159 Screw Terminal Block TBS 5 esee e IR EDEN abana US RUP RR RS 160 Screw Terminal Block TB6 o ococooccoccocccocrr ene eae 161 Screw Terminal Block TB7 sssssessessesseeese e 162 hl c EUM 163 Contents 10 About this Manual This manual describes how to install and set up your DT9818 module and device driver and verify that your module is working properly This manual also describes the features of the DT9818 module the capabilities of the DT9818 Device Driver and how to program the DT9818 module using the DT Open Layers for NET Class Library software Troubleshooting information is also provided Note For information on checking system requirements installing the software and viewing the documentation refer to the README file on the OMNI CD For more information on the class library refer to the DT Open Layers for NET Class Library User s Manual If you are using the DataAcq SDK or a software application to program your device refer to the documentation for that software for more information Intended Audience This document is intended for engineers scientists technicians or others responsible for using and or programming the DT9818 module for data acquisition operations in the Microsoft Windows XP Windows Vista or Windows 7 operating system It is assumed that you have some familiarity with data acquisition principles an
54. T C T QUAD Programmable Gain Support SupportsProgrammableGain Yes Number of Gains NumberOfSupportedGains 4 1 1 1 0 0 Gains Available SupportedGains 1 2 4 81 1 1 99 Chapter 6 Ranges Resolution 100 Table 16 DT9818 Range Options DT9818 A D D A DIN DOUT C T QUAD Number of Voltage Ranges NumberOfRanges 1 1 0 0 0 0 Available Ranges SupportedVoltageRanges 10V 10V Current Output Support SupportsCurrentOutput Table 17 DT9818 Resolution Options DT9818 A D D A DIN DOUT C T QUAD Software Programmable Resolution SupportsSoftwareResolution Number of Resolutions NumberOfResolutions 1 1 1 1 1 0 Available Resolutions SupportedResolutions 16 16 8 8 32 Supported Device Driver Capabilities Thermocouple and RTD Support Table 18 DT9818 Thermocouple and RTD Support Options DT9818 A D D A DIN DOUT C T QUAD Thermocouple Support SupportsThernocouple RTD Support SupportsRTD Resistance Support ReturnsOhms Voltage Converted to Temperature in Hardware SupportsTemperatureDatalnStream Supported Thermocouple Types ThermocoupleType Supported RTD Types RTDType Supports CJC Source Internally in Hardware SupportsCjcSourcelnternal Supports CJC Channel SupportsCjcSourceChannel Available CJC Channels CjcChannel Supports Interleaved CJC Values in Data Stream SupportsInterleavedCjcT
55. again using a gain of 1 input range of 10 V 3 6 4 AIN6 Read analog input channel 6 using a gain of 4 input range of 2 5 V 4 32 1 DIN Read the digital input port of the DT9818 32 OEM module by specifying channel 32 in the list for all other modules specify channel 16 1023 1 8 AIN1 Read analog input channel 1 using a gain of 8 input range of 1 25 V Note If the digital input port is the only channel in the channel gain list the module can read this channel at the maximum A D sampling rate The digital channel is treated like any other channel in the analog input channel gain list therefore all the clocking triggering and conversion modes supported for analog input channels are supported for these digital input lines if you specify them this way 68 Principles of Operation Specifying Counter Timers in the Input Channel Gain List You can read the value of one or both counter timer channels on the DT9818 module using the input channel gain list This feature is particularly useful when you want to correlate the timing of analog and counter timer events Note Typically the counter timers should be configured for continuous edge to edge measurement mode when you want to read the value of the counter timer channels through the input channel gain list Refer to page 92 for more information on this operation mode To read a counter timer channel specify the appropriate channel number in the input
56. als to the DT9818 OEM or DT9818 32 OEM module In this case the frequency of the C T 0 Clk In signal is the number of counts divided by the period of the C TO Gate signal Refer to page 91 for more information on frequency measurement operations f MN DT9818 OEM or CITO Cik In DT9818 32 OEM d J3 Connector C T1 Out Signal 1 Source OOO 000000000000 000 Dogoooooooooo 43 40 35 ig C TO Gate Digital Ground Figure 19 Connecting Counter Timer Signals for a Frequency Measurement Operation Shown for C TO Period Pulse Width Measurement Figure 20 shows how to connect counter timer signals to the DT9818 OEM or DT9818 32 OEM module to perform a period pulse width measurement operation on counter timer 0 You specify the active pulse high or low in software The pulse width is the percentage of the total pulse period that is active Wiring Signals A C TO Clk In DT9818 OEM or gt DT9818 32 OEM J3 Connector Signal 10 1 cil COD 0000000000000 000 DDDODDDDDODDODO 40 35 Digital Ground Figure 20 Connecting Counter Timer Signals for a Period Pulse Width Measurement Operation Shown for C TO Edge to Edge Measurement Figure 21 shows how to connect counter timer signals to the DT9818 OEM or DT9818 32 OEM module to perform an edge to edge measurement operation using two signal sources The counter measures the number of counts between the start edge
57. are useful when you are measuring high level signals when noise is not significant when the source of the input is close to the module and when all the input signals are referred to the same common ground 65 Chapter 5 66 e Pseudo Differential Pseudo differential channels are useful when noise or common mode voltage the difference between the ground potentials of the signal source and the ground of the screw terminal panel or between the grounds of other signals exists and when the differential configuration is not suitable for your application This option provides less noise rejection than the differential configuration however more analog input channels are available e Differential Differential channels are useful when you want to measure low level signals when noise is a significant part of the signal or when common mode voltage exists The BNC connection box is shipped in either a differential or single ended channel configuration For the standard version of the module you configure the channel type as single ended or differential through software Note Ensure that the analog output subsystem is not running when you change the channel type of the analog input subsystem or an error is reported For pseudo differential inputs specify single ended in software in this case how you wire these signals determines the configuration refer to page 38 for more information Using the Open Layers Control Panel ap
58. ata Translation Inc 100 Locke Drive Marlboro MA 01752 1192 109 Chapter 7 110 Using the Calibration Utility Calibrating the Analog Input Subsystem Calibrating the Analog Output Subsystem Calibration 111 Chapter 8 112 DT9818 modules are calibrated at the factory and should not require calibration for initial use We recommend that you check and if necessary readjust the calibration of the analog input and analog output circuitry on the DT9818 modules every six months using the DT9818 Calibration Utility This chapter describes how to calibrate the analog input and output subsystems of DT9818 modules using the DT9818 Calibration Utility Calibration Using the Calibration Utility Start the DT9818 Calibration Utility as follows 1 Click Start from the Task Bar and then select Programs Data Translation Inc Calibration DT9818 Calibration Utility The main menu of the DT9818 Calibration Utility appears 2 Select the module to calibrate and then click OK Once the DT9818 Calibration Utility is running you can calibrate the analog input circuitry either automatically or manually described on page 114 or the analog output circuitry of the DT9818 module described on page 116 113 Chapter 8 Calibrating the Analog Input Subsystem This section describes how to use the DT9818 Calibration Utility to calibrate the analog input subsystem of aDT9818 module Connect
59. ate Input Signal software or external input Figure 30 Counter Timer Channel To specify the counter timer to use in software specify the appropriate C T subsystem For example counter timer 0 corresponds to C T subsystem element 0 counter timer 1 corresponds to C T subsystem element 1 Using software you can also specify one or more of the counter timers in the input channel gain list You need two channel gain list entries to read a 32 bit counter value The first entry stores the lower 16 bit word and the second entry stores the upper 16 bit word If you need only the lower 16 bit word you do not have to include the second entry The entire 32 bit count value is latched when the lower 16 bit word is stored This prevents the counter timer from incrementing between samples Refer to page 69 for more information about using C Ts in the input channel gain list 87 Chapter 5 C T Clock Sources The following clock sources are available for the counter timers Internal C T clock The internal C T clock always uses an 48 MHz time base Through software specify the clock source as internal and specify the frequency at which to pace the operation this is the frequency of the Counter n Out signal External C T clock An external C T clock is useful when you want to pace counter timer operations at rates not available with the internal C T clock or if you want to pace at uneven intervals The frequency of th
60. ate type 103 LV Link 18 M MaxDifferentialChannels 99 MaxExtClockDivider 102 MaxFrequency 102 MaxMultiScanCount 98 MaxRetriggerFreq 98 MaxSingleEndedChannels 99 Measure Foundry 18 measuring frequency 91 measuring pulses 91 92 MinExtClockDivider 102 MinFrequency 102 MinRetriggerFreq 98 Index N number of differential channels 99 gains 99 I O channels 99 resolutions 100 scans per trigger 98 single ended channels 99 voltage ranges 100 NumberOfChannels 99 NumberOfRanges 100 NumberOfResolutions 100 NumberOfSupportedGains 99 Nyquist Theorem 72 O one shot pulse output 93 103 online help 53 Open Layers Control Panel applet 66 107 operation modes continuous digital I O 86 continuous scan 73 externally retriggered scan 75 single value analog input 72 single value analog output 80 single value digital I O 85 software retriggered scan 74 triggered scan 74 waveform generation 82 output channel gain list 78 clock sources 80 pulses 103 ranges 79 output channel gain list specifying analog output channels 78 specifying the digital output port 78 Output FIFO Underflow error 84 outputting pulses 49 60 92 93 94 over sample error 77 84 overflow error 77 P period measurement 92 wiring 46 physical specifications 126 pin assignments Analog Input connector 152 Digital In Out connector 153 ports digital I O 85 post trigger acquisition mode 97 power specifications 126 preparing to wire signals
61. conversion modes 80 data format and transfer 84 Index error conditions 84 gain 79 ranges 79 resolution 78 single value operations 80 specifying an output channel gain list 78 subsystem specifications 120 testing single value operations 55 wiring 42 151 applet Open Layers Control Panel 66 107 application wiring analog outputs 42 151 continuous edge to edge measurement 48 current loop analog inputs 41 differential analog inputs 38 151 digital inputs and outputs 43 edge to edge measurement 47 event counting applications 44 45 frequency measurement applications 46 period measurement 46 pseudo differential analog inputs 38 150 pulse output applications 49 pulse width measurement 46 single ended analog inputs 37 150 up down counting 45 applications LV Link 18 Measure Foundry 18 Quick DataAcq 18 B base clock frequency 102 BaseClockFrequency 102 bias return resistance 29 38 binary data encoding 98 buffers 98 inprocess flush 98 single wrap mode 98 C C C programs 18 C T see counter timer 122 cables EP333 19 EP360 19 163 Index 164 USB 26 27 calibrating the module analog input subsystem 114 analog output subsystem 116 running the calibration utility 113 CGL see channel gain list 99 CGLDepth 99 channel type differential 99 single ended 99 channel gain list depth 99 updating the digital output port 78 channel list inhibit 99 channels analog input 65 analog output 78 counter timer 87
62. ctor J1 on the EP353 Panel Figure 35 shows the orientation of the pins for connector J1 on the EP353 panel Pin2 Pin 26 EE 000000000000 Pin 1 Pin 25 Figure 35 Orientation of the Pins for Connectors J1 on the EP353 Panel Table 37 lists the pin assignments for connector J1 on the EP353 accessory panel Table 37 EP353 Connector J1 Pin Assignments Pin Signal Description Pin Signal Description 1 Analog Input O 2 Analog Input 0 DI Return Analog Input 8 SE 3 Analog Ground 4 Analog Input 1 DI Return Analog Input 9 SE 5 Analog Input 1 6 Analog Ground 7 Analog Input 2 8 Analog Input 2 DI Return Analog Input 10 SE 9 Analog Ground 10 Analog Input 3 DI Return Analog Input 11 SE 11 Analog Input 3 12 Analog Ground 13 Analog Input 4 14 Analog Input 4 DI Return Analog Input 12 SE 15 Analog Ground 16 Analog Input 5 DI Return Analog Input 13 SE 17 Analog Input 5 18 Analog Ground 19 Analog Input 6 20 Analog Input 6 DI Return Analog Input 14 SE 136 Connector Pin Assignments Table 37 EP353 Connector J1 Pin Assignments cont Pin Signal Description Pin Signal Description 21 Analog Ground 22 Analog Input 7 DI Return Analog Input 15 SE 23 Analog Input 7 24 Analog Ground 25 Amplifier Low 26 Reserved a The first signal description Return applies to the differential configuration for the DT9818 OEM and
63. d that you understand your application Note The DT9818 is available in a board level OEM configuration that you can install in your own custom application DT9818 OEM or DT9818 32 OEM or in a metal BNC connection box DT9818 8DI BCN or DT9818 16SE BNC If the information in this manual applies to all versions of the module the manual uses the product name DT9818 module Otherwise the specific product name is mentioned How this Manual is Organized This manual is organized as follows Chapter 1 Overview describes the major features of the DT9818 module as well as the supported software and accessories for the module Chapter 2 Setting Up and Installing the Module describes how to install a DT9818 module how to apply power to the module and how to configure the device driver Chapter 3 Wiring Signals describes how to wire signals to a DT9818 module Chapter 4 Verifying the Operation of a Module describes how to verify the operation of the DT9818 module with the Quick DataAcq application 11 About this Manual 12 Chapter 5 Principles of Operation describes all of the features of the DT9818 module and how to use them in your application Chapter 6 Supported Device Driver Capabilities lists the data acquisition subsystems and the associated features accessible using the DT9818 Device Driver Chapter 7 Troubleshooting provides information that you can use to resolve pr
64. does not The module configuration is Check the configuration of your device driver respond incorrect The module is damaged Contact Data Translation for technical support refer to page 108 Intermittent operation Loose connections or vibrations Check your wiring and tighten any loose exist connections or cushion vibration sources The module is overheating Check environmental and ambient temperature consult the module s specifications on page 126 and the documentation provided by your computer manufacturer for more information Electrical noise exists Check your wiring and either provide better shielding or reroute unshielded wiring 106 Troubleshooting Table 23 Troubleshooting Problems cont Symptom Possible Cause Possible Solution Device failure error reported The DT9818 module cannot communicate with the Microsoft bus driver or a problem with the bus driver exists Check your cabling and wiring and tighten any loose connections The DT9818 module was removed while an operation was being performed Ensure that your DT9818 module is properly connected Data appears to be invalid An open connection exists Check your wiring and fix any open connections A transducer is not connected to the channel being read Check the transducer connections The module is set up for differential inputs while the transducers are wired as single ended inputs or
65. e to output from DACO Click Send to output a single value from analog output channel 0 The application displays the output value both on the slider and in the text box 55 Chapter 4 56 Testing Continuous Analog Input To verify that the module can perform a continuous analog input operation do the following 1 PP NS 11 12 13 Connect known voltage sources such as the outputs of a function generator to analog input channels 0 and 1 on the DT9818 module differential mode Refer to page 38 for an example of how to connect a differential analog input In the Quick DataAcq application choose Scope from the Acquisition menu Select the DT9818 module from the Board list box In the Sec Div list box select the number of seconds per division 1 to 00001 for the display In the Channel list box select analog input channel 1 and then click Add to add the channel to the channel list Note that by default channel 0 is included in the channel list Click Config from the Toolbar In the Config dialog select ChannelType and then select Differential In the Config dialog select Range and then select Bipolar Click OK to close the dialog box From the Scope view double click the input range of the channel to change the input range of the module 10 V 5 V 2 5 V or 1 25 V The default is 10 V The display changes to reflect the selected range for all the analog input channels on the module
66. e Rs eve 111 Using the Calibration Utility ssssssss eee rr 113 Calibrating the Analog Input Subsystem 06 114 Connecting a Precision Voltage Source 6 6 114 Using the Auto Calibration Procedure 00000 114 Using the Manual Calibration Procedure 0 0 cee eee eee 114 Calibrating the Analog Output Subsystem 06 eee 116 Appendix A Specifications ooooococooccnrnn ees 117 Analog Input Specifications rreri e ee rr 118 Analog Output Specifications een 120 Digital Input and Digital Output Specifications 0 6 nee 121 Counter Timer Specifications ooooooooccccccccrrrr ees 122 External Trigger Specificati0NS oooocoocccrocccrorccrr ees 123 Internal Clock Specifications sss 124 External Clock Specifications 0 nr re DE i eens 125 Power Physical and Environment Specifications s a a sossa ssr eee eee eee 126 Connector Specifications liiis 127 Regulatory Specifications oooooooococooccrrrr enn 128 Appendix B Connector Pin Assignments 00000 e eee 129 DT9818 OEM and DT9818 32 OEM Pin Assignments 00 00 cece ee o 131 Connector Jl on the Module 0 ccc cece ene eee 131 Connector J2 on the Module 0 0 cece ccc nee 132 Connector J3 on the Module 0 00 cect eee 134 EP353 Accessory Panel Pin Assignments lisse 136 Connector J1 on the EP353 Panel 0 00
67. e external C T clock can range from 0 011176 Hz to 1 MHz Connect the external clock to the Counter n Clock input signal on the DT9818 module Counter timer operations start on the rising edge of the clock input signal Using software specify the clock source as external and specify a clock divider between 2 and 4 294 967 295 Note The external C T clock the clock connected to the Counter n Clock input signal determines how often you want to count events measure frequency measure the time interval between edges or output a pulse If you specify a counter timer in the input channel gain list the external A D clock the clock connected to the External ADC Clock input signal determines how often you want to read the counter value Refer to page 69 for information about specifying counter timer channels in the channel gain list Refer to page 72 for more information about the external A D clock Gate Types The edge or level of the Counter n Gate signal determines when a counter timer operation is enabled The DT9818 module provides the following gate types None A software command enables any counter timer operation immediately after execution Logic low level external gate input Enables a counter timer operation when the Counter n Gate signal is low and disables the counter timer operation when the Counter n Gate signal is high Note that this gate type is used for event counting and rate generation modes refer to
68. e frequency measurement operation when it is in progress click Stop 59 Chapter 4 Testing Pulse Output To verify that the module can perform a pulse output operation do the following 1 Connect a scope to counter timer 0 on the DT98318 module Refer to page 60 for an example of how to connect a scope a pulse output to counter timer 0 Note The Quick DataAcq application works only with counter timer 0 2 In the Quick DataAcq application choose Pulse Generator from the Control menu 3 Select the DT9818 module from the Board list box 4 Select either Continuous to output a continuous pulse stream or One Shot to output one pulse 5 Select either Low to high to output a rising edge pulse the high portion of the total pulse output period is the active portion of the signal or High to low to output a falling edge pulse the low portion of the total pulse output period is the active portion of the signal 6 Under Pulse Width enter a percentage or use the slider to select a percentage for the pulse width The percentage determines the duty cycle of the pulse 7 Click Start to generate the pulse s The application displays the results both in text and graphical form 8 Click Stop to stop a continuous pulse output operation One shot pulse output operations stop automatically 60 Part 2 Using Your Module JJ Principles of Operation Analogs Input Teali coe queres eee ee Ure peces Pape bae e e aee
69. ection box and the STP37 screw terminal panel when used with the EP333 cable Table 44 Digital In Out Connector STP37 Pin Assignments Pin Signal Description Pin Signal Description 1 Digital In 0 20 Digital Out 0 2 Digital In 1 21 Digital Out 1 3 Digital In 2 22 Digital Out 2 4 Digital In 3 23 Digital Out 3 5 Digital In 4 24 Digital Out 4 6 Digital In 5 25 Digital Out 5 7 Digital In 6 26 Digital Out 6 8 Digital In 7 27 Digital Out 7 9 Reserved 28 Reserved 10 Reserved 29 Reserved 11 Reserved 30 Reserved 12 Reserved 31 Reserved 13 Reserved 32 Reserved 14 Reserved 33 Reserved 15 Reserved 34 Reserved 16 Reserved 35 Reserved 17 Digital Ground 36 Reserved 18 Digital Ground 37 Digital Ground 19 Chassis Ground when used with EP333 cable otherwise no connect 153 Appendix C C T DAC Clk Trig Connector The C T DAC Clk Trig connector allows you to access the counter timer analog output external clock and external trigger signals Table 45 lists the pin assignments for both the C T DAC Clk Trig connector on the BNC connection box and the STP37 screw terminal panel when used with the EP333 cable Table 45 C T DAC Clk Trig Connector Pin Signal Description Pin Signal Description 1 Analog Output 0 20 Analog Out 0 Return 2 Analog Output 1 21 Analog Out 1 Return 3 Reserved 22
70. ector pin assignments Analog output signals You can wire analog output signals in one of the following ways Using the BNC connectors labelled DAC Ch0 and or DAC Chl Using the appropriate pins on the C T DAC Clk Trig connector You can access the pins either by using the EP333 cable and STP37 screw terminal panel available from Data Translation or by building your own cable panel Refer to page 154 for connector pin assignments Digital I O signals To wire digital I O signals you must use the appropriate pins on the Digital I O connector You can access the pins either by using the EP333 cable and STP37 screw terminal panel available from Data Translation or by building your own cable panel Refer to page 153 for connector pin assignments 148 BNC and STP Box Connections e Counter timer signals To wire counter timer signals you must use the appropriate pins on the C T DAC Clk Trig connector You can access the pins either by using the EP333 cable and STP37 screw terminal panel available from Data Translation or by building your own cable panel Refer to page 154 for connector pin assignments External A D clock or trigger signal If your version of the BNC connection box supports analog input operations you can wire external clock trigger signals in one of the following ways Using the BNC connectors labelled AD Clock and AD Trig Using the appropriate pins on the CNT DAC Clk Trig
71. eens 136 Connector J2 on the EP353 Panel 0 2 cece eens 137 EP355 Screw Terminal Assignments 0 0 00 0000 ee 139 EP355 Screw Terminal Assignments when Attached to Connector J2 on the MOG Ue Ad dec ne e lcu ms Tih er AT uM uen 140 EP355 Screw Terminal Assignments when Attached to Connector J3 on the Modulez eee heed ER ERI RH ee e eU NINE DER E eR 142 EP356 Accessory Panel Pin Assignments 0 006 144 Connector J1 on the EP356 Panel 00 cece eee eee 144 Connector J2 on the EP356 Panel 0 ccc ete 145 Contents Appendix C BNC and STP Box Connections lsuss 147 Wiring to the BNC Connection Box isse en 148 Wiring Signals to the BNC Connectors 666 6 eens 149 Connecting Single Ended Analog Inputs ooooooccccccccccccccncc o 150 Connecting Pseudo Differential Analog Inputs ooooooocooorooomo 150 Connecting Differential Analog Inputs oooooococccccoccccoca e eee 151 Connecting Analog Output Signals 1 1 1 6 151 Wiring Signals to the D Sub Connectors eee 152 Analog Input Connector preerie en ea aE rr 152 Digital In Out Connector 0 000 e eee 153 C T DAC Clk Trig Connector iiem emn ek m hee ds 154 Wiring to the STP Connection Box 6 cc ee 155 Screw Terminal Block TB1 sssssssesssseeesseee ee 156 Screw Terminal Block TBZ ui pda LER UR EARN RR ET ANTA 157 Screw Terminal Block TB3 ecce er ere X ER
72. emperaturesInStream Supports Programmable Filters SupportsTemperatureFilters Programmable Filter Types TemperatureFilterType IEPE Support Table 19 DT9818 IEPE Support Options DT9818 A D D A DIN DOUT C T QUAD Software Programmable AC Coupling SupportsACCoupling Software Programmable DC Coupling SupportsDCCoupling Yes Software Programmable External Excitation Current Source SupportsExternalExcitationCurrentSrc Software Programmable Internal Excitation Current Source SupportsInternalExcitationCurrentSrc Available Excitation Current Source Values SupportedExcitationCurrentValues 101 Chapter 6 Triggers Table 20 DT9818 Trigger Options DT9818 Software Trigger Support SupportsSoftwareTrigger A D Yes D A Yes Yes DIN Yes DOUT C T Yes QUAD External Positive TTL Trigger Support SupportsPosExternalTTLTrigger Yes Yes Yes External Negative TTL Trigger Support SupportsNegExternalTTLTrigger Yes Yes External Positive TTL Trigger Support for Single Value Operations SupportsSvPosExternalTTLTrigger External Negative TTL Trigger Support for Single Value Operations SupportsSvNegExternalTTLTrigger Positive Threshold Trigger Support SupportsPosThresholdTrigger Negative Threshold Trigger Support SupportsNegThresholdTrigger Digital Event Trigger Support SupportsDig
73. ent mode the counter starts incrementing when it detects the specified start edge When it detects the next start edge type the value of the counter is stored and the next edge to edge measurement operation begins automatically Every time an edge to edge measurement operation completes the previous measurement is overwritten with the new value When you read the counter as part of the analog input data stream the current value from the last edge to edge measurement operation is returned and the value of the counter is reset to 0 Refer to page 91 for more information on edge to edge measurement mode Note This mode is typically used when you want to read the counter timer channels through the input channel gain list as described on page 69 If you read the counter before the measurement is complete 0 is returned To select continuous edge to edge measurement mode use software to specify the counter timer mode as continuous measure the C T clock source as internal and the start edge type Rate Generation Use rate generation mode to generate a continuous pulse output signal from the Counter n Out line this mode is sometimes referred to as continuous pulse output or pulse train output You can use this pulse output signal as an external clock to pace other operations such as analog input analog output or other counter timer operations The pulse output operation is enabled whenever the Counter n Gate signal is at the spec
74. ential BNC box DT9818 32 STP 32 single ended or 16 differential Screw terminal STP box Simultaneous operation of analog input analog output digital I O and counter timer subsystems Analog input subsystem 16 bit A D converter Throughput rate up to 150 kSamples s Up to 32 single ended or 16 differential analog inputs depending on the model selected Programmable gain of 1 2 4 or 8 provides input ranges of 10 5 2 5 and 1 25 V 1024 location channel gain list Single value and continuous analog input operations You can read a single analog input channel or read multiple analog input channels the digital input port and or the counter timer channels through the channel gain list Triggered scan mode You can cycle through the analog input channel list using triggered scan mode allowing you to scan the channel gain list up to 256 times Analog output subsystem Two 16 bit streaming D A converters Output rate up to 150 kSamples s Output range of 10 V Output channel list Overview Single value and continuous analog output operations You can update a single analog output channel or continuously update both analog output channels and the digital output port through the output channel list Waveform generation mode You can continuously output a waveform of up to 16K samples to the output channels using waveform generation mode Digital I O subsystem One digital input port cons
75. es Yes Yes Twos Complement Support SupportsTwosCompEncoding Returns Floating Point Values ReturnsFloats 98 Supported Device Driver Capabilities Channels Gain Table 14 DT9818 Channel Options DT9818 A D D A DIN DOUT C T QUAD Number of Channels 21 or NumberOfChannels 378 gb 1 1 1 0 SE Support SupportsSingleEnded Yes SE Channels MaxSingleEndedChannels 32 0 0 0 0 0 DI Support SupportsDifferential Yes Yes Yes Yes Yes DI Channels MaxDifferentialChannels 16 2 1 1 1 0 Maximum Channel Gain List Depth CGLDepth 1024 3 1 1 0 0 Simultaneous Sample and Hold Support SupportsSimultaneousSampleHold Channel List Inhibit SupportsChannelListlnhibit Yes a The DT9818 32 OEM supports 32 single ended or 16 differential channels the DT9818 OEM supports 16 single ended or 8 differential channels the DT9818 16SE BNC supports 16 single ended channels and the DT9818 8DI BNC supports 8 differential channels In addition you can read the digital input port and counter timer channels through the analog input channel list The channel numbers for the digital input port and the counter timer channels depend on the module you are using Refer to page 68 and page 69 or more information b Channels 0 and 1 are the analog output channels channel 2 is the digital output port Table 15 DT9818 Gain Options DT9818 A D D A DIN DOU
76. f connecting pulse output signals to the DT9818 OEM or DT9818 32 OEM module using counter timer 0 Refer to page 92 for more information on pulse output rate generation one shot and repetitive one shot operations DT9818 OEM or i enon P DT9818 32 OEM J3 Connector Heater 3 1 Controller poo 0000000000000 poo 1000000000000 43 42 40 35 Aa C TO Gate External Gating Switch Digital Ground Digital Ground Figure 23 Connecting Counter Timer Signals for Pulse Output Operations Shown for C TO 49 Chapter 3 50 NL Verifying the Operation of a Module Running the Quick DataAcq Application ccs oscedo ni ie mme 53 Testing omple yalue Analog Input as ck ice eds on A Seba en ERE SRI e Ee oe Fer ned 54 Testing single Value Analog Output asia di mne tte tere elle 55 Testing Continuos Analog Input oce er eet e RE bee eee ie 56 Testing Sing leValue Mie tal TPE o denen RR Hm Dee ERE eee tg 57 Testing omete Yalue Digital Cial commit eer eem temen eme etes 58 Testing Frequency Measurement 6060 cesses oer re ra he ad eren 59 Testne Pulse COUIpUE eoe eee eee SE ese ce PE eene ote Facete end petes Mee deat 60 51 Chapter 4 Set Up and Install the Module see Chapter 2 starting on page 23 Wire Signals see Chapter 3 starting on page 31 Verify the Operation of the Module this chapter You can verify the operat
77. f the total pulse output period is the active portion of the counter timer pulse output signal You specify the pulse output type in software The duty cycle or pulse width indicates the percentage of the total pulse output period that is active For example a duty cycle of 50 indicates that half of the total pulse output is low and half of the total pulse output is high You specify the duty cycle in software Figure 31 illustrates a low to high pulse with a duty cycle of approximately 30 Active Pulse Width a high pulse low pulse leg o Total Pulse Period Figure 31 Example of a Low to High Pulse Output Type Counter Timer Operation Modes DT9818 modules support the following counter timer operation modes Event counting Up down counting Frequency measurement Edge to edge measurement Continuous edge to edge measurement Rate generation One shot 89 Chapter 5 e Repetitive one shot Note The active polarity for each counter timer operation mode is software selectable The following subsections describe these modes in more detail Event Counting Use event counting mode if you want to count the number of rising edges that occur on the Counter n Clock input when the Counter n Gate signal is active low level or high level Refer to page 88 for information about specifying the active gate type You can count a maximum of 4 294 967 296 events before the counter
78. g Recommendations e een 33 Wiring to the DT9818 OEM or DT9818 32 OEM Module ooooccoccccccnc o 33 Wiring to an EP353 Accessory Panel ssss ee 34 Wiring to an EP355 Screw TerminalPanel sees 35 Wiring to an EP356 Accessory Panel ooooooooocccccccccccccco eee 36 Connecting Analog Input Signals ooooccoccccccccccccrccor eh 37 Connecting Single Ended Voltage Inputs oooocoooococccconnorrrac 37 Connecting Pseudo Differential Voltage Inputs ooococcoccccnrnrrrrcccc 38 Connecting Differential Voltage Inputs 0 000 38 Connecting Current Loop Inputs 66 ee 41 Connecting Analog Output Signals sss ee 42 Connecting Digital I O Signals 0 0 43 Connecting Counter Timer Signals 00 6 ccc eee nes 44 Event COUDUng ess teo os Ld e eet eer ed career b o ud 44 Up Down Counting 5 esr een et dee bte hee ebbe 45 Frequency Measurement eee ARE Mee a Reed 46 Contents Period Pulse Width Measurement 0 0 0 0 cc cee cece eee n 46 Edge to Edge Measurement noii irn non e e o a E a e p 47 Continuous Edge to Edge Measurement 00 0 000 e eee eee 48 Connecting Pulse Output Signals sss 49 Chapter 4 Verifying the Operation of a Module lsul 51 Running the Quick DataAcq Application n susunu urnur runar ee 53 Testing Single Value Analog Input lsssssssss e eee 54 Testing Single
79. g operation the counter counts the number of rising edges that occur on the C TO Clk In signal when the operation starts DT9818 OEM or f o DT9818 32 OEM C TO CIk In J3 Connector gt Sid DODO 000000000000 Source DODO 000000000000 40 35 Digital Ground Figure 17 Connecting Counter Timer Signals for an Event Counting Operation Shown for C TO with a Software Gate Up Down Counting Figure 18 shows how to connect counter timer signals to a DT9818 OEM or DT9818 32 OEM module to perform an up down counting operation on counter timer 0 In this example the counter keeps track of the number of rising edges that occur on the C TO Clk In signal The counter increments when the C TO Gate signal is high and decrements when the C TO Gate signal is low Refer to page 90 for more information on up down counting operations DT9818 OEM or DT9818 32 OEM J3 Connector 10 1 000 0000000000000 OOO DODD DODODDDO 43 40 35 C T 0 CIk In Up Down gt Signal Source Digital Ground C TO Gate Figure 18 Connecting Counter Timer Signals for an Up Down Counting Operation Shown for C TO 45 Chapter 3 46 Frequency Measurement One way to measure frequency is to connect a pulse of a known duration such as a one shot output of counter timer 1 to the gate input signal of the counter Figure 19 shows how to connect counter timer sign
80. g parameters Dataflow as Continuous Triggered scan mode enabled Theinitial trigger the trigger source that starts the operation as any of the supported trigger sources Retrigger source as either the external positive digital TTL trigger or the external negative digital TTL trigger The number of times to scan per trigger or retrigger also called the multiscan count Input Triggers A trigger is an event that occurs based on a specified set of conditions Acquisition starts when the module detects the initial trigger event and stops when all the allocated buffers have been filled or when you stop the operation If you are using triggered scan mode the module continues to acquire data using the specified retrigger source to clock the operation Refer to page 74 for more information about triggered scan mode The DT9818 module supports the following trigger sources Software trigger A software trigger event occurs when you start the analog input operation the computer issues a write to the module to begin conversions Using software specify the trigger source as a software trigger External digital TTL trigger An external digital TTL trigger event occurs when the DT9818 module detects a transition rising edge or falling edge on the External ADC Trigger input signal connected to the module Using software specify the trigger source as an external positive digital TTL trigger for a rising edge dig
81. has the smallest effective range that includes the signal you want to measure For example if the range of your analog input signal is 1 05 V specify a range of 10 V to 10 V for the module and use a gain of 8 for the channel the effective input range for this channel is then 1 25 V which provides the best sampling accuracy for that channel The simplest way to specify gain for a single channel is to specify the gain for a single value analog input operation using software refer to page 72 for more information on single value operations If you are using an input channel gain list use software to specify the gain for each analog input channel in the input channel gain list refer to page 67 for an example Note If you specified the digital input port or the counter timer channels in the channel gain list specify a gain of 1 for these channels 71 Chapter 5 Input Sample Clock Sources DT9818 module allows you to use one of the following clock sources to pace analog input operations Internal A D clock Using software specify the clock source as internal and the clock frequency at which to pace the operation The minimum frequency supported is 0 75 Samples s the maximum frequency supported is 150 kSamples s According to sampling theory Nyquist Theorem specify a frequency that is at least twice as fast as the input s highest frequency component For example to accurately sample a 20 kHz signal specify a samp
82. he bridge supply must be returned to analog ground DT9818 OEM or DT9818 32 OEM A J2 Connector 34 Analog In 0 900000 Floating d Signal Rs qQaoooooc Source N 68 67 EN Analog In 0 Return i Analog Ground We recommend that you software select 10 kQ of resistance to connect the low side of channel 0 to analog ground a physical resistor is not required Refer to page 29 for more information B DT9818 OEM or DT9818 32 OEM J2 Connector 00000 D D D D D 68 67 Bridge Analog In 0 sg Analog In 0 Return Analog Ground DC Supply Figure 10 Connecting Differential Voltage Inputs Shown for Channel 0 to a DT9818 OEM or DT9818 32 OEM Module 39 Chapter 3 40 Note that since they measure the difference between the signals at the high and low 3 inputs differential connections usually cancel any common mode voltages leaving only the signal However if you are using a grounded signal source and ground loop problems arise connect the differential signals to the DT9818 OEM or DT9818 32 OEM module as shown in Figure 11 In this case make sure that the low side of the signal 3 is connected to ground at the signal source not at the module and do not tie the two grounds together DT9818 OEM or DT9818 32 OEM J2 Connector ig Analog In 0 jo 00000 Grounded Pea Signal Es Qpaeooodo
83. ied clock rate The module recycles the data allowing you to output the same pattern continuously When it reaches the end of the FIFO the module returns to the first location of the FIFO and continues outputting the data This process continues indefinitely until you stop it To select waveform generation mode use software to specify the following parameters Specify the data flow as Continuous Specify WrapSingleBuffer as True to use a single buffer Specify the clock source and clock frequency refer to page 80 for more information Specify the trigger source refer to page 80 for more information 83 Chapter 5 Data Format and Transfer Data from the host computer must use offset binary data encoding for analog output signals such as 0000 to represent 40 V and FFFFh to represent 10 V Using software specify the data encoding as binary Before you begin writing data to the output channels you must allocate and fill buffers with the appropriate data An event is generated whenever a buffer is output This allows you to output additional data as needed Error Conditions The DT9818 module can report an error if one of the following conditions occurs Output FIFO Underflow The output channel gain list data is not being sent from the host fast enough This error is reported if an output sample clock pulse occurs while the output channel gain list is empty Note that if no new data is available to be output by eithe
84. ified level While the pulse output operation is enabled the counter outputs a pulse of the specified type and frequency continuously As soon as the operation is disabled rate generation stops Principles of Operation The period of the output pulse is determined by the C T clock source either internal using a clock divider or external You can output pulses using a maximum frequency of 1 MHz this is the frequency of the Counter n Out signal Refer to page 88 for more information about the C T clock sources Note Due to the isolation circuitry of the hardware the duty cycle of the output pulse is affected as the frequency increases above 10 kHz therefore you may not achieve the duty cycle you expect Using software specify the counter timer mode as rate generation rate the C T clock source as either internal or external the clock divider for an internal clock the polarity of the output pulses high to low transition or low to high transition the duty cycle of the output pulses and the active gate type low level or high level Refer to page 89 for more information about pulse output signals and to page 88 for more information about gate types Make sure that the signals are wired appropriately Refer to page 49 for an example of connecting a rate generation application One Shot Use one shot mode to generate a single pulse output signal from the Counter n Out line when the specified edge is detected on the Cou
85. ild drag and drop test and measurement applications for Data Translation data acquisition devices DT Open Layers for NET User s Manual UM 22161 For programmers who are developing their own application programs using Visual Cft or Visual Basic NET this manual describes how to use the DT Open Layers for NET Class Library to access the capabilities of Data Translation data acquisition devices DataAcq SDK User s Manual UM 18326 For programmers who are developing their own application programs using the Microsoft C compiler this manual describes how to use the DT Open Layers DataAcq SDK to access the capabilities of Data Translation data acquisition devices About this Manual DTx EZ Getting Started Manual UM 15428 This manual describes how to use the ActiveX controls provided in DTx EZ to access the capabilities of Data Translation data acquisition devices in Microsoft Visual Basic or Visual C DAQ Adaptor for MATLAB UM 22024 This document describes how to use Data Translation s DAQ Adaptor to provide an interface between the MATLAB Data Acquisition subsystem from The MathWorks and Data Translation s DT Open Layers architecture LV Link Online Help This help file describes how to use LV Link with the LabVIEW graphical programming language to access the capabilities of Data Translation data acquisition devices Microsoft Windows XP Windows Vista or Windows 7 documentation USB web site http
86. ing a Precision Voltage Source To calibrate the analog input circuitry you need to connect an external precision voltage source that is capable of providing 9 3750 V to the DT9818 module as follows 1 Connect the precision voltage source to Analog In 0 AD Ch0 2 Connect Analog In 1 AD Ch1 to Analog Input 1 Return Using the Auto Calibration Procedure Auto calibration is the easiest to use and is the recommended calibration method To auto calibrate the analog input subsystem do the following 1 Select the A D Configuration tab of the DT9818 Calibration Utility 2 Set the voltage supply on AD Ch0 to 0 V 3 Click Start Auto Calibration A message appears notifying you to verify that 0 V is applied to AD Ch0 4 Check that the supplied voltage to AD Ch0 is 0 V and then click OK The offset value is calibrated When the offset calibration is complete a message appears notifying you to set the input voltage of AD Ch 0 to 49 375 V 5 Check that the supplied voltage to AD CHO is 9 375V and then click OK The gain value is calibrated completing the calibration process Note At any time you can click Restore Factory Settings to reset the A D calibration values to their original factory settings This process will undo any auto or manual calibration settings Using the Manual Calibration Procedure If you want to manually calibrate the analog input circuitry instead of auto calibrating it do the following 1 Adjust the off
87. inuous Triggered scan mode usage enabled The initial trigger the trigger source that starts the acquisition e Retrigger source as Software The number of times to scan per trigger or retrigger also called the multiscan count The frequency of the retrigger clock Externally Retriggered Scan Mode In externally retriggered scan mode the module waits for the initial trigger to occur When it detects an initial trigger the module scans the input channel gain list up to 256 times and then waits for an external retrigger to occur When the retrigger occurs the module scans the input channel gain list the specified number of times and then waits for another external digital TTL trigger to occur The process repeats continuously until either the allocated buffers are filled or you stop the operation refer to page 76 for more information about buffers The conversion rate of each channel is determined by the frequency of the input sample clock refer to page 72 for more information about the input sample clock The conversion rate of each scan is determined by the period between external retriggers therefore it cannot be accurately controlled The module ignores external triggers that occur while it is acquiring data Only external retrigger events that occur when the module is waiting for a retrigger are detected and acted on 75 Chapter 5 76 To select externally retriggered scan mode use software to specify the followin
88. ion of a DT9818 module using the Quick DataAcq application Quick DataAcq lets you do the following Acquire data from a single analog input channel or digital input port Acquire data continuously from one or more analog input channels using an oscilloscope strip chart or Fast Fourier Transform FFT view Measure the frequency of events Output data from a single analog output channel or digital output port Output pulses either continuously or as a one shot Save the input data to disk The Quick DataAcq application is installed automatically when you install the driver software 52 Verifying the Operation of a Module Running the Quick DataAcq Application To run the Quick DataAcq application do the following 1 If you have not already done so power up your computer and any attached peripherals 2 Click Start from the Task Bar 3 Browse to Programs Data Translation Inc DT Open Layers for Win32 QuickDataAcq The main menu appears Note The Quick DataAcq application allows you to verify basic operations on the board however it may not support all of the board s features For information on each of the features provided use the online help for the Quick DataAcq application by pressing F1 from any view or selecting the Help menu If the system has trouble finding the help file navigate to C Program Files Data Translation Win32 dtdataacq hlp where C is the letter of your hard disk drive 53 Chapter 4
89. isting of 8 digital input lines You can read the value of the digital input port using the analog input channel gain list One digital output port consisting of 8 digital output lines You can update the value of the digital output port using the output channel list Two 32 bit counter timer C T channels that perform event counting up down counting frequency measurement edge to edge measurement continuous edge to edge measurement continuous pulse output one shot and repetitive one shot operations You can read the value of the C T channels using the analog input channel gain list Internal or external clock source for pacing analog input and analog output operations with a maximum frequency of 150 kHz Internal or external trigger source for starting analog input and analog output operations 500 V galvanic isolation barrier that prevents ground loops to maximize analog signal integrity and protect your computer 17 Chapter 1 18 Supported Software The following software is available for use with the DT9818 module and is on the Data Acquisition OMNI CD DT9818 Device Driver The device driver allows you to use a DT9818 module with any of the supported software packages or utilities Quick DataAcq application The Quick DataAcq application provides a quick way to get up and running using a DT9818 module Using this application you can verify key features of the modules display data on the screen and save data
90. ital input port in the input channel gain list to perform a continuous digital input operation see page 68 for more information You can also specify the entire digital output port in an output channel gain list to perform a continuous digital output operation see page 78 for more information A digital line is high if its value is 1 a digital line is low if its value is 0 On power up or reset a low value 0 is output from each of the digital output lines Note You can use pin 2 of the J3 connector to provide 5 V to the digital I O lines allowing the digital output lines to maintain their states if the USB cable is unplugged Operation Modes The DT9818 module supports the following digital I O operation modes Single value operations are the simplest to use but offer the least flexibility and efficiency You use software to specify the digital I O port and a gain of 1 the gain is ignored Data is then read from or written to all the digital I O lines For a single value operation you cannot specify a clock or trigger source Single value operations stop automatically when finished you cannot stop a single value operation 85 Chapter 5 Continuous digital I O takes full advantage of the capabilities of the DT9818 module You can specify a clock source scan mode trigger source buffer and buffer wrap mode for the operation Digital input For digital input operations enter the digital input port all 8
91. ital trigger or an external negative digital TTL trigger for a falling edge digital trigger Data Format and Transfer DT9818 module uses offset binary data encoding such as 0000 to represent negative full scale and FFFFh to represent positive full scale Use software to specify the data encoding as binary The ADC outputs FFFFh for above range signals and 0000 for below range signals Before you begin acquiring data you must allocate buffers to hold the data An event is returned whenever a buffer is filled This allows you to move and or process the data as needed We recommend that you allocate a minimum of two buffers for analog input operations Data is written to multiple allocated input buffers continuously when no more empty buffers are available the operation stops The data is gap free Principles of Operation Error Conditions The DT9818 module can report an error if one of the following conditions occurs e A D Over Sample The A D sample clock rate is too fast This error is reported if a new A D sample clock pulse occurs while the ADC is busy performing a conversion from the previous A D sample clock pulse The host computer can clear this error To avoid this error use a slower sampling rate Input FIFO Overflow The analog input data is not being transferred fast enough to the host computer The host computer can clear this error but the error will continue to be generated if the Input FIFO is still full
92. italEventTrigger Clocks 102 Table 21 DT9818 Clock Options DT9818 Internal Clock Support SupportsinternalClock A D Yes D A Yes DIN Yes DOUT Yes C T Yes QUAD External Clock Support SupportsExternalClock Yes Yes Yes Simultaneous Input Output on a Single Clock Signal SupportsSimultaneousClocking Yes Base Clock Frequency BaseClockFrequency 48 MHz 48 MHz 48 MHz Maximum Clock Divider MaxExtClockDivider 4 294 967 295 Minimum Clock Divider MinExtClockDivider Maximum Frequency MaxFrequency 150 kHz 150 kHz 1 MHz Minimum Frequency MinFrequency 0 75 Hz 0 75 Hz 0 011176 Hz Supported Device Driver Capabilities Counter Timers Table 22 DT9818 Counter Timer Options DT9818 A D D A DIN DOUT C T QUAD Cascading Support SupportsCascading Event Count Mode Support SupportsCount Yes Generate Rate Mode Support SupportsRateGenerate Yes One Shot Mode Support SupportsOneShot Yes Repetitive One Shot Mode Support SupportsOneShotRepeat Yes Up Down Counting Mode Support SupportsUpDown Yes Edge to Edge Measurement Mode Support SupportsMeasure Yes Continuous Edge to Edge Measurement Mode Support SupportsContinuousMeasure Yes High to Low Output Pulse Support SupportsHighToLowPulse Yes Low to High Output Pulse Support SupportsLo
93. k input When the start edge is detected the counter timer starts incrementing and continues incrementing until the stop edge is detected The C T then stops incrementing until it is enabled to start another measurement When the operation is complete you can read the value of the counter You can use edge to edge measurement to measure the following Pulse width of a signal pulse the amount of time that a signal pulse is in a high or a low state or the amount of time between a rising edge and a falling edge or between a falling edge and a rising edge You can calculate the pulse width as follows Pulse width Number of counts 48 MHz 91 Chapter 5 92 Period of a signal pulse the time between two occurrences of the same edge rising edge to rising edge or falling edge to falling edge You can calculate the period as follows Period 1 Frequency Period Number of counts 48 MHz Frequency of a signal pulse the number of periods per second You can calculate the frequency as follows Frequency 48 MHz Number of Counts Using software specify the counter timer mode as edge to edge measurement mode measure the C T clock source as internal the start edge type and the stop edge type Make sure that the signals are wired appropriately Refer to page 47 for an example of connecting an edge to edge measurement application Continuous Edge to Edge Measurement In continuous edge to edge measurem
94. l Ground 7 C T1 Out 41 C T1 Gate 8 C T1 Clk In 42 Digital Ground 9 C TO Out 43 C TO Gate 10 C TO Clk In 44 Digital Ground 11 Digital Ground 45 Reserved 12 Reserved 46 Reserved 13 Reserved 47 Reserved 14 Reserved 48 Reserved 15 Reserved 49 Reserved 16 Reserved 50 Reserved 134 Connector Pin Assignments Table 36 Pin Assignments for Connector J3 on the DT9818 OEM and DT9818 32 OEM Modules cont Pin Signal Description Pin Signal Description 17 Reserved 51 Reserved 18 Reserved 52 Reserved 19 Reserved 53 Reserved 20 Digital In 7 54 Digital Out 7 21 Digital In 6 55 Digital Out 6 22 Digital In 5 56 Digital Out 5 23 Digital In 4 57 Digital Out 4 24 Digital In 3 58 Digital Out 3 25 Digital In 2 59 Digital Out 2 26 Digital In 1 60 Digital Out 1 27 Digital In 0 61 Digital Out 0 28 External ADC Clock 62 External ADC Trigger 29 External DAC Clock 63 External DAC Trigger 30 Digital Ground 64 Digital Ground 31 Reserved 65 Reserved 32 Reserved 66 Reserved 33 Analog Out 1 67 Analog Out 1 Return 34 Analog Out 0 68 Analog Out 0 Return a Youcan use this signal to supply 5 V to the digital I O allowing the digital output signals to maintain their states if the USB cable is unplugged 135 Appendix B EP353 Accessory Panel Pin Assignments This section describes the pin assignments for the connectors on the EP353 accessory panel Conne
95. le this screw terminal panel provides 14 position screw terminal blocks for attaching analog input signals When plugged into connector J3 of the module this screw terminal panel provides 14 position screw terminal blocks for attaching analog output counter timer digital I O trigger and clock signals Refer to page 35 for more information about attaching the EP355 to the module refer to page 139 for screw terminal assignments e EP356 This accessory panel plugs into connector J3 of the module It provides two 37 pin D sub connectors Use connector J1 of the EP356 to attach digital I O signals and use connector J2 of the EP356 to attach analog output counter timer trigger and clock signals Refer to page 36 for more information about attaching the EP356 accessory panel to the module refer to page 144 for connector pin assignments Wiring to an EP353 Accessory Panel To attach an EP353 accessory panel to the DT9818 OEM or DT9818 32 OEM module plug the EP353 panel into connector J2 on the module as shown in Figure 5 EP353 Accessory Panel 26 Pin Connector J1 DT9818 OEM or 37 Pin DT9818 32 OEM Connector J2 pr gt Module Connector J2 ay come J3 Figure 5 Connecting the EP353 Accessory Panel to Connector J2 on the DT9818 OEM or DT9818 32 OEM Module You can access the pins on connector J1 of the EP353 panel by building your own cable panel 34 Wiring Signals You can access the pins on connector J
96. ling frequency of at least 40 kHz Doing so avoids an error condition called aliasing in which high frequency input components erroneously appear as lower frequencies after sampling External A D clock An external A D clock is useful when you want to pace acquisitions at rates not available with the internal A D clock or when you want to pace at uneven intervals Connect an external A D clock to the External ADC Clock input signal on the DT9818 module Conversions start on the falling edge of the external A D clock input signal Using software specify the clock source as external The clock frequency is always equal to the frequency of the external A D sample clock input signal that you connect to the module Note If you specify the digital input port and or the counter timer channels in the input channel gain list the input sample clock internal or external also paces the acquisition of the digital input port and or counter timer channels Refer to page 68 and page 69 for more information about specifying these channels Analog Input Conversion Modes DT9818 module supports the following conversion modes Single value operations are the simplest to use Using software you specify the range gain and analog input channel The module acquires the data from the specified channel and returns the data immediately For a single value operation you cannot specify a clock source trigger source scan mode or buffer Single
97. llows 1 Set up one of the counter timers for one shot mode specifying the clock source as internal the clock frequency the gate type that enables the operation as rising edge or falling edge and the polarity of the output pulse as high to low transition or low to high transition of the output pulse Set up the counter timer that will measure the frequency for event counting mode specifying the type of clock pulses to count and the gate type this should match the pulse output type of the counter timer set up for one shot mode Start both counters pulses are not counted until the active period of the one shot pulse is generated Read the number of pulses counted Allow enough time to ensure that the active period of the one shot occurred and that events have been counted Determine the measurement period using the following equation Measurement period 1 Active Pulse Width Clock Frequency Determine the frequency of the clock input signal using the following equation Frequency Measurement _Number of Events Measurement Period Edge to Edge Measurement Use edge to edge measurement mode if you want to measure the time interval between a specified start edge and a specified stop edge The start edge and the stop edge can occur on the rising edge of the Counter n Gate input the falling edge of the Counter n Gate input the rising edge of the Counter n Clock input or the falling edge of the Counter n Cloc
98. lso specify a single channel or the same channel more than once in the list Using software specify the channels in the order you want to sample them You can enter up to 1024 entries in the channel gain list The channels are read in order using continuously paced scan mode or triggered scan mode from the first entry to the last entry in the channel gain list Refer to page 72 for more information on the supported conversion modes Table 3 shows an example of entering analog input channels in the channel gain list Refer to page 71 for more information about specifying the gain for a channel Table 3 An Example of Specifying Analog Input Channels in the Input Channel Gain List Channel Gain List Entry Channel Gain Operation Description 0 0 1 AINO Read analog input channel 0 using a gain of 1 input range of 10 V 1 3 2 AIN3 Read analog input channel 3 using a gain of 2 input range of 5 V 2 0 1 AINO Read analog input channel 0 again using a gain of 1 input range of 10 V 3 6 4 AIN6 Read analog input channel 6 using a gain of 4 input range of 2 5 V 1023 1 8 AIN1 Read analog input channel 1 using a gain of 8 input range of 1 25 V Note that in addition to the analog input channels you can include the digital input port see page 68 and or counter timer channels see page 69 in the input channel gain list The maximum rate at which the module can read the channels in
99. modules Table 31 Power Physical and Environmental Specifications Feature Specifications Power 5 V 5 500 mA maximum Physical Dimensions 190 mm x 100 mm x 20 mm Weight 4 6 ounces Environmental Operating temperature range 0 Cto 55 C Storage temperature range 25 C to 85 C Relative humidity To 95 noncondensing Altitude to 10 000 feet 126 Specifications Connector Specifications Table 32 lists the mating cable connectors for the connectors on the DT9818 module Table 32 Mating Cable Connectors Part Number on Module Mating Cable Module Panel Connector or Equivalent Connector DT9818 J2 AMP Tyco 6 104068 8 AMP Tyco 3 111196 4 J3 AMP Tyco 6 104068 8 AMP Tyco 3 111196 4 EP353 J1 AMP Tyco 5102321 6 AMP Tyco 1658622 6 accessory panel J2 AMP Tyco 5747375 8 AMP Tyco 5 747917 2 EP356 J1 AMP Tyco 5747301 8 AMP Tyco 5 747916 2 accessory panel J2 AMP Tyco 5747301 8 AMP Tyco 5 747916 2 BNC connection Analog input AMP Tyco AMP 5747375 8 AMP Tyco 5 747917 2 box Digital I O AMP Tyco 5747301 8 AMP Tyco 5 747916 2 CT DAC AMP Tyco 5747301 8 AMP Tyco 5 747916 2 Clk Trig a The mating PCB receptacle is AMP Tyco 6 104078 3 127 Appendix A 128 Regulatory Specifications Table 33 lists the regulatory specifications for the DT9818 module Table 33 Regulatory Specifications Feature Specifications Emi
100. n D sub connectors The number of BNC connectors available on the box varies depending on the version of the box that you are using For example the DT9818 16SE BNC version shown in Figure 39 contains 22 BNC connectors 16 BNC connectors for single ended analog inputs two BNC connectors for analog outputs and four BNC connectors for external clocks and triggers The DT9818 8DI BNC version contains 14 BNC connectors 8 BNC connectors for single ended analog inputs two BNC connectors for analog outputs and four BNC connectors for external clocks and triggers o O AD Ch12 AD Ch13 AD Ch14 ADCh15 DAC Ch0 DAC Clock a O O M AD Ch8 ADCh9 ADCh10 AD Ch11 DAC Ch1 AD Clock 2 x a O e ls 2 ADCh4 ADCh5 ADCh6 ADCh7 DAC Trig 3 a E ale 5 O a 5 ADCh0 ADCh1 ADCh2 ADCh3 AD Trig O O Figure 39 BNC Connection Box You can wire the following signals to the BNC box Analog input signals You can wire analog input signals in one of the following ways Using the BNC connectors labelled AD Ch0 to AD Ch15 Using the appropriate pins on the Analog Input connector You can access the pins either by using the EP360 cable and STP37 screw terminal panel available from Data Translation by plugging in a 37 mating connector AMP 5 747917 2 or by building your own cable panel Refer to page 152 for conn
101. n OMNI CD If an item is missing or damaged contact Data Translation If you are in the United States call the Customer Service Department at 508 481 3700 An application engineer will guide you through the appropriate steps for replacing missing or damaged items If you are located outside the United States call your local distributor listed on Data Translation s web site www datatranslation com Once you have unpacked your module attach the module to the computer as described in the next section 25 Chapter 2 Attaching Modules to the Computer This section describes how to attach DT9818 modules to the host computer Note Most computers have several USB ports that allow direct connection to USB devices If your application requires more DT9818 modules than you have USB ports for you can expand the number of USB devices attached to a single USB port by using expansion hubs For more information refer to page 27 You can unplug a module then plug it in again if you wish without causing damage This process is called hot swapping Your application may take a few seconds to recognize a module once it is plugged back in You must install the device driver before connecting your DT9818 module s to the host computer Connecting Directly to the USB Ports To connect a DT9818 module directly to a USB port on your computer do the following 1 Make sure that you have attached a power supply to the module 2 Attach
102. n each table lists all possible subsystem capabilities A description of each capability is followed by the property used to describe that capability in the DT Open Layers for NET Class Library Note Blank fields represent unsupported options For more information refer to the description of these properties in the DT Open Layers for NET Class Library online help or DT Open Layers for NET Class Library User s Manual 96 Supported Device Driver Capabilities Data Flow and Operation Options Table 10 DT9818 Data Flow and Operation Options DT9818 A D D A DIN DOUT C T QUAD Single Value Operation Support SupportsSingleValue Yes Yes Yes Yes Yes Simultaneous Single Value Output Operations SupportsSetSingleValues Continuous Operation Support SupportsContinuous Yes Yes Yes Yes Yes Continuous Operation until Trigger SupportsContinuousPreTrigger Continuous Operation before amp after Trigger SupportsContinuousPrePostTrigger Waveform Operations Using FIFO Only SupportsWaveformModeOnly Simultaneous Start List Support SupportsSimultaneousStart Yes Yes Supports Programmable Synchronization Modes SupportsSynchronization Synchronization Modes SynchronizationMode Interrupt Support SupportsinterruptOnChange Output FIFO Size FifoSize 16K Auto Calibrate Support SupportsAutoCalibrate a The DIN subsystem supports continuous mode by allowi
103. nalog In 9 DI Return Analog In 25 SE 51 TB5 Analog Ground 52 TB6 Analog In 8 DI Return Analog In 24 SE 53 TB6 Analog Ground 54 TB6 Analog In 7 DI Return Analog In 15 SEP 55 TB7 Analog Ground 56 TB7 Analog In 6 DI Return Analog In 14SE 57 TB7 Analog Ground 58 TB7 Analog In 5 DI Return Analog In 13 SEP 59 TB8 Analog Ground 60 TB8 Analog In 4 DI Return Analog In 12 SEP 61 TB8 Analog Ground 62 TB9 Analog In 3 DI Return Analog In 11 SEP 63 TB10 Analog Ground 64 TB10 Analog In 2 DI Return Analog In 10 SEP 65 TB10 Analog Ground 66 TB9 Analog In 1 DI Return Analog In 9 SEP 67 TB9 Analog Ground 68 TB9 Analog In 0 DI Return Analog In 8 SEP a These screw terminals are used for the DT9818 32 OEM module only The first signal description applies to the differential configuration the second signal description applies to the single ended configuration b These screw terminals are used for the DT9818 OEM and DT9818 32 OEM modules The first signal description applies to the differential configuration the second signal description applies to the single ended configuration 141 Appendix B EP355 Screw Terminal Assignments when Attached to Connector J3 on the Module Table 40 lists the screw terminal assignments when the EP355 panel is attached to connector J3 on the DT9818 OEM or DT9818 32 OEM module Table 40 Screw Terminal Assignments on the EP355 Screw Terminal Panel When Attached to Connector J3
104. ng of the list and repeats this process Data is acquired continuously 73 Chapter 5 Chano Chan2 ChanO Chan2 ChanO Chan2 ChanO Chan 2 Chan 1 Chan 1 Chan 1 Chani Input Sample Clock Data acquired continuously Initial trigger event occurs Figure 26 Continuous Scan Mode Triggered Scan Mode Use triggered scan mode if you want to accurately control both the period between conversions of individual channels in a scan and the period between each scan This mode is useful in emulating simultaneous sample and hold and trigger per buffer operations You can acquire up to 262 144 samples per trigger 256 times per trigger x 1024 location channel gain list Figure 27 shows the timing diagram of a triggered scan operation Trigger E ues Sample Clock aped OCT m PON EU ADM Gain List a Entry In triggered scan mode the period between scans is determined by the trigger Figure 27 Timing Diagram for a Triggered Scan Operation DT9818 module supports two triggered scan modes software retriggered and externally retriggered These modes are described in the following subsections Software Retriggered Scan Mode In software retriggered scan mode the module waits for the initial trigger to occur When it detects an initial trigger the module scans the input channel gain list a specified number
105. ng you to read the digital input port all 8 digital input lines using the analog input channel list b The DOUT subsystem supports continuous mode by allowing you to output data from the digital output port all 8 digital output lines using the output channel list c The C T subsystem supports continuous mode by allowing you to read the value of one or more of the two counter timer channels using the analog input channel list 97 Chapter 6 Buffering Table 11 DT9818 Buffering Options DT9818 A D D A DIN DOUT C T QUAD Buffer Support SupportsBuffering Yes Yes Single Buffer Wrap Mode Support SupportsWrapSingle Yes Inprocess Buffer Flush Support SupportsinProcessFlush Yes Triggered Scan Mode Table 12 DT9818 Triggered Scan Mode Options DT9818 A D D A DIN DOUT C T QUAD Triggered Scan Support SupportsTriggeredScan Yes Maximum Number of CGL Scans per Trigger MaxMultiScanCount 2562 0 0 0 0 0 Maximum Retrigger Frequency MaxRetriggerFreq 75kHz 0 0 0 0 0 Minimum Retrigger Frequency MinRetriggerFreq 0 75 Hz O 0 0 0 0 a The channel list depth of 1024 entries in conjunction with a multiscan of 256 provides an effective channel list depth of up to 256K entries Data Encoding Table 13 DT9818 Data Encoding Options DT9818 A D D A DIN DOUT C T QUAD Binary Encoding Support SupportsBinaryEncoding Yes Yes Y
106. nput and Digital Output Specifications scoi eee ees 121 Counters Timer Specifications conoci bese ce eae ees 122 External Tagasr Dpecttioatlong ei ee Re Der det e E a be ier Cerdo Se ees 123 ternal Clock specified tons ois erreten ied eee A ANNO REY dde Y 124 Exiemal C nel Spec CODA eee ge Orr erm et echa e heces e aee s 125 Power Physical and Environment Specifications llsl en en en 126 Connector pecho HOS 2 dees teh Hed vb EAE RE ERU AIR ERE EUR E Ra 127 Remulatory Oped ica DONS 0 codec donde RE a dese tea e Ce eg 128 117 Appendix A Analog Input Specifications 118 Table 24 lists the specifications for the A D subsystem on the DT9818 module Table 24 A D Subsystem Specifications Feature Specifications Number of analog input channels Single ended Pseudo differential Differential 16 for DT9818 OEM and DT9818 16SE BNC 32 for DT9818 32 OEM and DT9818 32 STP 16 for DT9818 OEM and DT9818 16SE BNC 32 for DT9818 32 OEM and DT9818 32 STP 8 for DT9818 OEM and DT9818 8DI BNC 16 for DT9818 32 OEM and DT9818 32 STP Number of gains 4 1 2 4 8 Resolution Data encoding 16 bits Offset binary System accuracy to of FSR Gain 1 0 01 Gain 2 0 02 Gain 4 0 02 Gain 8 0 03 Range Gain 1 10V Gain 2 5 V Gain 4 2 5 V Gain 8 1 25 V Nonlinearity 3 LSBs Differential nonlinearity 2 LSBs monotonic to 15 bits
107. nter n Gate signal You can use this pulse output signal as an external digital TTL trigger to start other operations such as analog input or analog output operations After the single pulse is output the one shot operation stops All subsequent clock input signals and gate input signals are ignored The period of the output pulse is determined by the C T clock source either internal using a clock divider or external Refer to page 88 for more information about the C T clock sources Using software specify the counter timer mode as one shot the clock source and clock divider the polarity of the output pulse high to low transition or low to high transition and the active gate type rising edge or falling edge Refer to page 89 for more information about pulse output types and to page 88 for more information about gate types Note In the case of a one shot operation it is recommended that you set the duty cycle to 100 Due to the isolation circuitry of the hardware the width of the output pulse increases as the clock frequency increases above 10 kHz Therefore you may not achieve the pulse width you expect Make sure that the signals are wired appropriately Refer to page 49 for an example of connecting a one shot application 93 Chapter 5 94 Repetitive One Shot Use repetitive one shot mode to generate a pulse output signal from the Counter n Out line whenever the specified edge is detected on the Counte
108. o Oo Power Supply NN Expansion vd for Hub in Power Supply for Hub DT9818 Module DT9818 Module USB Cables Figure 3 Attaching Multiple DT9818 Modules Using Expansion Hubs Setting Up and Installing the Module Configuring the DT9818 Device Driver To configure the device driver for the DT9818 module do the following 1 2 3 9 If you have not already done so power up the host computer and all peripherals From the Windows Start menu select Settings Control Panel From the Control Panel double click Open Layers Control Panel The Data Acquisition Control Panel dialog box appears Click the DT9818 module that you want to configure and then click Advanced The Configurable Board Options dialog box appears If you are using differential analog input channels we recommend that you select the 10k Ohm A D Input Termination Resistor checkbox the default setting This ensures that 10 kQ of bias return termination resistance is used for the analog input channels Bias return termination resistance is particularly useful when your differential source is floating If you are using single ended analog input channels uncheck this box To use USB 2 0 select the USB 2 0 checkbox If this checkbox is not selected USB 1 1 is used instead Click OK If you want to rename the module click Edit Name enter a new name for the module and then click OK The name is used to identify the module in all subseq
109. oblems with the DT9818 module and device driver should they occur Chapter 8 Calibration describes how to calibrate the analog I O circuitry of the DT9818 module Appendix A Specifications lists the specifications of the DT9818 module Appendix B Connector Pin Assignments lists the pin assignments for the connectors on the DT9818 and on the supported accessory panels Appendix C BNC and STP Box Connections describes how to wire signals to the optional BNC connection box and lists the pin assignments for the connectors on the BNC connection box An index completes this manual Conventions Used in this Manual The following conventions are used in this manual Notes provide useful information or information that requires special emphasis cautions provide information to help you avoid losing data or damaging your equipment and warnings provide information to help you avoid catastrophic damage to yourself or your equipment Items that you select or type are shown in bold Related Information Refer to the following documents for more information on using the DT9818 module Benefits of the Universal Serial Bus for Data Acquisition This white paper describes why USB is an attractive alternative for data acquisition It is available on the Data Translation web site www datatranslation com Measure Foundry Manual UM 19298 and online help These documents describe how to use Measure Foundry to bu
110. of times up to 256 and then waits for a software retrigger to occur When it detects a software retrigger the module scans the input channel gain list the specified number of times and then waits for another software retrigger to occur The process repeats continuously until either the allocated buffers are filled or you stop the operation refer to page 76 for more information about buffers 74 Principles of Operation The sample rate is determined by the frequency of the input sample clock divided by the number of entries in the input channel gain list refer to page 72 for more information about the input sample clock The conversion rate of each scan is determined by the frequency of the retrigger clock on the module The minimum retrigger frequency supported is 0 75 Hz the maximum retrigger frequency supported is 75 kHz Specify the retrigger frequency as follows Min Retrigger of CGL entries x of CGLs per trigger 2 us Period A D sample clock frequency Max Retrigger 1 Frequency Min Retrigger Period For example if you are using 512 channels in the input channel gain list scanning the channel gain list 256 times every trigger or retrigger and using an A D sample clock witha frequency of 100 kHz set the maximum retrigger frequency to 0 762 Hz since 0 762 Hz 1 512 256 2 us 100 kHz To select software retriggered scan mode use software to specify the following parameters e Dataflow as Cont
111. on Box Q Analog Input D Analog In 0 o gt OS Os Signal lt Source Analog In 1 ale gt a Ole Ola rg NA je O s Note that the BNC connection box automatically connects the Analog Ground and Analog Input Return signals Oia O E appropriately lt lt Figure 42 Connecting Differential Inputs to the BNC Connection Box Connecting Analog Output Signals Figure 43 shows how to connect an analog output voltage signal channel 0 in this case to the BNC connection box BNC Connection Box Analog Out 0 DACO DACClock Q i DAC ADClock 2 Al Oo o E DAC2 DACTrig x O Q ss is Note that the BNC box automatically DAC3 ADTrig s E connects the Analog Ground signal A 6 appropriately 5 Figure 43 Connecting Analog Outputs to the BNC Connector Box 151 Appendix C Wiring Signals to the D Sub Connectors If you do not want to use the BNC connectors or if you want to connect digital I O or counter timer signals to the BNC connection box you can use the 37 pin D sub connectors These connectors are described in the following sections Refer to Chapter 3 starting on page 31 for wiring diagrams Analog Input Connector The Analog Input connector allows you to access the analog input signals Table 43 lists the pin assignments for
112. on hub do the following 1 2 Make sure that you have attached a power supply to the module Attach one end of the USB cable to the module and the other end of the USB cable to an expansion hub Connect the power supply for the expansion hub to an external power supply Connect the expansion hub to the USB port on the host computer using another USB cable The operating system automatically detects the USB module and starts the Found New Hardware wizard For Windows Vista a Click Locate and install driver software recommended The popup message Windows needs your permission to continue appears b Click Continue The Windows Security dialog box appears c Click Install this driver software anyway The LED on the module turns green For Windows XP a Click Next and or Finish as required in the wizard Once the firmware is loaded the wizard restarts to initiate the firmware to accept commands b Click Next and or Finish again The LED on the module turns green 27 28 Chapter 2 Note Windows 7 finds the device automatically 6 Repeat these steps until you have attached the number of expansion hubs and modules that you require Refer to Figure 3 The operating system automatically detects the USB devices as they are installed DT9818 Module DT9818 Module USB Cables ys Host Computer n p USB Cable USB Cable H
113. one end of the USB cable to the USB port on the module 3 Attach the other end of the USB cable to one of the USB ports on the host computer as shown in Figure 2 The operating system automatically detects the USB module and starts the Found New Hardware wizard DT9818 Modu USB Ports d Host Computer C USB Cable cug Figure 2 Attaching the Module to the Host Computer 4 For Windows Vista a Click Locate and install driver software recommended The popup message Windows needs your permission to continue appears 26 Setting Up and Installing the Module 5 b Click Continue The Windows Security dialog box appears c Click Install this driver software anyway The LED on the module turns green For Windows XP a Click Next and or Finish as required in the wizard Once the firmware is loaded the wizard restarts to initiate the firmware to accept commands b Click Next and or Finish again The LED on the module turns green Note Windows 7 finds the device automatically Repeat these steps to attach another DT9818 module to the host computer if desired Connecting to an Expansion Hub Expansion hubs are powered by their own external power supply The practical number of DT9818 modules that you can connect to a single USB port depends on the throughput you want to achieve To connect multiple DT9818 modules to an expansi
114. onlinearity 1 0 LSB Differential nonlinearity 1 0 LSB Inherent quantizing error 1 0 LSB Output range 10 V Error Zero Adjustable to 0 Gain Adjustable to 0 Drift Zero bipolar Gain 10 ppm of FSR C 30 ppm of FSR C Throughput 100 mV steps per DAC Waveform generation mode Continuously paced analog output mode 150 kSamples s per channel 150 kSamples s per channel FIFO 16 kSamples total Current output Output impedance 3 mA maximum load 0 1 2 maximum Capacitive driver capability 0 004 uF Protection Short circuit to analog ground Power on voltage O V 10 mV maximum Settling time to 0 0196 of FSR 6 0 us 100 mV steps 10 0 us 10 V steps Slew rate 10 V us Glitch energy 1 0 nV s typical ESD protection Arc 8kV Contact 4 kV Monotonicity 1 LSB Specifications Digital Input and Digital Output Specifications Table 26 lists the specifications for the DIN DOUT subsystems on the DT9818 module Table 26 DIN DOUT Subsystem Specifications Feature Specifications Number of digital I O lines 16 8 digital input 8 digital output Number of ports 2 8 bits each Input termination Inputs tied to 5 V through 22 kQ pull up resistors Input logic load High input voltage Low input voltage Low input current Logic family TTL 5 V tolerant Logic sense Positive true Inputs Input
115. onnector J1 on the DT9818 OEM and DT9818 32 OEM Modules Pin Signal Description Pin Signal Description 1 USB 5 V 3 USB Data 2 USB Data 4 USB Ground 131 Appendix B Connector J2 on the Module Figure 33 shows the orientation of the pins for connector J2 on the DT9818 OEM and DT9818 32 OEM modules Pin 34 Pin 1 Table 35 lists the pin assignments for connector J2 on the DT9818 OEM and DT9818 32 OEM 0000000000000000000000000 AA 0000000000000 000000000000000000000 Pin 68 k Pin 35 Figure 33 Orientation of the Pins for Connectors J2 and J3 on the DT9818 OEM and DT9818 32 OEM Modules modules Table 35 Pin Assignments for Connector J2 on the DT9818 OEM and DT9818 32 OEM Modules Pin Signal Description Pin Signal Description 1 5 V Analog 35 Digital Ground 2 Amplifier Low 36 Analog Ground 3 Analog Ground 37 Analog Ground 4 Analog Input 15 DI 38 Analog Input 15 DI Return Analog Input 23 SEP Analog In 31 SE 5 Analog Ground 39 Analog Ground 6 Analog Input 14 DI 40 Analog Input 14 DI Return Analog Input 22 SEP Analog In 30 SEP 7 Analog Ground 41 Analog Ground 8 Analog Input 13 DI 42 Analog Input 13 DI Return Analog Input 21 SEP Analog In 29 SEP 9 Analog Ground 43 Analog Ground 10 Analog Input 12 DI 44 Analog Input 12 DI Return Analog Input 20 SEP Analog In 28 SEP 11 Analog Ground 45 Analog Ground 12 Analog Input 11 DI 46 Analog Inp
116. ons Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la class A prescrites dans le R glement sur le brouillage radio lectrique dict par le Minist re des Communications du Canada Table of Contents About this Manual s assia a a ees 11 Intended Audiences doceo beber EE he PER EI RU ERE eed weed 11 How this Manual is Organized sssssss eh 11 Conventions Used in this Manual seer i 2 0 ira ieran eee eee tenn As 12 Related Information 2e ELE ee Pa eee eee lak Fi en ple oe eit 12 Where lo Get Help 4 5 caeco umen e ts de seinem Lees ida cb eth 13 Chapter 1 Overview oooooocccccon RR hh hn 15 DT9818 Hardware Features sssssseeseseeeee e eaea 16 Supported SoftWare dnce REL Ge ER PEE reb qucd ddr aee e oe ered ete 18 Accessories 17 etn ea b HRS E DOE Unt tale GO EASIER 19 Getting Started Procedure reo nre a E een 20 Part 1 Getting Started via a ac ie 21 Chapter 2 Setting Up and Installing the Module Lus 23 Unp ackinp c uu E Sat ERO EUER UC eR HEU 25 Attaching Modules to the Computer 0 6 eee nee 26 Connecting Directly to the USB Ports 00 26 Connecting to an Expansion Hub 0 6 27 Configuring the DT9818 Device Driver 0 0 0 29 Chapter 3 Wiring Signals 0 00 cece eee 31 Preparing to Wire Signals 0 000s 33 Wirin
117. page 89 for more information about these modes Logic high level external gate input Enables a counter timer operation when the Counter n Gate signal is high and disables a counter timer operation when the Counter n Gate signal is low Note that this gate type is used for event counting and rate generation modes refer to page 89 for more information about these modes e Falling edge external gate input Enables a counter timer operation when a high to low transition is detected on the Counter n Gate signal In software this is called a low edge gate type Note that this gate type is used for edge to edge measurement one shot and repetitive one shot mode refer to page 89 for more information about these modes 88 Principles of Operation Rising edge external gate input Enables a counter timer operation when a low to high transition is detected on the Counter n Gate signal In software this is called a high edge gate type Note that this gate type is used for edge to edge measurement one shot and repetitive one shot mode refer to page 89 for more information about these modes Specify the gate type in software Pulse Output Types and Duty Cycles The DT9818 modules can output the following types of pulses from each counter timer High to low transitions The low portion of the total pulse output period is the active portion of the counter timer clock output signal Low to high transitions The high portion o
118. pared to provide the following information Your product serial number The hardware software product you need help on The version of the OMNI CD you are using Your contract number if applicable If you are located outside the USA contact your local distributor see our web site www datatranslation com for the name and telephone number of your nearest distributor 108 Troubleshooting If Your Module Needs Factory Service If your module must be returned to Data Translation do the following 1 Record the module s serial number and then contact the Customer Service Department at 508 481 3700 ext 1323 if you are in the USA and obtain a Return Material Authorization RMA If you are located outside the USA call your local distributor for authorization and shipping instructions see our web site www datatranslation com for the name and telephone number of your nearest distributor All return shipments to Data Translation must be marked with the correct RMA number to ensure proper processing 2 Using the original packing materials if available package the module as follows Wrap the module in an electrically conductive plastic material Handle with ground protection A static discharge can destroy components on the module Place ina secure shipping container 3 Return the module to the following address making sure the RMA number is visible on the outside of the box Customer Service Dept D
119. pendix C Screw Terminal Block TB3 Table 48 lists the screw terminal assignments for screw terminal block TB3 on the DT9818 32 STP Table 48 Screw Terminal Assignments for Terminal Block TB3 Screw Terminal Signal Description 18 5 V Analog 17 Digital Ground 16 Analog Ground 15 Analog Ground 14 Amplifier Low 13 Amplifier Low 12 Analog Ground 11 Analog In 15 DI Return Analog In 31 SE 10 Analog In 15 DI Analog In 23 SE 9 Analog Ground 8 Analog In 14 DI Return Analog In 30 SE 7 Analog In 14 DI Analog In 22 SE 6 Analog Ground 5 Analog In 13 DI Return Analog In 29 SE 4 Analog In 13 DI Analog In 21 SE 3 Analog Ground 2 Analog In 12 DI Return Analog In 28 SE 1 Analog In 12 DI Analog In 20 SE 158 BNC and STP Box Connections Screw Terminal Block TB4 Table 49 lists the screw terminal assignments for screw terminal block TB4 on the DT9818 32 STP Table 49 Screw Terminal Assignments for Terminal Block TB4 Screw Terminal Signal Description 18 Digital Ground 17 Digital Ground 16 External ADC Trigger 15 Digital Ground 14 External ADC Clock 13 Digital Ground 12 External DAC Trigger 11 Digital Ground 10 External DAC Clock 9 Digital Ground 8 Reserved 7 Reserved 6 Reserved 5 Reserved 4 DAC1 Return 3 DAC1 Out 2 DACO Return 1 DACO Out 159 Appendix C
120. plet you can select whether to use 10 kQ termination resistance between the low side of each differential channel and isolated analog ground This feature is particularly useful with floating signal sources Refer to page 37 for more information about wiring analog input signals Refer to page 29 for information on configuring the driver to use bias return termination resistance The DT9818 module can acquire data from a single analog input channel or from a group of analog input channels The following subsections describe how to specify the channels Specifying a Single Channel The simplest way to acquire data from a single channel is to specify the channel for a single value analog input operation using software refer to page 72 for more information on single value operations You can also specify a single channel using an input channel gain list described in the next section Note If you want to perform a single value digital input operation while the A D subsystem is configured specify channel 32 for the DT9818 32 OEM module only or channel 16 for all other DT9818 modules to select the digital input port for the A D single value operation Principles of Operation Specifying One or More Channels You can read data from one or more analog input channels using an input channel gain list You can group the channels in the list sequentially starting either with 0 or with any other analog input channel or randomly You can a
121. put 17 SEP 11 Analog Input 10 DI 30 Analog Input 10 DI Return Analog In 26 SEP Analog Input 18 SEP 12 Analog Input 11 DI 31 Analog Input 11 DI Return Analog In 27 SE Analog Input 19 SEP 13 Analog Input 12 DI 32 Analog Input 12 DI Return Analog In 28 SEP Analog Input 20 SEP 14 Analog Input 13 DI 33 Analog Input 13 DI Return Analog In 29 SEP Analog Input 21 SEP 15 Analog Input 14 DI 34 Analog Input 14 DI Return Analog In 30 SE Analog Input 22 SEP 16 Analog Input 15 DI 35 Analog Input 15 DI Return Analog In 31 SE Analog Input 23 SEP 17 Amplifier Low 36 Analog Ground 18 5 V Analog 37 Digital Ground 19 Chassis Ground a The first signal description Return applies to the differential configuration for all modules The second signal description applies to the single ended configuration for the DT9818 OEM and DT9818 32 OEM modules These pins are used for the DT9818 32 OEM module only The first signal description applies to the differential configuration the second signal description applies to the single ended configuration Connector Pin Assignments EP355 Screw Terminal Assignments The EP355 screw terminal panel is used with the DT9818 OEM and DT9818 32 OEM modules The screw terminal assignments depend on whether the EP355 is attached to connector J2 or connector J3 on the module Figure 37 shows the locations of the 14 position screw terminal blocks on the EP355 screw terminal panel
122. r n Gate signal You can use this mode to clean up a poor clock input signal by changing its pulse width and then outputting it The module continues to output pulses until you stop the operation Note that any Counter n Gate signals that occur while the pulse is being output are not detected by the module The period of the output pulse is determined by the C T clock source either internal using a clock divider or external Note that in repetitive one shot mode the internal C T clock is more useful than the external clock refer to page 88 for more information about the C T clock Sources Using software specify the counter timer mode as repetitive one shot the polarity of the output pulses high to low transition or low to high transition the C T clock source as external recommended and the active gate type rising edge or falling edge Refer to page 89 for more information about pulse output types and to page 88 for more information about gates Note Ina repetitive one shot operation the maximum frequency of the external clock going into the DT9818 is 1 MHz and the maximum frequency of the signal that is output by the DT9818 is 1 MHz In the case of a one shot operation it is recommended that you set the duty cycle to 100 Due to the isolation circuitry of the hardware the width of the output pulse increases as the clock frequency increases above 10 KHz Therefore you may not achieve the pulse width you expect Make
123. r the DACs or the digital output port the last value placed in the output channel gain list continues to be output by the DACs port You can ignore this error when performing a single value operation DAC Over Sample error The output sample clock rate is too fast This error is reported if anew output sample clock occurs while the module is busy loading the next values from the output channel gain list into the DACs and or digital output port To avoid this error try slowing down the D A clock using a different wrap mode increasing the buffer size to greater than 1K and or using more buffers Note If you experience problems with a continuous analog output operation try increasing the number of buffers and or the size of the buffers you are using to a value greater than 1K 84 Principles of Operation Digital I O Features This section describes the following features of digital I O operations Digital I O lines described below Operation modes described on page 85 Digital I O Lines DT9818 modules support one digital input port consisting of 8 digital input lines lines 0 to 7 and one digital output port consisting of 8 digital output lines lines 0 to 7 The resolution is fixed at 8 bits You can specify the digital I O line that you want to read or write in a single value digital I O operation Refer to page 85 for more information about single value operations In addition you can specify the entire dig
124. rence This equipment has been tested and found to comply with CISPR EN55022 Class A and EN61000 6 1 requirements and also with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Changes or modifications to this equipment not expressly approved by Data Translation could void your authority to operate the equipment under Part 15 of the FCC Rules Note This product was verified to meet FCC requirements under test conditions that included use of shielded cables and connectors between system components It is important that you use shielded cables and connectors to reduce the possibility of causing interference to radio television and other electronic devices Canadian Department of Communications Statement This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communicati
125. rent Low input current Internal Software initiated External Software selectable Input type Edge sensitive Logic family LVTTL 5 V tolerance Inputs 1 LVTTL 22 kQ pull up to 3 3 V 2 2 V 0 6 V 25 UA maximum 0 25 mA maximum Minimum pulse width High 500 ns Low 500 ns Triggering modes Single scan Yes Continuous scan Yes Triggered scan Yes 123 Appendix A Internal Clock Specifications Table 29 lists the specifications for the internal A D and D A clocks on the DT9818 module Table 29 Internal A D and D A Clock Specifications Feature Specifications Reference frequency 48 MHz Frequency range 0 011176 Hz to 150 kHz Period range 6 67 ns to 89 477 s 124 Specifications External Clock Specifications Table 30 lists the specifications for the external A D and D A clocks on the DT9818 module Table 30 External A D and D A Clock Specifications Input logic load Input termination High input voltage Feature Specifications Input type A D Falling edge D A Rising edge Logic family LVTTL 5 V tolerance Inputs 1 LVTTL 22 kQ pull up to 3 3 V 22V Low input voltage 0 6 V Oscillator frequency DC to 1 MHz Minimum pulse width High 500 ns Low 500 ns 125 Appendix A Power Physical and Environment Specifications Table 31 lists the power physical and environmental specifications for the DT9818
126. s Separate power and signal lines by using physically different wiring paths or conduits To avoid noise do not locate the module and cabling next to sources that produce high electromagnetic fields such as large electric motors power lines solenoids and electric arcs unless the signals are enclosed in a mumetal shield Prevent electrostatic discharge to the I O while the box is operational Connect all unused analog input channels to analog ground Wiring to the DT9818 OEM or DT9818 32 OEM Module Figure 4 shows the I O connectors on the DT9818 OEM and DT9818 32 OEM modules USB Connector DT9818 OEM and J1 DT9818 32 OEM i Pin 34 Pin 1 Pin 34 Pin 1 Pin 68 Pin 35 Pin 68 Pin 35 7 Connector J2 Connector J3 Figure 4 Connectors on the DT9818 OEM and DT9818 32 OEM Modules 33 Chapter 3 To connect signals to the DT9818 OEM or DT9818 32 OEM module you can use the following wiring methods Build your own connector panel and cable to connectors J2 and J3 See page 127 for connector specifications and page 131 for connector pin assignments e EP353 This accessory panel plugs into connector J2 of the module It provides one 37 pin D sub connector and one 26 pin connector for attaching analog input signals Refer to page 34 for more information about attaching the EP353 to the module refer to page 136 for connector pin assignments e EP355 When plugged into connector J2 of the modu
127. s the first output value for DACO the first output value for the digital output port the second output value for DACO the second output value for the digital output port and so on When it detects a trigger the module starts writing the values from the output buffer to the channels specified in the output channel gain list The operation repeats continuously until either all the data is output from the buffers or you stop the operation Refer to page 84 for more information about buffers Figure 28 shows the timing diagram for a continuous output operation The channels in the output channel gain list are updated simultaneously with the values from specific locations in the output buffer For example the values from buffer locations 0 3 6 and 9 are written to DACO the values from buffer locations 1 4 7 and 10 are written to DAC1 and the values from buffer locations 2 5 8 and 11 are written to the digital output port Trigger semi El H Clock DAC 0 K 0 gt 3 XT 6 9 12 15 18 DAC 1 1 4 7 x 30 x 18 16 19 Digital K 2 5 8 11 14 17 20 Output Hee ee es EE ee ee ep eee tee et ee ee E Port Output Buffer Locations Figure 28 Timing Diagram for a Continuous Output Operation Make sure that the host computer transfers data to the output channel gain list fast enough so that the list does not empty completely otherwise an underrun error resul
128. s 16 FifoSize 97 165 Index 166 formatting data analog input 76 analog output 84 frequency base clock 102 external A D clock 72 external C T clock 88 external DAC clock 80 internal A D clock 72 102 internal A D sample clock 102 internal C T clock 88 102 internal DAC clock 80 internal retrigger clock 98 output pulse 92 frequency measurement 46 59 91 G gain actual available 99 analog input 71 analog output 79 number of 99 programmable 99 gate type 88 high edge 103 high level 103 internal 103 low edge 103 low level 103 gate falling edge type 103 gate rising edge type 104 generating pulses 92 93 94 H hardware features 16 help online 53 high edge gate type 103 high level gate type 103 hot swapping 26 I inprocess buffers 98 input ranges 71 sample clock sources 72 input channel gain list 67 reading the counter timers 69 reading the digital input port 68 specifying analog input channels 67 input configuration differential analog 37 66 pseudo differential analog 37 66 single ended analog 37 65 Input FIFO Overflow error 77 internal clock 88 102 gate type 103 interrupt driven operations 104 interrupts 97 J J1 connector DT9818 OEM and DT9818 32 OEM 131 EP353 136 EP356 144 J2 connector DT9818 OEM and DT9818 32 OEM 132 EP353 137 EP356 145 J3 connector DT9818 OEM and DT9818 32 OEM 134 L LabVIEW 18 LEDs 27 lines digital I O 85 low edge gate type 103 low level g
129. set as follows a Verify that 0 V is applied to AD Ch0 and that A D Channel Select is set to Channel 0 The current voltage reading for this channel is displayed in the A D Value window b Adjust the offset by entering values between 0 and 255 in the Offset edit box or by clicking the up down buttons until the A D Value is 0 V 114 Calibration 2 Adjust the gain as follows a Verify that 9 375 V is applied to AD Ch0 and that A D Channel Select is set to Channel 0 The current voltage reading for this channel is displayed in the A D Value window b Adjust the gain by entering values between 0 and 255 in the Gain edit box or by clicking the up down buttons until the A D Value is 9 3750 V Note Atany time you can click Restore Factory Settings to reset the A D calibration values to their original factory settings This process will undo any auto or manual calibration settings Once you have finished this procedure continue with Calibrating the Analog Output Subsystem on page 116 115 Chapter 8 116 Calibrating the Analog Output Subsystem To calibrate the analog output circuitry of the DT9818 module connect an external precision voltmeter to analog output channels 0 and 1 of the DT9818 module and then perform the following steps 1 2 10 11 Select the D A Configuration tab of the DT9818 Calibration Utility Connect an external precision voltmeter to Analog Output 0 DAC Ch0 of the DT9818
130. ssions EMI FCC Part 15 EN55022 1994 A1 1995 A2 1997 VCCI AS NZS 3548 Class A Immunity EN61000 6 1 2001 RoHS EU Directive 2002 95 EG Compliant as of July 1st 2006 Connector Pin Assignments DT9818 OEM and DT9818 32 OEM Pin Assignments e a eee eee eens 131 EP353 Accessory Panel Pin Assistens cd eene ee i 136 EP355 Screw Terminal Assignmenis 0 44 0c et rete e Re Oe ERE RE EY 139 EP296 Accessory Panel Pin Assignments usce doe RO GE EC RR RR 144 129 Appendix B Note This appendix provides connector information for the DT9818 OEM and DT9818 32 OEM modules and related accessories For information about the BNC and STP connection box versions of the DT9818 refer to Appendix C starting on page 147 130 Connector Pin Assignments DT9818 OEM and DT9818 32 OEM Pin Assignments The DT9818 OEM and DT9818 32 OEM modules provide three connectors J1 J2 and J3 The following sections provide information about each of these connectors Connector J1 on the Module Figure 32 shows the orientation of the pins for the USB connector J1 on the DT9818 OEM and DT9818 32 OEM modules Figure 32 Orientation of the Pins for the USB Connector J1 on the DT9818 OEM and DT9818 32 OEM Modules Table 34 lists the pin assignments for the USB connector J1 on the DT9818 OEM and DT9818 32 OEM modules Table 34 Pin Assignments for the USB C
131. th two 37 pin connectors that connect an EP353 accessory panel to an STP37 screw terminal panel 19 Chapter 1 Getting Started Procedure The flow diagram shown in Figure 1 illustrates the steps needed to get started using the DT9818 module This diagram is repeated in each getting started chapter the shaded area in the diagram shows you where you are in the getting started procedure a Set Up and Install the Module Ne see Chapter 2 starting on page 23 Wire Signals see Chapter 3 starting on page 31 Verify the Operation of the Module see Chapter 4 starting on page 51 Figure 1 Getting Started Flow Diagram 20 Part 1 Getting Started Setting Up and Installing the Module uon JE 25 Attaching Modules to the Computer ccc sisse esee ehe ek eee hse t 26 Configuring the DT9318 Device Driver iiic bm eme ex aE 29 23 Chapter 2 Set Up and Install the Module this chapter Wire Signals see Chapter 3 starting on page 31 Verify the Operation of the Module see Chapter 4 starting on page 51 Note The DT9818 module is factory calibrated If you decide that you want to recalibrate the analog input or analog output circuitry refer to the instructions in Chapter 8 starting on page 111 24 Setting Up and Installing the Module Unpacking Open the shipping box and verify that the following items are present DT9818 module Data Acquisitio
132. the STP37 screw terminal panel when used with the and EP360 cable and Analog Input connector on the BNC box Table 43 Analog Input Connector STP37 Pin Assignments Pin Signal Description Pin Signal Description 19 Chassis Ground when 37 Digital Ground used with EP360 cable otherwise no connect 18 5 V Analog 36 Analog Ground 17 Amplifier Low 35 Reserved 16 Reserved 34 Reserved 15 Reserved 33 Reserved 14 Reserved 32 Reserved 13 Reserved 31 Reserved 12 Reserved 30 Reserved 11 Reserved 29 Reserved 10 Reserved 28 Reserved 9 Reserved 27 Analog Input 7 Return Analog In 15 8 Analog Input 7 26 Analog Input 6 Return Analog In 142 7 Analog Input 6 25 Analog Input 5 Return Analog In 13 6 Analog Input 5 24 Analog Input 4 Return Analog In 122 5 Analog Input 4 23 Analog Input 3 Return Analog In 112 4 Analog Input 3 22 Analog Input 2 Return Analog In 10 3 Analog Input 2 21 Analog Input 1 Return Analog In 9 2 Analog Input 1 20 Analog Input O Return Analog In 8 1 Analog Input 0 a The first signal description Return applies to the differential configuration The second signal description applies to the single ended configuration 152 BNC and STP Box Connections Digital In Out Connector The Digital In Out connector allows you to access the digital I O signals Table 44 lists the pin assignments for both the Digital In Out connector on the BNC conn
133. the input channel gain list depends on the total number of channels in list For example since the maximum throughput of the analog input subsystem is 150 kSamples s the module can read two input channels at a rate of 75 kSamples s each or five input channels at a rate of 30 kSamples s each 67 Chapter 5 Specifying Digital Input Lines in the Input Channel Gain List In addition to the analog input channels the DT9818 allows you to read eight digital input lines Port A lines 0 to 7 using the input channel gain list This feature is particularly useful when you want to correlate the timing of analog and digital events If you are using the DT9818 32 OEM module specify channel 32 in the channel gain list to read the eight digital input lines for all other modules specify channel 16 in the input channel gain list to read the eight digital input lines You can enter this channel anywhere in the list and can enter it more than once if desired Table 4 shows an example of entering the digital input port in the input channel gain list Table 4 An Example of Specifying the Digital Input Port in the Input Channel Gain List Channel Gain List Entry Channel Gain Operation Description 0 0 1 AINO Read analog input channel 0 using a gain of 1 input range of 10 V 1 3 2 AIN3 Read analog input channel 3 using a gain of 2 input range of 5 V 2 0 1 AINO Read analog input channel 0
134. trigger A software trigger event occurs when you start the analog output operation Using software specify the trigger source as a software trigger External digital TTL trigger An external digital TTL trigger event occurs when the DT9818 module detects a transition rising edge or falling edge on the External DAC Trigger input signal connected to the module Using software specify the trigger source as either an external positive digital TTL trigger for a rising edge digital trigger or an external negative digital TTL trigger for a falling edge trigger Output Clocks DT9818 module allows you to use one of the following clock sources to pace analog output operations Internal DAC clock Using software specify the clock source as internal and the clock frequency at which to pace the operation The minimum frequency supported is 0 75 Samples s the maximum frequency supported is 150 kSamples s External DAC clock An external DAC clock is useful when you want to pace conversions at rates not available with the output sample clock or when you want to pace at uneven intervals Connect an external DAC clock to the External DAC Clock input signal on the DT9818 module Analog output operations start on the rising edge of the external DAC clock output signal Using software specify the clock source as external The clock frequency is always equal to the frequency of the external DAC clock output signal that you connect
135. trigger the module cycles through the input channel gain list acquiring and converting the value for each entry in the list this process is defined as the scan The module then wraps to the start of the input channel gain list and repeats the process continuously until either the allocated buffers are filled or until you stop the operation Refer to page 76 for more information about buffers The conversion rate is determined by the frequency of the input sample clock refer to page 72 for more information about the input sample clock The sample rate which is the rate at which a single entry in the input channel gain list is sampled is determined by the frequency of the input sample clock divided by the number of entries in the input channel gain list To select continuous scan mode use software to specify the data flow as Continuous and to specify the initial trigger the trigger source that starts the operation You can select a software trigger an external positive digital TTL trigger or an external negative digital TTL trigger as the initial trigger Refer to page 76 for more information about the supported trigger sources Figure 26 illustrates continuous scan mode using an input channel gain list with three entries channel 0 channel 1 and channel 2 In this example analog input data is acquired on each clock pulse of the input sample clock When it reaches the end of the input channel gain list the module wraps to the beginni
136. ts 81 Chapter 5 82 To select continuously paced analog output mode use software to specify the following parameters Specify the data flow as Continuous Specify WrapSingleBuffer as False to use multiple buffers Specify the clock source and the clock frequency refer to page 80 for more information Specify the trigger source refer to page 80 for more information We recommend that you allocate multiple buffers of at least 1K samples for a continuously paced analog output operation Data is written from multiple output buffers continuously when no more buffers of data are available the operation stops The data is gap free Note If you experience problems with a continuous analog output operation try increasing the number of buffers and or the size of the buffers you are using to a value greater than 1K To stop a continuously paced analog output operation you can stop queuing buffers for the analog output system letting the module stop when it runs out of data or you can perform either an orderly stop or an abrupt stop using software In an orderly stop the module finishes outputting the specified number of samples and then stops all subsequent triggers are ignored In an abrupt stop the module stops outputting samples immediately all subsequent triggers are ignored Waveform Generation Use waveform generation mode if you want to output a waveform which is specified in a single buffer repetitively
137. ts for Terminal Block TB1 Screw Terminal Signal Description 18 Analog Ground 17 Analog In 5 DI Return Analog In 13 SE 16 Analog In 5 15 Analog Ground 14 Analog In 4 DI Return Analog In 12 SE 13 Analog In 4 12 Analog Ground 11 Analog In 3 DI Return Analog In 11 SE 10 Analog In 3 9 Analog Ground 8 Analog In 2 DI Return Analog In 10 SE 7 Analog In 2 6 Analog Ground 5 Analog In 1 DI Return Analog In 9 SE 4 Analog In 1 3 Analog Ground 2 Analog In 0 DI Return Analog In 8 SE 1 Analog In 0 156 BNC and STP Box Connections Screw Terminal Block TB2 Table 47 lists the screw terminal assignments for screw terminal block TB2 on the DT9818 32 STP Table 47 Screw Terminal Assignments for Terminal Block TB2 Screw Terminal Signal Description 18 Analog Ground 17 Analog In 11 DI Return Analog In 27 SE 16 Analog In 11 DI Analog In 19 SE 15 Analog Ground 14 Analog In 10 DI Return Analog In 26 SE 13 Analog In 10 DI Analog In 18 SE 12 Analog Ground 11 Analog In 9 DI Return Analog In 25 SE 10 Analog In 9 DI Analog In 17 SE 9 Analog Ground 8 Analog In 8 DI Return Analog In 24 SE 7 Analog In 8 DI Analog In 16 SE 6 Analog Ground 5 Analog In 7 DI Return Analog In 15 SE 4 Analog In 7 3 Analog Ground 2 Analog In 6 DI Return Analog In 14 SE 1 Analog In 6 157 Ap
138. type Level sensitive 1 LVTTL 2 0 V minimum 0 8 V maximum 0 4 mA maximum Outputs Fan out High output Low output High output current Low output current 6 mA 3 84 V minimum 0 33 V maximum 6 mA maximum 6 mA maximum Interrupt on change No Clocked with sample clock Yes Software I O selectable No 121 Appendix A 122 Counter Timer Specifications Table 27 lists the specifications for the C T subsystems on the DT9818 modules Table 27 C T Subsystem Specifications Feature Specifications Number of counter timers 2 Resolution 32 bits per channel Minimum pulse width minimum amount of time it takes a C T to recognize an input pulse 55 5 ns Logic family LVTTL 5 V tolerance Inputs Input logic load High input voltage Low input voltage Low input current 1 LVTTL 2 0 V minimum 0 8 V maximum 0 4 mA maximum Outputs Fan out High output Low output High output current Low output current 8 mA 2 0 V minimum 0 8 V maximum 8 mA maximum 8 mA maximum Specifications External Trigger Specifications Table 28 lists the specifications for the external A D and D A triggers on the DT9818 module Table 28 External A D and D A Trigger Specifications Feature Specifications Trigger sources Input logic load Input termination High input voltage Low input voltage High input cur
139. uent applications Repeat steps 4 to 8 for the other modules that you want to configure 10 When you are finished configuring the modules click Close Continue with the instructions on wiring in Chapter 3 starting on page 31 29 Chapter 2 30 Wiring Signals Treparing to Wire DIOE iu hae ee eee ce ON Cedex dieses 33 Connecting Analog Input Signals cece esee eee eme ee Rr re eeu ea 37 Connecting Analog Output mala pen eee pe e EHE ERE EE ES 42 Connecting Digital O Signals ao eer eee Al deaths eee a da 43 Connecting Counters Timer Signals 0 62600 500 ce eoe Ree t enema ee ea 44 31 Chapter 3 32 C Set Up and Install the Module see Chapter 2 starting on page 23 Nw Wire Signals this chapter 7 o Verify the Operation of the Module see Chapter 4 starting on page 51 Wiring Signals Preparing to Wire Signals This section provides recommendations and information about wiring signals to the DT9818 OEM and DT9818 32 OEM modules For information about connecting signals to the BNC box or the screw terminal STP box refer to Appendix C starting on page 147 Wiring Recommendations Keep the following recommendations in mind when wiring signals to the DT9818 OEM or DT9818 32 OEM module Follow standard ESD procedures when wiring signals to the module Use individually shielded twisted pair wire size 14 to 26 AWG in highly noisy electrical environment
140. ut 11 DI Return Analog Input 19 SEP Analog In 27 SEP 13 Analog Ground 47 Analog Ground 132 Connector Pin Assignments Table 35 Pin Assignments for Connector J2 on the DT9818 OEM and DT9818 32 OEM Modules cont Pin Signal Description Pin Signal Description 14 Analog Input 10 DI 48 Analog Input 10 DI Return Analog Input 18 SEP Analog In 26 SE 15 Analog Ground 49 Analog Ground 16 Analog Input 9 DI 50 Analog Input 9 DI Return Analog Input 17 SEP Analog In 25 SEP 17 Analog Ground 51 Analog Ground 18 Analog Input 8 DI 52 Analog Input 8 DI Return Analog Input 16 SEP Analog In 24 SEP 19 Analog Ground 53 Analog Ground 20 Analog In 7 54 Analog In 7 DI Return Analog In 15 SE 21 Analog Ground 55 Analog Ground 22 Analog In 6 56 Analog In 6 DI Return Analog In 14 SE 23 Analog Ground 57 Analog Ground 24 Analog In 5 58 Analog In 5 DI Return Analog In 13 SE 25 Analog Ground 59 Analog Ground 26 Analog In 4 60 Analog In 4 DI Return Analog In 12 SE 27 Analog Ground 61 Analog Ground 28 Analog In 3 62 Analog In 3 DI Return Analog In 11 SE 29 Analog Ground 63 Analog Ground 30 Analog In 2 64 Analog In 2 DI Return Analog In 10 SE 31 Analog Ground 65 Analog Ground 32 Analog In 1 66 Analog In 1 DI Return Analog In 9 SE 33 Analog Ground 67 Analog Ground 34 Analog In 0 68 Analog In 0 DI Return Analog In
141. vice versa Check your wiring and ensure that what you specify in software matches your hardware configuration The DT9818 module is out of calibration DT9818 modules are calibrated at the factory If you want to readjust the calibration of the analog input or analog output circuitry refer to Chapter 3 starting on page 31 Computer does not boot The power supply of the computer is too small to handle all the system resources Check the power requirements of your system resources and if needed get a larger power supply consult the module s specifications on page 126 USB 2 0 is not recognized Your operating system does not have the appropriate Service Pack installed Standby mode is enabled on your PC Ensure that you load the appropriate Windows Service Pack version 2 for Windows XP If you are unsure of whether you are using USB 2 0 or USB 1 1 run the Open Layers Control Panel applet described on page 29 For some PCs you may need to disable standby mode on your system for proper USB 2 0 operation Consult Microsoft for more information 107 Chapter 7 Technical Support If you have difficulty using a DT9818 module Data Translation s Technical Support Department is available to provide technical assistance To request technical support go to our web site at http www datatranslation com and click on the Support link When requesting technical support be pre
142. wToHighPulse Yes Variable Pulse Width Support SupportsVariablePulseWidth Yes None internal Gate Type Support SupportsGateNone Yes High Level Gate Type Support SupportsGateHighLevel Yes Low Level Gate Type Support SupportsGateLowLevel Yes High Edge Gate Type Support SupportsGateHighEdge Yes Low Edge Gate Type Support SupportsGateLowEdge Yes Level Change Gate Type Support SupportsGateLevel Clock Falling Edge Type SupportsClockFalling Yes Clock Rising Edge Type SupportsClockRising Yes Gate Falling Edge Type SupportsGateFalling Yes 103 Chapter 6 104 Table 22 DT9818 Counter Timer Options cont DT9818 A D D A DIN DOUT C T QUAD Gate Rising Edge Type SupportsGateRising Yes Interrupt Driven Operations Yes SupportsInterrupt a In one shot and repetitve one shot mode the pulse width is set to 100 automatically b High edge and low edge are supported for one shot and repetitive one shot modes High level and low level are supported for event counting up down counting frequency measurement edge to edge measurement continuous edge to edge measurement and rate generation modes General Checklist ces Technical Support sagens r n If Your Module Needs Factory Service Troubleshooting Chapter 7 General Checklist Should you experience problems using a DT9818 module do the following 1
143. xample of entering the counter timer channels in the input channel gain list 69 Chapter 5 Table 6 An Example of Specifying Counter Timer Channels in the Input Channel Gain List Channel Gain List Entry Channel Gain Operation Description 0 0 1 AINO Read analog input channel 0 using a gain of 1 input range of 10 V 1 3 2 AIN3 Read analog input channel 3 using a gain of 2 input range of 5 V 2 0 1 AINO Read analog input channel 0 again using a gain of 1 input range of 10 V 3 6 4 AIN6 Read analog input channel 6 using a gain of 4 input range of 2 5 V 4 32 1 DIN Read the digital input port of the DT9818 32 OEM module by specifying channel 32 in the list for all other modules specify channel 16 5 33 1 C TO Read the lower 16 bit word of counter timer 0 on the DT9818 32 OEM module by specifying channel 33 in the list for all other modules specify channel 17 6 34 1 C TO Read the upper 16 bit word of counter timer 0 on the DT9818 32 OEM module by specifying channel 34 in the list for all other modules specify channel 18 7 35 1 C T1 Read the lower 16 bit word of counter timer 1 on the DT9818 32 OEM module by specifying channel 35 in the list for all other modules specify channel 19 8 36 1 C T1 Read the upper 16 bit word of counter timer 1 on the DT9818 32 OEM module by specifying channel 36 in the list for all other modules specify channel 20 1023

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