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National Instruments 700 Network Card User Manual

1. GATEO Counter 0 Gate Input This pin is the gate input for counter 0 OUTI Counter 1 Output This pin is the output of counter 1 GATEI Counter 1 Gate Input This pin is the gate input for counter 1 CLKI Counter 1 Clock Input This pin is the clock input for counter 1 OUT2 Counter 2 Output This pin is the output of counter 2 GATE2 Counter 2 Gate Input This pin is the gate input for counter 2 CLK2 Counter 2 Clock Input This pin is the clock input for counter 2 5 V 5 Volts This pin provides 5 VDC The 5 V supply is fused at 1 A which is the maximum current available DGND Digital Ground This pin is connected to the digital ground signal Indicates that the signal is active low National Instruments Corporation 3 3 DAQCard 700 User Manual Signal Connections Chapter 3 The connector pins can be grouped into analog input signal pins digital I O signal pins and timing I O signal pins Signal connection guidelines for each of these groups are included in the following pages Analog Input Signal Connections Pins 1 through 18 are analog input signal pins for the ADC Pins 1 and 2 AIGND are an analog common signal You can use these pins for a general analog power ground tie to the DAQCard 700 Pins 3 through 18 are the ACH lt 15 0 gt signal pins These pins are tied to the analog input channels of the DAQCard 700 through 4 7 kQ series resistors These resistors limit
2. National Instruments provides comprehensive technical assistance around the world In the U S and Canada applications engineers are available Monday through Friday from 8 00 a m to 6 00 p m central time In other countries contact the nearest branch office You may fax questions to us at any time Corporate Headquarters 512 795 8248 Technical support fax 800 328 2203 Branch Offices Australia Austria Belgium Canada Ontario Canada Quebec Denmark Finland France Germany Hong Kong Italy Japan Korea Mexico Netherlands Norway Singapore Spain Sweden Switzerland Taiwan UK 512 794 5678 Phone Number 03 9 879 9422 0662 45 79 90 0 02 757 00 20 519 622 9310 514 694 8521 45 76 26 00 90 527 2321 1 48 14 24 24 089 741 31 30 2645 3186 02 48301892 03 5472 2970 02 596 7456 95 800 010 0793 0348 433466 32 84 84 00 2265886 91 640 0085 08 730 49 70 056 200 51 51 02 377 1200 01635 523545 National Instruments Corporation Fax Number 03 9 879 9179 0662 45 79 90 19 02 757 03 11 519 622 9311 514 694 4399 45 76 71 11 90 502 2930 1 48 14 24 14 089 714 60 35 2686 8505 02 48301915 03 5472 2977 02 596 7455 5 520 3282 0348 430673 32 84 86 00 2265887 91 640 0533 08 730 43 70 056 200 51 55 02 737 4644 01635 523154 E 1 DAQCard 700 User Manual Technical Support Form Photocopy this form and update it each time you make changes to your software or hardware and use the c
3. 11 12 13 14 or 15 respectively thus choosing channel pairs 0 8 1 9 2 10 3 11 4 12 5 13 6 14 or 7 15 While reading the following paragraphs you may find it helpful to refer to the Analog Input Signal Connections section of Chapter 3 which contains diagrams showing the signal paths for the two configurations These two modes are software selectable RSE Input 16 Channels Default Setting RSE input means that all input signals are referenced to a common ground point that is also tied to the DAQCard 700 analog input ground The RSE configuration is useful for measuring floating signal sources See the Types of Signal Sources section of Chapter 3 for more information With this input configuration the DAQCard 700 can monitor 16 different analog input channels Considerations for using the RSE configuration are discussed in Chapter 3 Signal Connections Notice that in this mode the return path of the signal is analog ground at the connector through the AIGND pin DIFF Input Eight Channels DIFF input means that each input signal has its own reference and the difference between each signal and its reference is measured The signal and its reference are each assigned an input channel With this input configuration the DAQCard 700 can monitor eight differential analog input signals Considerations for using the DIFF configuration are discussed in Chapter 3 Signal Connections Notice that the sign
4. illustration 3 15 frequency measurement 3 16 illustration 3 16 illustration 3 17 pulse and square wave generation 3 15 pulse width measurement 3 15 time lapse measurement 3 16 timing specifications 3 17 timing I O circuitry block diagram 4 8 counter block diagram 4 9 specifications A 2 theory of operation 4 8 to 4 9 U unpacking the DAQCard 700 1 4 National Instruments Corporation Index 5 DAQCard 700 User Manual
5. illustration 3 17 pulse and square wave generation 3 15 pulse width measurement 3 15 time lapse measurement 3 16 timing specifications 3 17 Index 4 single channel data acquisition 4 5 single ended connection considerations 3 7 to 3 8 connecting signal source to DAQCard 700 illustration 3 8 when to use 3 7 single ended input mode 3 6 software programming choices for DAQCard 700 configuration of DAQCard 700 2 2 to 2 3 LabVIEW and LabWindows CVI application software 1 2 NI DAQ driver software 1 3 register level programming 1 4 specifications analog input A 1 to A 2 bus interface A 2 digital I O A 2 environment A 3 physical A 2 power requirement A 2 timing I O A 2 square wave generation 3 15 T technical support E 1 theory of operation analog input circuitry block diagram 4 4 description 4 4 block diagram of DAQCard 700 4 1 data acquisition timing circuitry block diagram 4 4 data acquisition rates 4 6 multichannel scanned data acquisition 4 5 purpose 4 5 single channel data acquisition 4 5 major components of DAQCard 700 4 1 PCMCIA I O channel interface circuitry 4 2 to 4 3 time lapse measurement 3 16 timing connections 3 14 to 3 17 data acquisition counter and timing connections 3 14 National Instruments Corporation Index EXTCONV signal timing illustration 3 14 general purpose counter and timing signal connections 3 14 to 3 17 event counting applications 3 15
6. the input current to the multiplexer The following input ranges and maximum ratings apply to inputs ACH lt 0 15 gt e Input signal range 2 5V 5 V or 10 V Maximum input voltage rating 30 V powered on or off Warning Exceeding the input signal range distorts input signals Exceeding the maximum input voltage rating may damage the DAQCard 700 card and the computer National Instruments is NOT liable for any damages resulting from any such signal connections Types of Signal Sources When configuring the input mode of the DAQCard 700 and making signal connections you should first determine whether the signal source and the measurement system are floating or ground referenced The two types of signal sources are described as follows and the types of measurement systems are described in later sections Ground Referenced Signal Sources A ground referenced signal source is one that is connected in some way to the building system ground Nonisolated outputs of instruments and devices that plug into the building power system fall into this category The difference in ground potential between two instruments connected to the same building power system is typically between 1 and 100 mV but can be much higher if power distribution circuits are not properly connected The connection instructions described later in this chapter for grounded signal sources are designed to eliminate this ground potential difference from the measured signal F
7. 8 National Instruments Corporation Chapter 4 Theory of Operation Counter OUT Figure 4 6 Counter Block Diagram Each counter has a clock input pin a gate input pin and an output pin labeled CLK GATE and OUT respectively The MSM82C54 counters are numbered zero through two and their GATE CLK and OUT pins are labeled GATE N CLK N and OUT N where N is the counter number National Instruments Corporation 4 9 DAQCard 700 User Manual Appendix A Specifications This appendix lists the specifications of the DAQCard 700 These specifications are typical at 25 C unless otherwise noted The operating temperature range is 0 to 70 C Analog Input Input Characteristics Number of channels essere 16 single ended or 8 differential software selectable Type of ADC 55 nie RI Ier rte te itd Successive approximation Resolution eite trn Oa RE EEUU 12 bits worst case code range 2024 to 2023 due to software calibration Max sampling rate ss 100 kS s Input signal ranges eene 10 V 5 V 2 5 V software selectable Input coupling toe tte NE eie DC Max working voltage signal common mode essere Each input should remain within 9 5 V of AIGND in Diff mode Overvoltage protection 30 V powered on 30 V powered off Inputs protected 25 5 trees ACH lt 0 15 gt FIFO Duff r SIZE etre heres 512 sam
8. D conversion values before any information is lost thus giving the software some extra time 512 times the sample interval to catch up with the hardware If more than 512 values are stored in the A D FIFO without the A D FIFO being read from an error condition called A D FIFO overflow occurs and A D conversion information is lost DAQCard 700 User Manual 4 4 National Instruments Corporation Chapter 4 Theory of Operation The A D FIFO generates a signal that indicates when it contains A D conversion data The state of this signal can be read from the Status Register The output from the ADC is a two s complement number ranging from 2 048 to 2 047 The output from the 12 bit ADC is always sign extended to 16 bits by the card circuitry so that data values read from the FIFO are 16 bits wide Data Acquisition Timing Circuitry A data acquisition operation refers to the process of obtaining a series of successive A D conversions at a carefully timed interval This interval is called the sample interval The data acquisition timing circuitry consists of various clocks and timing signals that perform this timing The DAQCard 700 can perform two types of data acquisition single channel data acquisition and multichannel scanned data acquisition Scanned data acquisition uses a counter to automatically switch between analog input channels during data acquisition Data acquisition timing consists of signals that initiate a data acquisition opera
9. and negative inputs of the instrumentation amplifier through input multiplexers on the DAQCard 700 The instrumentation amplifier converts two input signals to a signal that is the difference between the two input signals multiplied by the gain setting of the amplifier The amplifier output voltage is referenced to the DAQCard 700 ground The DAQCard 700 ADC measures this output voltage when it performs A D conversions Single Ended Mode Although the instrumentation amplifier on the DAQCard 700 is actually bypassed in single ended mode the effect of this mode is the same as if signals connected to ACH lt 15 0 gt were routed to the positive terminal of the instrumentation amplifier and the negative terminal of the instrumentation amplifier were connected to the analog ground reference of the DAQCard 700 Thus the voltage measured by the DAQCard 700 in single ended mode is the difference between an input signal and the DAQCard 700 analog ground reference Differential Mode In differential mode signals connected to ACH lt 7 0 gt are routed to the positive input of the instrumentation amplifier and signals connected to ACH lt 15 8 gt are routed to the negative input of the instrumentation amplifier Thus the voltage measured by the DAQCard 700 in differential mode is the difference between two of the input signals DAQCard 700 User Manual 3 6 National Instruments Corporation Chapter 3 Signal Connections Recommended Input Configu
10. compatible e Input current high or low level 1 mA Digital output compatibility TTL compatible e Output current source capability 4mA at Vog 2 2 7 V e Output current sink capability 4mA at Vor 2 0 5 V Figure 3 6 shows an example of connections to the digital input and output ports Digital input applications include receiving TTL signals and sensing external device states such as the switch in Figure 3 6 Digital output applications include sending TTL signals and driving external devices such as the LED shown in Figure 3 6 DAQCard 700 User Manual 3 12 National Instruments Corporation Chapter 3 Signal Connections Digital Input Port Digital Output Port l O Connector DAQCard 700 Figure 3 6 Digital I O Signal Connections Power Connections Pin 49 of the I O connector sends 5 V from the PCMCIA I O channel power supply This pin is referenced to DGND and can be used to power external digital circuitry that draws up to 1 A Pin 49 is connected to a 1 A resettable fuse on the card The actual current available from this signal may be less than 1 A depending on the computer Notice also that any current drawn from this line adds to the power requirements from the computer Warning Do NOT exceed any of the maximum ratings of input or output signal connections on the DAQCard 700 Doing so can damage the DAQCard 700 and the computer Exceeding the maximum connections includes connecting any power signals to ground
11. connections Figure 3 1 shows the DAQCard 700 I O connector pin assignments National Instruments Corporation 3 1 DAQCard 700 User Manual Signal Connections Chapter 3 NC DINO DIN2 DIN3 DIN4 DIN5 DIN6 DIN7 DOUTO DOUT1 DOUT2 DOUT3 DOUT4 DOUT5 DOUT6 DOUT7 OUT1 EXTINT EXTCONV OUTO GATEO OUT1 GATE1 CLK1 OUT2 GATE2 CLK2 DGND Figure 3 1 DAQCard 700 I O Connector Pin Assignments DAQCard 700 User Manual 3 2 National Instruments Corporation Chapter 3 Signal Connections Signal Connection Descriptions Signal Name Direction Description AIGND Analog Input Ground These pins are connected to the analog input ground signal ACH lt 0 15 gt Analog Input Channels 0 through 15 These channels are in single ended mode DGND Digital Ground This pin is connected to the digital ground signal 20 21 NC Not Connected These pins are not connected 22 29 DIN lt 0 7 gt Input Digital Data Lines 0 through 7 DIN7 is the MSB DINO the LSB 30 37 DOUT lt 0 7 gt Output Digital Data Lines 0 through 7 DOUTY is the MSB DOUTO the LSB 38 OUTI Counter 1 Output This pin is the inversion of counter 1 output 39 EXTINT External Interrupt This pin is used for input of the external interrupt signal EXTCONV External Control This pin is used for input of the external control signal to trigger A D conversions OUTO Counter 0 Output This pin is the output of counter 0
12. 6 to 9096 noncondensing National Instruments Corporation A 3 DAQCard 700 User Manual Appendix B Differences between the PC LPM 16 and the DAQCard 700 This appendix contains a summary of differences between the PC LPM 16 and the DAQCard 700 that may be relevant to you if you are a current PC LPM 16 user For a summary of programming differences refer to the DAQCard 700 Register Level Programmer Manual The DAQCard 700 is compatible with the PC LPM 16 Software developed for the PC LPM 16 using NI DAQ or LabWindows routines as well as LabVIEW virtual instruments VIs for the PC LPM 16 typically work with the DAQCard 700 without modification The following table summarizes the significant differences FIFO read Two 8 bit words One 16 bit word FIFO buffer size 16 samples 512 samples Maximum sample rate 50 kS s 100 kS s Supply voltages at I O connector 5 V 12 V 12 V 5 V Maximum input voltage rating 45 V 30 V ADC calibration hardware calibration software calibration Timer chip MSM82C53 MSM82C54 Maximum timer source frequency 8 MHz 10 MHz Input modes single ended single ended differential Input ranges 5 V 2 5 V 0 10 V 10 V 5 V 2 5 V 0 5 V jumper selectable software selectable The MSM82C54 timer used in the DAQCard 700 is compatible with the MSM82CS53 National Instruments Corporation B 1 DAQCard 700 User Manual Appendix C PC Card Questions and Answers This appendix contains a list of commo
13. 700 User Manual Glossary 2 National Instruments Corporation Index A ACH lt 0 15 gt signal 3 3 AIGND signal 3 3 analog input circuitry block diagram 4 4 theory of operation 4 4 analog input configuration analog input modes 2 3 to 2 4 default settings table 2 3 DIFF input definition table 2 4 description 2 4 exceeding maximum ratings warning 2 3 RSE input definition table 2 4 description 2 4 analog input signal connections differential DIFF connections 3 8 to 3 11 common mode signal rejection considerations 3 11 floating signal sources 3 10 to 3 11 grounded signal sources 3 9 differential input mode 3 6 exceeding maximum input rating warning 3 4 floating measurement systems 3 5 floating signal sources 3 4 to 3 5 ground referenced measurement systems 3 5 ground referenced signal sources 3 4 input configurations 3 5 to 3 6 pins for analog input 3 4 recommended input configurations 3 7 single ended connections 3 7 to 3 8 single ended input mode 3 6 types of measurement systems 3 5 types of signal sources 3 4 to 3 5 analog input specifications A 1 to A 2 National Instruments Corporation Index 1 B bus interface for DAQCard 700 A 2 C cabling 3 18 Card and Socket Services C 1 CLK OUT and GATE signals for general purpose timing 3 14 to 3 17 CLK1 signal 3 3 CLK2 signal 3 3 common mode signal rejection considerations 3 11 configuration See also installation
14. AQCard 700 depends on the size of the differential input signal Vaiff V in V in The formula for the permissible common mode input range is as follows Vem max 9 5 V Vaigt 2 Thus for a differential voltage as large as 10 V the largest common mode voltage that can be rejected is 4 5 V However if the differential signal is 2 5 V 8 25 V common mode voltage can be rejected The common mode voltage is measured with respect to the DAQCard 700 ground and can be calculated by the following formula V cm actual Vin Vin y2 where V jn is the signal at the positive input of the instrumentation amplifier and V is the signal at the negative input of the instrumentation amplifier If the input signal common mode range exceeds the maximum computed above with respect to the DAQCard 700 ground you need to limit the amount of floating that occurs between the signal ground and the DAQCard 700 ground National Instruments Corporation 3 11 DAQCard 700 User Manual Signal Connections Chapter 3 Digital I O Signal Connections Pins 22 through 37 of the I O connector are digital I O signal pins Pins 22 through 29 are digital input pins Pins 30 through 37 are digital output pins Pins 19 and 50 are digital ground pins The following specifications and ratings apply to the digital I O lines e Absolute maximum voltage input rating 5 5 V with respect to DGND 0 5 V with respect to DGND Digital input compatibility TTL
15. Assignments eere 3 2 Figure 3 2 DAQCard 700 Instrumentation Amplifier eee 3 6 Figure 3 3 Single Ended Analog Input Signal Connections eee 3 8 Figure 3 4 Differential Input Connections for Grounded Signal Sources 3 0 Figure 3 5 Differential Input Connections for Floating Sources 3 10 Figure 3 6 Digital I O Signal Connections 3 13 Figure 3 7 BXTCONV Signal Timing eese aeo tane de tas nt nee ban eo te Ee Eo ka ven 3 14 Figure 3 8 Event Counting Applications with External Switch Gating 3 15 Figure 3 9 Frequency Measurement Application 3 16 Figure 3 10 General Purpose Timing Signals 3 17 Figure 4 1 DAQCard 700 Block Diagram issus 4 1 Figure 4 2 PCMCIA I O Interface Circuitry Block Diagram eee 4 2 Figure 4 3 Analog Input and Data Acquisition Circuitry Block Diagram 4 4 Figure 4 4 Digital I O Circuitry Block Diagram eene 4 7 Figure 4 5 Timing I O Circuitry Block Diagram ss 4 8 Figure 4 6 Counter Block Diagramme esto SI e ip pet oett ataques id ead 4 9 Tables Table 2 1 Analog I O Default Settings iue etii estet i e oaa times 2 3 Table 2 2 Analog Input Modes for the DAQCard 700 serene 2 4 Table 3 1 Recommended Input Configurations for Ground Referenced and Floating Measurement Sy
16. Chapter 3 Signal Connections the instrumentation amplifier contributes a DC offset voltage at the input The amplifier has a maximum input offset current of 0 75 nA and a typical offset current drift of 1 5 pA C Multiplied by the 100 kQ resistor this current contributes a maximum offset voltage of 75 UV and a typical offset voltage drift of 150 nV C at the input Thus the offset is unlikely to be more than an LSB so it can usually be ignored If the input signal is DC coupled only the resistor connecting the negative signal input to ground is needed This connection does not lower the input impedance of the analog input channel Common Mode Signal Rejection Considerations Figures 3 4 and 3 5 show connections for signal sources that are already referenced to some ground point with respect to the DAQCard 700 In these cases the instrumentation amplifier can reject any voltage due to ground potential differences between the signal source and the DAQCard 700 In addition with differential input connections the instrumentation amplifier can reject common mode noise pickup in the leads connecting the signal sources to the DAQCard 700 The common mode input range of the DAQCard 700 instrumentation amplifier is defined as the magnitude of the greatest common mode signal that can be rejected The DAQCard 700 can reject common mode input signals so long as V jn and V jn are both in the range 9 5 V The common mode input range for the D
17. Connections and to install and configure your software Configuration The DAQCard 700 is completely software configurable refer to your software documentation to install and configure the software If you are using NI DAQ for PC compatibles refer to the NI DAQ release notes Find the installation and system configuration section for your operating system and follow the instructions given there If you are using NI DAQ for Macintosh refer to the NI DAQ documentation Find the installation and system configuration section for your operating system and follow the instructions given there If you are using LabVIEW the software installation instructions are in your LabVIEW release notes After you have installed LabVIEW refer to the Configuring LabVIEW section of Chapter 1 of your LabVIEW user manual for software configuration instructions DAQCard 700 User Manual 2 2 National Instruments Corporation Chapter 2 Installation and Configuration If you are using LabWindows CVI the software installation instructions are in Part 1 Introduction to LabWindows CVI of the Getting Started with LabWindows CVI manual After you have installed LabWindows CVI refer to Chapter 1 Configuring LabWindows CVI of the LabWindows CVI User Manual for software configuration instructions Analog I O Configuration At startup the DAQCard 700 defaults to the following configuration e Referenced single ended input mode e 10 V analog input range T
18. DAQCard 700 User Manual Multifunction I O Board for the PCMCIA Bus January 1996 Edition Part Number 320676C 01 Copyright 1994 1996 National Instruments Corporation All Rights Reserved National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin TX 78730 5039 512 794 0100 Technical support fax 800 328 2203 512 794 5678 Branch Offices Australia 03 9 879 9422 Austria 0662 45 79 90 0 Belgium 02 757 00 20 Canada Ontario 519 622 9310 Canada Qu bec 514 694 8521 Denmark 45 76 26 00 Finland 90 527 2321 France 1 48 14 24 24 Germany 089 741 31 30 Hong Kong 2645 3186 Italy 02 48301892 Japan 03 5472 2970 Korea 02 596 7456 Mexico 95 800 010 0793 Netherlands 0348 433466 Norway 32 84 84 00 Singapore 2265886 Spain 91 640 0085 Sweden 08 730 49 70 Switzerland 056 200 51 51 Taiwan 02 377 1200 U K 01635 523545 Limited Warranty The DAQCard 700 is warranted against defects in materials and workmanship for a period of one year from the date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace equipment that proves to be defective during the warranty period This warranty includes parts and labor The media on which you receive National Instruments software are warranted not to fail to execute programming instructions due to defects in materials and workmanship for a period of 90 days from date of shipment as evidenced by rece
19. I S 3 18 Chapter 4 Theory of Operation 6 4 03 eof tote to eie it lao ial enclosed 4 1 FunctiGnial Overview RETIA T an tReet cae eRe alt tee 4 PCMCIA I O Channel Interface Circuitry cistern sara dietro da witha ala tert addu 4 2 Analog Input and Data Acquisition Circuitry ss 4 3 Analog Input CIrCUMEy Leu ence ede d retos que deu dre eiae eae Rats 4 4 Data Acquisition Timing Circuitry is 4 5 Single Channel Data Acquisition ss 4 5 Multichannel Scanned Data Acquisition 4 5 Data Acquisition Rates uiia nn eus iea Y Go qan a ode rogans 4 6 Digital DO CHU osi pedes soe ES EISE EH AED dan tnt Ode sot gba rooster uae etes 4 7 Timing I O CATCUI aient eoram e pas ndn INS U ee anses 4 8 Appendix A Specifications gr Nc eR ae A 1 Appendix B Differences between the PC LPM 16 and the DAQCard 700 B 1 Appendix C PC Card Questions and Answers 1 eene C 1 Appendix D Power Management Modes D 1 Appendix E Customer Communication E 1 GIOSSAEY sie o ase itu id needs ten edes Glossary 1 MAER exco M cC eT CA utc CL E fa CAN LOL SS Index 1 DAQCard 700 User Manual vi National Instruments Corporation Contents Figures Figure 1 1 The Relationship between the Programming Environment NI DAQ AMY QUE Hardware ann En mn entendent 1 3 Figure 2 1 A Typical Configuration for the DAQCard 700 eee 2 2 Figure 3 1 DAQCard 700 I O Connector Pin
20. IEW Data Acquisition VI Library a series of VIs for using LabVIEW with National Instruments DAQ hardware is included with LabVIEW The LabVIEW Data Acquisition VI Libraries are functionally equivalent to the NI DAQ software LabWindows CVI features interactive graphics a state of the art user interface and uses the ANSI standard C programming language The LabWindows CVI Data Acquisition Library a series of functions for using LabWindows CVI with National Instruments DAQ hardware is included with the NI DAQ software kit The LabWindows CVI Data Acquisition libraries are functionally equivalent to the NI DAQ software Using LabVIEW or LabWindows CVI software will greatly reduce the development time for your data acquisition and control application DAQCard 700 User Manual 1 2 National Instruments Corporation Chapter 1 Introduction NI DAQ Driver Software The NI DAQ driver software is included at no charge with all National Instruments DAQ hardware NI DAQ is not packaged with SCXI or accessory products except for the SCXI 1200 NI DAQ has an extensive library of functions that you can call from your application programming environment These functions include routines for analog input A D conversion buffered data acquisition high speed A D conversion analog output D A conversion waveform generation digital I O counter timer operations SCXI RTSI self calibration messaging and acquiring data to extended memory NI DAQ ha
21. Introduction Chapter 1 Register Level Programming The final option for programming any National Instruments DAQ hardware is to write register level software Writing register level programming software can be very time consuming and inefficient and is not recommended for most users Even if you are an experienced register level programmer consider using NI DAQ LabVIEW or LabWindows CVI to program your National Instruments DAQ hardware Using the NI DAQ LabVIEW or LabWindows CVI software is as easy and as flexible as register level programming and can save weeks of development time Unpacking The DAQCard 700 is shipped in an antistatic vinyl envelope when you are not using the DAQCard 700 you should store it in this envelope Because the DAQCard 700 is enclosed in a fully shielded case no additional electrostatic precautions are necessary However for your own safety and to protect the DAQCard 700 never attempt to touch the pins of the connectors DAQCard 700 User Manual 1 4 National Instruments Corporation Chapter 2 Installation and Configuration This chapter describes how to install and software configure the DAQCard 700 Installation Your computer should be equipped with Card and Socket Services 2 0 or later The DAQCard 700 requires a 32 byte I O address window and one interrupt level This manual assumes that you are using one of the optional cables from National Instruments Notice that the cable is keyed so
22. NAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA PROFITS USE OF PRODUCTS OR INCIDENTAL OR CONSEQUENTIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILITY THEREOF This limitation of the liability of National Instruments will apply regardless of the form of action whether in contract or tort including negligence Any action against National Instruments must be brought within one year after the cause of action accrues National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control The warranty provided herein does not cover damages defects malfunctions or service failures caused by owner s failure to follow the National Instruments installation operation or maintenance instructions owner s modification of the product owner s abuse misuse or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside reasonable control Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of National Instruments Corporation Trademarks LabVIEW NI DAQS RTSI DAQCard and DAQPad are trademarks of National In
23. S First you can determine which memory window Card Services is using and then exclude that window from use by Card Services and or the memory manager Second you can attempt to determine all of the memory that Card Services can possibly use and then exclude all but that memory from use by Card Services How do I determine all of the memory that Card Services can use One way to find out which memory addresses Card Services can use is to run a utility such as MSD EXE that scans the system and tells you how the system memory is being used For example if you run such a memory utility and it tells you that physical addresses C0000 to C9FFF are being used for ROM access then you know that C8000 D3FFF is an invalid range for Card Services and should be changed to CA000 D3FFF How can I find usable I O addresses Finding usable I O addresses is done by trial and error Of the three resources used memory I O interrupts I O conflicts will be low You can use either DAQCONF EXE in DOS or WDAQCONF in Windows to diagnose I O space conflicts When you have configured DAQCONF or WDAQCONF for a particular I O space save the configuration If there is a conflict the configuration utility will report an error describing the conflict How do I find usable interrupt levels Some utilities such as MSD EXE will scan the system and display information about what is using hardware interrupts If you have such a utility you can r
24. a bit signal or port for example ACH lt 0 7 gt stands for ACHO through ACH7 Abbreviations acronyms metric prefixes mnemonics symbols and terms are listed in the glossary National Instruments Documentation The DAQCard 700 User Manual is one piece of the documentation set for your data acquisition system You could have any of several types of manuals depending on the hardware and software in your system Use the manuals you have as follows Getting Started with SCXI If you are using SCXI this is the first manual you should read It gives an overview of the SCXI system and contains the most commonly needed information for the modules chassis and software e Your SCXI user manuals If you are using SCXI read these manuals next for detailed information about signal connections and module configuration They also explain in greater detail how the module works and contain application hints Your DAQ board user manuals These manuals have detailed information about the DAQ hardware that plugs into or is connected to your computer Use these manuals for hardware installation and configuration instructions specification information about your DAQ hardware and application hints DAQCard 700 User Manual x National Instruments Corporation About This Manual e Software documentation Examples of software documentation you may have are the LabVIEW and LabWindows CVI manual sets and the NI DAQ documentation a 4 6 1 or
25. able 2 1 lists the available analog I O configurations for the DAQCard 700 and shows the default settings Table 2 1 Analog I O Settings Analog Input Polarity Bipolar 10 V default setting Bipolar 5 V Bipolar 2 5 V Analog Input Mode Referenced single ended RSE default setting Differential DIFF The analog input circuitry is software configurable Warning Connections including power signals to ground and vice versa that exceed any of the maximum signal ratings on the DAQCard 700 can result in damage to the DAQCard 700 card National Instruments is NOT liable for any damages or injuries resulting from incorrect signal connections Analog Input Mode The DAQCard 700 has two different input modes referenced single ended RSE input and differential DIFF input The single ended input configuration provides 16 channels The DIFF input configuration provides eight channels Table 2 2 describes these configurations National Instruments Corporation 2 3 DAQCard 700 User Manual Installation and Configuration Chapter 2 Table 2 2 Analog Input Modes for the DAQCard 700 Analog Input Description Modes Referenced single ended mode provides 16 single ended inputs referenced to analog ground default setting Differential mode provides eight differential inputs with the positive input of the instrumentation amplifier tied to channels 0 1 2 3 4 5 6 or 7 and the negative input tied to channels 8 9 10
26. al return path is through the negative terminal of the instrumentation amplifier and through channel 8 9 10 11 12 13 14 or 15 depending on which channel pair you select DAQCard 700 User Manual 2 4 National Instruments Corporation Chapter 2 Installation and Configuration Digital I O Configuration The DAQCard 700 always uses one 8 bit digital output port and one 8 bit digital input port Counter Configuration You can use the MSM82C54 counter timers for general purpose applications such as pulse and square wave generation event counting and pulse width time lapse and frequency measurement For information about configuring the MSM82C54 see the Timing Connections section of Chapter 3 Signal Connections National Instruments Corporation 2 5 DAQCard 700 User Manual Chapter 3 Signal Connections This chapter describes the signals on the DAQCard 700 I O connector as well as typical cable setups I O Connector Figure 3 1 shows the pin assignments for the DAQCard 700 I O connector This connector is attached to the ribbon cable that extends from the PCMCIA slot when the card is installed and the cable is connected Warning Connections that exceed any of the maximum ratings of input or output signals on the DAQCard 700 can damage the DAQCard 700 card and the computer This includes connecting any power signals to ground and vice versa National Instruments is NOT liable for any damages resulting from any such signal
27. analog I O analog input modes 2 3 to 2 4 default settings table 2 3 DIFF input 2 4 exceeding maximum ratings warning 2 3 RSE input 2 4 counter timers 2 5 digital I O 2 5 input configurations 3 5 to 3 7 differential mode 3 6 instrumentation amplifier 3 6 recommended input configurations table 3 7 single ended mode 3 6 PCMCIA C 1 software configuration of DAQCard 700 2 2 to 2 3 typical configuration illustration 2 2 counter timers See also general purpose counter and timing connections configuration 2 5 MSMS2C54 counter timer 3 14 to 3 15 customer communication xi E 1 D DAQCard 700 DAQCard 700 User Manual Index block diagram 4 1 compared with PC LPM 16 B 1 features 1 1 major components 4 1 software programming choices LabVIEW and LabWindows CVI application software 1 2 NI DAQ driver software 1 3 register level programming 1 4 unpacking 1 4 what you need to get started 1 2 data acquisition counter and timing connections 3 14 data acquisition timing circuitry block diagram 4 4 data acquisition rates 4 6 multichannel scanned data acquisition 4 5 purpose 4 5 single channel data acquisition 4 5 theory of operation 4 5 to 4 6 DGND signal 3 3 DIFF input configuration 2 4 definition table 2 4 differential input mode 3 6 differential connections 3 8 to 3 11 common mode signal rejection considerations 3 11 definition 3 8 floating signal sources 3 10 to 3 11 ground
28. and vice versa National Instruments is NOT liable for any damages resulting from any such signal connections National Instruments Corporation 3 13 DAQCard 700 User Manual Signal Connections Chapter 3 Timing Connections Pins 38 through 48 of the I O connector are connections for timing I O signals The DAQCard 700 timing I O uses an MSM82C54 counter timer integrated circuit All three counters of the MSM82C54 are available at the I O connector One of these counters counter 0 is used for data acquisition timing Pin 40 carries an external signal EXTCONV that can be used for data acquisition timing in place of counter 0 of the MSM82C54 This signal is explained under Data Acquisition Timing Connections Pins 38 and 41 through 48 carry general purpose timing signals from the MSM82C54 These signals are explained under General Purpose Counter and Timing Signal Connections later in this chapter Data Acquisition Counter and Timing Connections Counter 0 on the MSM82C54 counter timer is used as a sample interval counter in timed A D conversions In addition to counter 0 you can use pin 40 EXTCONV to externally time conversions If you need to program this chip directly refer to the optional DAQCard 700 Register Level Programmer Manual for the programming sequence needed to enable this input Figure 3 7 shows the timing requirements for the EXTCONV input An A D conversion is initiated by a rising edge on the EXTCONV The data from t
29. annel scanning is controlled by a scan counter For scanning operations the scan counter decrements from the highest numbered channel selected by the user through channel 0 and then repeats the sequence For single ended mode therefore any number of channels from 2 to 16 can be scanned For differential mode any number of channels from 2 to 8 can be scanned Notice that the same analog input range is used for all channels in the scan sequence National Instruments Corporation 4 5 DAQCard 700 User Manual Theory of Operation Chapter 4 Data Acquisition Rates The maximum data acquisition rate number of samples per second is determined by the conversion period of the ADC plus the acquisition time of its track and hold stage During multichannel scanning the data acquisition rate is further limited by the settling time of the input multiplexers and operational amplifier After the input multiplexers are switched the amplifier must be able to settle to the new input signal value to within 12 bit accuracy before an A D conversion is performed or 12 bit accuracy cannot not be achieved If your chosen data acquisition rate does not allow the specified settling time the analog input circuitry may not perform at 12 bit accuracy Furthermore if the maximum data acquisition rate is exceeded A D conversions may be lost The maximum data acquisition rate and settling time specifications at various input ranges are listed in Appendix A Specifica
30. ata and control buses interconnect the components The theory of operation for each of these components is explained in the remainder of this chapter The theory of operation for the data acquisition circuitry is included with the discussion of the analog input circuitry PCMCIA I O Channel Interface Circuitry The PCMCIA I O channel interface circuitry consists of an address bus a data bus interrupt lines and several control and support signals The components making up the DAQCard 700 PCMCIA I O channel interface circuitry are shown in Figure 4 2 Address Bus Address Decoder Register Selects Timing Interf tertace Read and Write Signals Control Lines Card Information Structure Data Bus Data Buffers Internal Data Bus PCMCIA Control Registers c c O Q lt O O oO Interrupt Control Interrupt Requests Figure 4 2 PCMCIA I O Interface Circuitry Block Diagram DAQCard 700 User Manual 4 2 National Instruments Corporation Chapter 4 Theory of Operation When you first insert the card the system examines information stored in the DAQCard 700 Card Information Structure This data is used to configure the card appropriately for the system in which it is used When the system has assigned the card to a section of memory it updates the PCMCIA control registers and initializes the card The rest of the circuitry consists of address decoders data buffers I O channel interface timing control
31. circuitry and interrupt control circuitry The circuitry monitor uses CE1 controlled by the PCMCIA Card and Socket Services Software as the card enable signal and uses lines AO through A4 plus timing signals to generate the onboard register select signals and read write signals The data buffers control the direction of data transfer on the bi directional data lines based on whether the transfer is a read or write The interrupt control circuitry routes any enabled interrupts to the IREQ line which is routed to an available interrupt request line by the system motherboard The DAQCard 700 generates interrupts in three different situations e When a prescribed number of A D conversions can be read from FIFO e When an active low level signal is detected on the EXTINT line e When arising edge signal is detected on counter 2 output Each one of these interrupts is individually enabled and cleared If you want more detailed information on externally generating interrupts refer to the optional DAQCard 700 Register Level Programmer Manual Analog Input and Data Acquisition Circuitry The DAQCard 700 has 16 channels of analog input with 12 bit A D conversion Using the timing circuitry the DAQCard 700 can also automatically time multiple A D conversions Figure 4 3 shows a block diagram of the analog input and data acquisition circuitry National Instruments Corporation 4 3 DAQCard 700 User Manual Theory of Operation Chapter 4 Instrumen
32. earlier version of NI DAQ supports LabWindows for DOS After you set up your hardware system use either the application software LabVIEW or LabWindows CVI manuals or the NI DAQ documentation to help you write your application If you have a large and complicated system it is worthwhile to look through the software documentation before you configure your hardware e Accessory manuals If you are using accessory products read the terminal block and cable assembly installation guides They explain how to physically connect the relevant pieces of the system Consult these guides when you are making your connections e SCXI chassis manuals If you are using SCXI read these manuals for maintenance information on the chassis installation instructions and information about making custom modules Related Documentation The following documents contain information that you may find helpful as you read this manual Your NI DAQ software documentation Your computer operating manual which explains how to insert cards into the PCMCIA slot The following National Instruments manual contains detailed information for the register level programmer e DAQcCard 700 Register Level Programmer Manual This manual is available from National Instruments by request If you are using NI DAQ LabVIEW or LabWindows CVI you should not need the register level programmer manual Using NI DAQ LabVIEW or LabWindows CVI is quicker and easier than and as flexib
33. ecause Card Services allocated an unusable interrupt level to the PC Card For example on some computers interrupt level 11 is not routed to PC Cards If Card Services is not aware of this it may assign interrupt 11 to a PC Card even though the interrupt is not usable When a call uses the interrupt the interrupt never occurs and the computer locks up waiting for a response For information about how to locate an interrupt that is free to be used refer to question 4 in the Resources section National Instruments Corporation C 1 DAQCard 700 User Manual PC Card Questions and Answers Appendix C Is there a way I can conserve power on my PC Card when it is not in use Yes If you are using NI DAQ for PC compatibles version 4 8 0 or later a DOS utility called DAQPOWER EXE will switch all National Instruments PC Cards between normal mode and power down mode Power up and power down icons are also installed for Windows users to access either of these two power management modes Resources 1 How do I determine if I have a memory conflict If no PC Cards are working at all it is probably because a memory window is not usable Card Services uses a 4 KB memory window for its own internal use If the memory cannot be used then Card Services cannot read the Card Information Structure CIS from the card s EPROM which means it cannot identify cards There are two different methods you can use when Card Services has a problem reading the CI
34. ect all your analog digital and timing signals directly to the card The DAQCard 700 is fully software configurable and calibrated so that you can easily install the card and begin your acquisition without having to spend time configuring or calibrating the card The DAQCard 700 ships with NI DAQ National Instruments complete DAQ driver which handles every function listed on the data sheet for our DAQ hardware Using NI DAQ you can quickly and easily start your application without having to program the card on the register level The small size and weight of the DAQCard 700 coupled with its low power consumption make this card ideal for use in portable computers making remote data acquisition practical The card requires very little power when operating and has a standby mode that uses even less power thus extending the life of your computer batteries In addition the low cost of a system based on the DAQCard 700 makes it ideal for laboratory work in industrial and academic environments The multichannel analog input is useful in signal analysis and data logging The 12 bit ADC is useful in high resolution applications such as chromatography temperature measurement and DC voltage measurement The 16 TTL compatible digital I O line can be used for switching external devices such as transistors and solid state relays for reading the status of external digital logic and for generating interrupts The counter timers can be used to synchronize eve
35. ed signal sources 3 9 when to use 3 8 to 3 9 digital I O circuitry 4 7 configuration 2 5 signal connections 3 12 to 3 13 specifications A 2 DIN O 7 signal 3 3 documentation conventions used in manual x National Instruments documentation x to xi organization of manual ix related documentation xi DOUT lt 0 7 gt signal 3 3 DAQCard 700 User Manual Index 2 E environment specifications A 3 event counting applications 3 15 EXTCONV signal data acquisition counter and timing connections 3 14 definition 3 3 timing illustration 3 14 EXTINT signal 3 3 F fax technical support E 1 floating measurement systems 3 5 floating signal sources definition 3 4 to 3 5 differential connections 3 10 to 3 11 recommended input configurations table 3 7 frequency measurement applications 3 16 G GATE CLK and OUT signals for general purpose timing 3 14 to 3 17 GATEO signal 3 3 GATE signal 3 3 GATE signal 3 3 general purpose counter and timing connections 3 14 to 3 17 event counting applications 3 15 illustration 3 15 frequency measurement 3 16 illustration 3 16 illustration 3 17 pulse and square wave generation 3 15 pulse width measurement 3 15 time lapse measurement 3 16 timing specifications 3 17 ground referenced measurement systems 3 5 ground referenced signal sources definition 3 4 differential connections 3 9 recommended input configurations table 3 7 National Ins
36. ejects both the common mode noise in the signal and the ground potential difference between the signal source and the DAQCard 700 ground shown as Vem in Figure 3 4 National Instruments Corporation 3 9 DAQCard 700 User Manual Signal Connections Chapter 3 Differential Connections for Floating Signal Sources Figure 3 5 shows how to connect a floating signal source to an DAQCard 700 card configured for DIFF input Configuration instructions are included in the Input Configurations section earlier in this chapter Floating Signal Source Instrumentation Amplifier Measured Voltage Bias Current Return I O Connector DAQCard 700 Board in DIFF Configuration Figure 3 5 Differential Input Connections for Floating Sources The 100 kQ resistors shown in Figure 3 5 create a return path to ground for the bias currents of the instrumentation amplifier If a return path is not provided the instrumentation amplifier bias currents charge up stray capacitances resulting in uncontrollable drift and possible saturation in the amplifier Typically values from 10 to 100 KQ are used A resistor from each input to ground as shown in Figure 3 5 provides bias current return paths for an AC coupled input signal This solution although necessary for AC coupled signals lowers the input impedance of the analog input channel In addition the input offset current of DAQCard 700 User Manual 3 10 National Instruments Corporation
37. er Manual 3 18 National Instruments Corporation Chapter 4 Theory of Operation This chapter includes an overview of the DAQCard 700 and explains the operation of each functional unit making up the DAQCard 700 Functional Overview The block diagram in Figure 4 1 shows a functional overview of the DAQCard 700 Instrumentation Amplifier PCMCIA 1 12 Bit Input 1 0 E Channel cas Sampling Mux2 Input ADC 4 Channel Mux1 Interface Dual 8 Channel Single Ended e Scanning Counter OUTO A D Timing had EXTCONV MSM82C54 GATE lt 0 2 gt CLK lt 1 2 gt 1 0 Connector OUT lt 0 2 gt c c 1 ic o Q lt o z o a Interrupt a Interface ai FROMA D FIFO 8 Digital e VO B To Analog Circuit To Analog Circuit DC DC 12V Converter 12V me 1 A Resettable Fuse Figure 4 1 DAQCard 700 Block Diagram National Instruments Corporation 4 1 DAQCard 700 User Manual Theory of Operation Chapter 4 The following are the major components making up the DAQCard 700 e PCMCIA I O channel interface circuitry e Analog input circuitry e Digital I O circuitry Timing I O circuitry Data acquisition functions can be executed by using the analog input circuitry and some of the timing I O circuitry The internal d
38. erate a timing signal at its OUT output pin To count events program a counter to count rising or falling edges applied to any of the MSM82C54 CLK inputs You can then read the counter value to determine the number of edges that have occurred You can gate counter operation on and off during event counting Figure 3 8 shows connections for a typical event counting operation in which a switch is used to gate the counter on and off GATE Counter Signal Source I O Connector DAQCard 700 Figure 3 8 Event Counting Application with External Switch Gating Use level gating to measure pulse width Apply the pulse to be measured to the counter GATE input Load the counter with the known count and program the counter to count down while the signal at the GATE input is high The pulse width equals the counter difference loaded value minus read value multiplied by the CLK period National Instruments Corporation 3 15 DAQCard 700 User Manual Signal Connections Chapter 3 To measure time lapse program a counter to be edge gated Apply an edge to the counter GATE input to start the counter Program the counter to start counting after receiving a low to high edge The time lapse since receiving the edge equals the counter value difference loaded value minus the read value multiplied by the CLK period To measure frequency program a counter to be leve
39. ervices namely 4 to 12 KB which frees more memory for the memory manager Resource Conflicts 1 How do I resolve conflicts between my memory manager and Card Services Card Services can usually use memory space that is not being used for real RAM on the system Even when this is the case you should still exclude the memory addresses used by Card Services from use by any memory manager that may be installed National Instruments Corporation C 3 DAQCard 700 User Manual Appendix D Power Management Modes This appendix describes the power management modes of the DAQCard 700 Normal Mode This is the normal operating mode of the DAQCard 700 in which all the circuits are fully functional This mode draws about 100 mA from the 5 V supply about 500 mW e Power Down Mode In this mode the digital circuitry is powered on and is functional The analog input circuits are powered down by setting the PVRDOWN bit in the PC Card Configuration and Status Register You can set the PVRDOWN bit by using the DAOPOWER utility that is shipped with NI DAQ Use DAQPOWER D to power down and DAQPOWER U to power up the DAQCard 700 This utility is also available in Windows and is installed whenever you install NI DAQ Typically the analog supplies are not reduced to zero negligible power is supplied to the analog circuits This mode draws about 70 mA from the 5 V supply about 350 mW Table D 1 shows the effects of different
40. ft e All input signals share a common reference signal at the source If any one of the preceding criteria is not met use the DIFF input configuration The DAQCard 700 single ended configuration is referenced You can use this mode for nonreferenced signal sources In addition if the computer using the DAQCard 700 is not ground referenced you can use this mode for ground referenced signal sources Figure 3 3 shows how to connect a signal source to a DAQCard 700 in single ended mode When you connect grounded signal sources to a DAQCard 700 in a ground referenced computer carefully observe the polarity to avoid shorting the signal source output A laptop operating from a battery is not grounded A laptop powered from an AC DC adapter may or may not be grounded National Instruments Corporation 3 7 DAQCard 700 User Manual Signal Connections Chapter 3 Operational Signal Amplifier Source Measured M Voltage l O Connector DAQCard 700 Figure 3 3 Single Ended Analog Input Signal Connections Differential Connection Considerations DIFF Configuration Differential connections are those in which each DAQCard 700 analog input signal has its own reference signal or signal return path These connections are available when the DAQCard 700 is configured in the DIFF mode Each input signal is tied to the positive input of the instrumentation amplifier and its reference signal or return is tied to the negative input of the inst
41. his conversion is latched into the FIFO memory within 10 us The EXTCONV input is a TTL compatible signal EXTCONV VIH tw 200 ns Minimum tint 10 us Minimum A D interval A D Conversion Starts Here Figure 3 7 EXTCONV Signal Timing Notice that EXTCONV can only cause conversions to occur you cannot use it as a monitor to detect conversions caused by the onboard sample interval timer General Purpose Counter and Timing Signal Connections The general purpose timing signals include the GATE CLK and OUT signals for the three MSMS382C54 counters except CLK of counter 0 is not available on the I O connector You can use the MSM82C54 counter timers for general purpose applications such as pulse and square wave generation event counting and pulse width time lapse and frequency measurement For these applications CLK and GATE signals are sent to the counters and the counters are DAQCard 700 User Manual 3 14 National Instruments Corporation Chapter 3 Signal Connections programmed for various operations The only exceptions are counter 0 which has an internal 1 MHz clock and counter 1 which can also be configured to use this clock The MSM82C54 counter timer is described briefly in Chapter 4 Theory of Operation For more detailed programming information consult the MSM82C54 Data Sheet in the optional DAQCard 700 Register Level Programmer Manual To perform pulse and square wave generation program a counter to gen
42. ion e Appendix D Power Management Modes describes the power management modes of the DAQCard 700 e Appendix E Customer Communication contains forms you can use to request help from National Instruments or to comment on our products The Glossary contains an alphabetical list and description of terms used in this manual including acronyms abbreviations metric prefixes mnemonics and symbols The ndex alphabetically lists topics covered in this manual including the page number where you can find the topic National Instruments Corporation ix DAQCard 700 User Manual About This Manual Conventions Used in This Manual The following conventions are used in this manual bold italic Bold italic text denotes a note caution or warning italic Italic text denotes emphasis a cross reference or an introduction to a key concept Macintosh Macintosh refers to all Macintosh II Macintosh Quadra and Macintosh Centris computers except the Centris 610 unless otherwise noted NI DAQ NI DAQ is used throughout this manual to refer to the NI DAQ software for Macintosh computers or PC compatibles unless otherwise stated PC PC refers to the IBM PC XT PC AT Personal System 2 and laptop compatible computers which are equipped with a PCMCIA standard version 2 0 or later bus interface and a Type II 5 V capable slot lt gt Angle brackets containing numbers separated by an ellipses represent a range of values associated with
43. ipts or other documentation National Instruments will at its option repair or replace software media that do not execute programming instructions if National Instruments receives notice of such defects during the warranty period National Instruments does not warrant that the operation of the software shall be uninterrupted or error free A Return Material Authorization RMA number must be obtained from the factory and clearly marked on the outside of the package before any equipment will be accepted for warranty work National Instruments will pay the shipping costs of returning to the owner parts which are covered by warranty National Instruments believes that the information in this manual is accurate The document has been carefully reviewed for technical accuracy In the event that technical or typographical errors exist National Instruments reserves the right to make changes to subsequent editions of this document without prior notice to holders of this edition The reader should consult National Instruments if errors are suspected In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it EXCEPT AS SPECIFIED HEREIN NATIONAL INSTRUMENTS MAKES NO WARRANTIES EXPRESS OR IMPLIED AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE CUSTOMER S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIO
44. l gated and count the number of falling edges in a signal applied to a CLK input The gate signal you applied to the counter GATE input is of a known duration In this case program the counter to count falling edges at the CLK input while the gate is applied The frequency of the input signal then equals the count value divided by the gate period Figure 3 9 shows the connections for a frequency measurement application You could also use a second counter to generate the gate signal in this application Ram GATE Signal Gate Source Source P Counter a p I O Connector DAQCard 700 Figure 3 9 Frequency Measurement Application The GATE CLK and OUT signals for counters 1 and 2 are available at the I O connector In addition the GATE and CLK pins are pulled up to 5 V through a 100 kQ resistor Figure 3 10 shows the timing requirements for the GATE and CLK input signals and the timing specifications for the OUT output signals of the MSM82C54 DAQCard 700 User Manual 3 16 National Instruments Corporation Chapter 3 Signal Connections e Absolute maximum voltage input rating 0 5 to 5 0 V with respect to DGND e MSM82C54 digital input specifications referenced to DGND Vy input logic high voltage 2 2 V minimum Vy input logic low voltage 0 8 V maximum Input load current 10 0 LA maximum e MSM82C54 digital output
45. le as using the low level programming described in the register level programmer manual Refer to Software Programming Choices in Chapter 1 Introduction of this manual to learn more about your programming options Customer Communication National Instruments wants to receive your comments on our products and manuals We are interested in the applications you develop with our products and we want to help if you have problems with them To make it easy for you to contact us this manual contains comment and configuration forms for you to complete These forms are in Appendix E Customer Communication at the end of this manual National Instruments Corporation xi DAQCard 700 User Manual Chapter 1 Introduction This chapter describes the DAQCard 700 lists what you need to get started software programming choices and optional equipment and explains how to unpack the DAQCard 700 About the DAQCard 700 Thank you for your purchase of the National Instruments DAQCard 700 The DAQCard 700 is a low cost low power analog input digital and timing I O card for computers equipped with a Type II PCMCIA slot The card contains a 12 bit successive approximation ADC with 16 single ended or 8 differential analog inputs 8 lines of TTL compatible digital input and 8 lines of digital output The DAQCard 700 also contains two 16 bit counter timer channels for timing I O The optional 50 pin I O connector for the DAQCard 700 enables you to easily conn
46. loating Signal Sources A floating signal source is one that is not connected in any way to the building ground system but rather has an isolated ground reference point Some examples of floating signal sources are outputs of transformers thermocouples battery powered devices optical isolator outputs and DAQCard 700 User Manual 3 4 National Instruments Corporation Chapter 3 Signal Connections isolation amplifiers The ground reference of a floating signal must be tied to the DAQCard 700 analog input ground to establish a local or onboard reference for the signal Otherwise the measured input signal varies or appears to float An instrument or device that provides an isolated output falls into the floating signal source category Types of Measurement Systems In addition to determining the type of signal source you also need to determine whether your measurement system is floating or ground referenced These two types of measurement systems are described below Depending on the power connection a portable computer can represent either a floating or ground referenced measurement system If a portable computer is entirely battery powered it is a floating system If it is operated from an AC DC wall adapter it may or may not be ground referenced depending on the connection You should determine from your computer documentation whether any of the power connections are tied to the building power system ground Ground Referenced Measure
47. ment System A ground referenced measurement system is one that is connected in some way to the building system ground Instruments that plug into the building power system fall into this category Floating Measurement System A floating measurement system is one that is not connected in any way to the building ground system but rather has an isolated ground reference point Some examples of floating measurement systems are battery powered instruments instruments powered with a nonground referenced power adapter and instruments with differential inputs A floating measurement system will float to the level of the signals being measured Input Configurations To measure the different types of input signals you can configure the DAQCard 700 for one of two input modes DIFF or RSE These two modes differential and referenced single ended can be implemented by changing the configuration of the instrumentation amplifier onboard the DAQCard 700 Figure 3 2 shows a diagram of the DAQCard 700 instrumentation amplifier National Instruments Corporation 3 5 DAQCard 700 User Manual Signal Connections Chapter 3 Instrumentation Amplifier V Measured Voltage V m Vint Vin GAIN Figure 3 2 DAQCard 700 Instrumentation Amplifier The DAQCard 700 instrumentation amplifier applies common mode voltage rejection and presents a high input impedance to the analog input signals connected to the DAQCard 700 Signals are routed to the positive
48. n cable This section contains information and guidelines for the design of custom cables The PR 50 50M is terminated in a 50 pin male ribbon cable header connector The mating connector for this cable is a 50 position polarized ribbon socket connector with strain relief National Instruments uses a polarized keyed connector to prevent inadvertent upside down connections to the DAQCard 700 Recommended manufacturer part numbers for this mating connector are as follows e Electronic Products Division 3M part number 3425 7650 e T amp B Ansley Corporation part number 609 5041CE The PR 50 50F is terminated in a 50 pin female ribbon cable socket connector The mating connector for this cable is a 50 position polarized ribbon socket header National Instruments uses a polarized keyed connector to prevent inadvertent upside down connection to the DAQCard 700 Recommended manufacturer part numbers for this mating connector are as follows Electronic Products Division 3M part number 3433 6302 DuPont part number 71912 150 The following are the standard ribbon cables 50 conductor 28 AWG stranded that work with these connectors e Electronic Products Division 3M part number 3365 50 e T amp B Ansley Corporation part number 171 50 The PCMCIA I O cable connector like the card connector attached to the card itself is a unique custom designed part It is only available as part of the PR 50 50 cable assembly DAQCard 700 Us
49. n questions and answers relating to PC Card PCMCIA operation The questions are grouped according to the type of information requested You may find this information useful if you are having difficulty with the PCMCIA system software configuration Configuration 1 Do I need to use my PCMCIA configuration utility to configure the National Instruments PC Cards No We recommend that you do not configure our PC Cards using PC Card Control or an equivalent PC Card configuration utility Use the configuration utilities included with the NI DAQ driver software to properly configure your card The appropriate utilities are WDAQCONF for Windows users or DAQCONF for DOS users 2 What should I do if my computer does not have Card and Socket Services version 2 0 or later Contact the manufacturer of your computer or of your PCMCIA adapter and request the latest Card and Socket PCMCIA driver Our NI DAQ software will work with any Card and Socket Service driver that is compliant to version 2 0 or later Operation 1 My PC Card works when inserted before power on time but it does not work when hot inserted What is wrong You may have an interrupt conflict If you have a utility such as MSD EXE run it to determine the allocated interrupts then refer to question 5 in the Resources section MSD EXE is usually shipped with Microsoft Windows 2 My computer locks up when I use a PC Card What should I do This usually happens b
50. nnel signal analog to digital A D converter analog input ground signal American Wire Gauge binary coded decimal Celsius card enable signal clock input signal complementary metallic oxide semiconductor common mode rejection ratio digital to analog data acquisition direct current digital ground signal differential configuration digital input signal direct memory access differential nonlinearity digital output signal Extended Industry Standard Architecture Engineering Software Package external control signal to trigger A D conversions external interrupt signal farads first in first out gate input signal Glossary 1 DAQCard 700 User Manual Glossary hex hexadecimal Hz hertz in inches VO input output ISA Industry Standard Architecture LED light emitting diode LSB least significant bit MB megabytes of memory MSB most significant bit NC not connected signal NRSE nonreferenced single ended OUT output signal PCMCIA Personal Computer Memory Card International Association RAM random access memory RMA Return Material Authorization rms root mean square S samples S seconds SCXI Signal Conditioning eXtensions for Instrumentation TTL transistor transistor logic V volts VCC positive supply voltage from the PCMCIA bus usually 5V VDC volts direct current VI virtual instrument VIH volts input high VIL volts input low Vin volts in VOH volts output high VOL volts output low DAQCard
51. nts generate pulses and measure frequency and time The DAQCard 700 used in conjunction with your computer is a versatile cost effective platform for laboratory test measurement and control Detailed specifications of the DAQCard 700 are in Appendix A Specifications National Instruments Corporation 1 1 DAQCard 700 User Manual Introduction Chapter 1 What You Need to Get Started To set up and use your DAQCard 700 you will need the following J DAQCard 700 a One of the following I O cables must be purchased separately PR50 50M ribbon cable 6 in PR50 50F ribbon cable 0 5 1 or 2 m CI Connector block for signals J DAQCard 700 User Manual Ci NI DAQ software with documentation LJ Your computer Software Programming Choices There are several options to choose from when programming your National Instruments DAQ and SCXI hardware You can use LabVIEW LabWindows CVI or NI DAQ LabVIEW and LabWindows CVI Application Software LabVIEW and LabWindows CVI are innovative program development software packages for data acquisition and control applications LabVIEW uses graphical programming whereas LabWindows CVI enhances traditional programming languages Both packages include extensive libraries for data acquisition instrument control data analysis and graphical data presentation LabVIEW features interactive graphics a state of the art user interface and a powerful graphical programming language The LabV
52. ompleted copy of this form as a reference for your current configuration Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently If you are using any National Instruments hardware or software products related to this problem include the configuration forms from their user manuals Include additional pages if necessary Name Company Address Fax ___ Phone ___ Computer brand Model Processor Operating system Speed MHz RAM MB Display adapter Mouse yes no Other adapters installed Hard disk capacity MB Brand Instruments used National Instruments hardware product model Revision Configuration National Instruments software product Version Configuration The problem is List any error messages The following steps will reproduce the problem DAQCard 700 Hardware and Software Configuration Form Record the settings and revisions of your hardware and software on the line to the right of each item Complete a new copy of this form each time you revise your software or hardware configuration and use this form as a reference for your current configuration Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently National Instruments Products e LabVIEW LabWindows CVI or NI DAQ Version e PCMCIA Software Versi
53. on Other Products e Computer Make and Model e Microprocessor e Clock Frequency e Type of Video Board Installed e Operating System e Operating System Version e Programming Language e Programming Language Version e Other Boards in System e Base I O Address of Other Boards e DMA Channels of Other Boards e Interrupt Level of Other Boards Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products This information helps us provide quality products to meet your needs Title _DAQCard 700 User Manual Edition Date January 1996 Part Number 320676C 01 Please comment on the completeness clarity and organization of the manual If you find errors in the manual please record the page numbers and describe the errors Thank you for your help Name Title Company Address Phone Mail to Technical Publications Fax to Technical Publications National Instruments Corporation National Instruments Corporation 6504 Bridge Point Parkway 512 794 5678 Austin TX 78730 5039 Glossary ACH A D ADC AIGND AWG BCD C CE CLK CMOS CMRR D A DAQ DC DGND DIFF DIN DMA DNL DOUT EISA ESP EXTCONV EXTINT F FIFO GATE National Instruments Corporation degrees ohms percent amperes alternating current analog input cha
54. ples Dat transfers eim e ERR RERO Interrupts programmed I O Transfer Characteristics Relative accuracy esee eques 1 LSB typ 1 5 LSB max DNE untere quete 0 5 LSB typ 1 LSB max No missing codes essere eene 12 bits guaranteed Offset error After software calibration essere 1 LSB Before software calibration 2 LSB typ 9 LSB max Gain error relative to calibration reference After software calibration serene 0 036 max Before software calibration 0 07 of reading typ 0 4 max Amplifier Characteristics Inputampedance 2 gc ep repeteret 1 GQ in parallel with 40 pF CMRR all input ranges eseeesseeeseseeseseereerresreresrerrsreeesrreene 72 dB DC to 60 Hz 1 Please refer to the Dynamic Characteristics section for maximum scan rates with stated accuracy National Instruments Corporation A 1 DAQCard 700 User Manual Specifications Appendix A Dynamic Characteristics Settling time 0 024 accuracy 1 LSB for full scale step eee 25 us max at 10 V 5 V 10 us at 2 5 V RSE System nolse asp e UR OO UU PER EURO aes 0 5 LSB rms at 5 V range Stability Recommended warm up time eee 15 min Onboard calibration reference Level ER ne ees 3 0 V 0 2 mV Temperature coefficient 60 ppm C max Digital I O Number of channels essere 8 inpu
55. power management modes on the DAQCard 700 circuits Table D 1 DAQCard 700 Power Management Modes aa Normal Mode Power Down Mode Calibration Circuitry Digital I O Counters National Instruments Corporation Functional Defaults to bipolar 10 V RSE Protected to 30 V Impedance gt 1 GQ Functional Offset and Gain values can be read from the card information structure Functional Digital Output defaults to 0 Protected from 0 5 to 5 5 V Functional Initialize to undefined states Individual counters of the 82C54 must be fully programmed before use Protected from 0 5 to 5 5 V Nonfunctional Draws negligible power Protected to 30 V Impedance 4 7 kQ which is the input protection resistance Functional Offset and Gain values can be read from the card information structure Functional Digital Output defaults to 0 Protected from 0 5 to 5 5 V Functional Initialize to undefined states Individual counters of the 82C54 must be fully programmed before use Protected from 0 5 to 5 5 V DAQCard 700 User Manual Appendix E Customer Communication For your convenience this appendix contains forms to help you gather the information necessary to help us solve technical problems you might have as well as a form you can use to comment on the product documentation Filling out a copy of the Technical Support Form before contacting National Instruments helps us help you better and faster
56. rations The following sections discuss the use of single ended and differential measurements and considerations for measuring both floating and ground referenced signal sources Table 3 1 summarizes the recommended input configurations for both types of signal sources Table 3 1 Recommended Input Configurations for Ground Referenced and Floating Measurement Systems System Type Type of Signal Recommended Input Configurations Ground referenced system Ground referenced DIFF such as a desktop computer nonisolated outputs plug in instruments Floating DIFF with bias resistors batteries thermocouples isolated outputs RSE Floating system such as a Ground referenced DIFF with bias resistors battery powered computer nonisolated outputs plug in instruments RSE Floating DIFF with bias resistors batteries thermocouples isolated outputs RSE Single Ended Connection Considerations Single ended connections are those in which all DAQCard 700 analog input signals are referenced to one common ground The input signals are tied to the positive input of an operational amplifier that is referenced to their common ground point When the DAQCard 700 is configured for single ended input 16 analog input channels are available You can use single ended input connections when the following criteria are met by all input signals e Input signals are high level greater than 1 V e Leads connecting the signals to the DAQCard 700 are less than 15
57. riptlQfis sssrinin node set E i tese cete viget bv eodd 3 3 Analog Input Signal Connections ss 3 4 Typ s of Signal Sources inner ieee ns 3 4 Ground Referenced Signal Sources sess 3 4 Floating Signal Sources ape eder erotica lanes 3 4 Types of Measurement S ySUTHIS Se penes tc cea ne Hr Ras ein 3 5 Ground Referenced Measurement System sss 3 5 Floating Measurement System 3 5 Input Configurations iet cisci eo hee ert P bie Pedo ec eee eda E eren consis 3 5 Smgle Ended MO fn nes tintin e v oed 3 6 Differential Mode eoe Oe nd ee UL teste 3 6 Recommended Input Configurations eee 3 7 Single Ended Connection Considerations esses 3 7 National Instruments Corporation v DAQCard 700 User Manual Contents Differential Connection Considerations DIFF Configuration 3 8 Differential Connections for Grounded Signal Sources 3 9 Differential Connections for Floating Signal Sources 3 10 Common Mode Signal Rejection Considerations 3 11 Digital I O Signal Connections sioe ro eoe ees deret Quse tes ecd bes eed lent nt ea 3 12 Power COnN CNAS EE EL LU TS Er en Te da en eu dif 3 13 Timina CORNE HORS AU AU A Re nd i MA nd 3 14 Data Acquisition Counter and Timing Connections 3 14 General Purpose Counter and Timing Signal Connections 3 14 aru D
58. rumentation amplifier When the DAQCard 700 is configured for DIFF input each signal uses two of the multiplexer inputs one for the signal and one for its reference signal Therefore only eight analog input channels are available when using the DIFF configuration The DIFF input configuration should be used when any of the following conditions are present e Input signals are low level less than 1 V e Leads connecting the signals to the DAQCard 700 are greater than 15 ft Any of the input signals requires a separate ground reference point or return signal e The signal leads travel through noisy environments DAQCard 700 User Manual 3 6 National Instruments Corporation Chapter 3 Signal Connections Differential signal connections reduce picked up noise and increase common mode signal and noise rejection With these connections input signals can float within the common mode limits of the input instrumentation amplifier Differential Connections for Grounded Signal Sources Figure 3 4 shows how to connect a ground referenced signal source to a DAQCard 700 card configured for DIFF input Ground Referenced Signal Instrumentation Source Amplifier Measured Voltage Common Mode Noise Ground Potential and so on 1 0 Connector DAQCard 700 Board in DIFF Configuration Figure 3 4 Differential Input Connections for Grounded Signal Sources With this type of connection the instrumentation amplifier r
59. s both high level DAQ I O functions for maximum ease of use and low level DAQ I O functions for maximum flexibility and performance Examples of high level functions are streaming data to disk or acquiring a certain number of data points An example of a low level function is writing directly to registers on the DAQ device NI DAQ does not sacrifice the performance of National Instruments DAQ devices because it lets multiple devices operate at their peak performance up to 500 kS s on ISA computers and up to 1 MS s on EISA computers NI DAQ also internally addresses many of the complex issues between the computer and the DAQ hardware such as programming interrupts and DMA controllers NI DAQ maintains a consistent software interface among its different versions so that you can change platforms with minimal modifications to your code Figure 1 1 illustrates the relationship between NI DAQ and LabVIEW and LabWindows CVI You can see that the data acquisition parts of LabVIEW and LabWindows CVI are functionally equivalent to the NI DAQ software Conventional Programming LabVIEW LabWindows CVI Environment PC Macintosh or PC or Sun PC Macintosh or Sun SPARCstation SPARCstation Sun SPARCstation NI DAQ Driver Software DAQ or Personal Computer or SCXI Hardware Workstation Figure 1 1 The Relationship between the Programming Environment NI DAQ and Your Hardware National Instruments Corporation 1 3 DAQCard 700 User Manual
60. s for DAQCard 700 pulse and square wave generation 3 15 pulse width measurement 3 15 R referenced single ended input See RSE input register level programming 1 4 resources C 2 to C 3 RSE input configuration 2 4 definition table 2 4 S signal connections DAQCard 700 User Manual DAQCard 700 User Manual Index analog input signal connections differential DIFF connections 3 8 to 3 11 common mode signal rejection considerations 3 11 floating signal sources 3 10 to 3 11 grounded signal sources 3 9 differential input mode 3 6 exceeding maximum input rating warning 3 4 floating measurement systems 3 5 floating signal sources 3 4 to 3 5 ground referenced measurement systems 3 5 ground referenced signal sources 3 4 input configurations 3 5 to 3 6 instrumentation amplifier 3 6 pins for analog input 3 4 recommended input configurations 3 7 single ended connection considerations 3 7 to 3 8 single ended input mode 3 6 types of measurement systems 3 5 types of signal sources 3 4 to 3 5 cabling 3 18 digital I O signal connections 3 12 to 3 13 I O connector exceeding maximum ratings warning 3 1 pin assignments illustration 3 2 power connections 3 13 signal descriptions 3 3 timing connections 3 14 to 3 17 data acquisition counter and timing connections 3 14 general purpose counter and timing signals 3 14 to 3 17 event counting applications 3 15 frequency measurement 3 16
61. specifications referenced to DGND Vgg output logic high voltage 3 0 V minimum Voy output logic low voltage 0 40 V maximum log output source current at Voy 2 5 mA maximum Io output sink current at VoL 2 5 mA maximum clock period 100 ns minimum clock high level 30 ns minimum clock low level 50 ns minimum gate setup time 40 ns minimum gate hold time 50 ns minimum gate high level 50 ns minimum gate low level 50 ns minimum output delay from clock v 100 ns maximum output delay from gate Y 100 ns maximum Figure 3 10 General Purpose Timing Signals The GATE and OUT signals in Figure 3 10 are referenced to the rising edge of the CLK signal National Instruments Corporation 3 17 DAQCard 700 User Manual Signal Connections Chapter 3 Cabling National Instruments currently offers two different cables for use with the DAQCard 700 the PR 50 50F and the PR 50 50M National Instruments also offers a cable termination accessory the CB 50 for use with the DAQCard 700 This kit includes a terminated 50 conductor flat ribbon cable and a connector block You can attach signal input and output wires to screw terminals on the connector block and therefore to the DAQCard 700 I O connector The CB 50 is useful for the initial prototyping of an application or in situations in which the DAQCard 700 interconnections are frequently changed After you develop a final field wiring scheme however you may want to develop your ow
62. stems 3 7 Table D 1 DAQCard 700 Power Management Modes ss D 1 National Instruments Corporation vii DAQCard 700 User Manual About This Manual This manual describes the mechanical and electrical aspects of the DAQCard 700 and contains information concerning its installation and operation The DAQCard 700 is a compact low cost low power analog input digital and timing I O card for computers that are equipped with a Type II PCMCIA socket Organization of This Manual The DAQCard 700 User Manual is organized as follows e Chapter 1 Introduction describes the DAQCard 700 lists what you need to get started software programming choices and optional equipment and explains how to unpack the DAQCard 700 e Chapter 2 Installation and Configuration describes how to install and software configure the DAQCard 700 e Chapter 3 Signal Connections describes the signals on the DAQCard 700 I O connector as well as typical cable setups e Chapter 4 Theory of Operation includes an overview of the DAQCard 700 and explains the operation of each functional unit making up the DAQCard 700 Appendix A Specifications lists the specifications of the DAQCard 700 e Appendix B Differences between the PC LPM 16 and the DAQCard 700 contains a summary of differences between these two products that may be relevant to you e Appendix C PC Card Questions and Answers contains a list of common questions and answers relating to PC Card operat
63. struments Corporation Product and company names listed are trademarks or trade names of their respective companies WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS National Instruments products are not designed with components and testing intended to ensure a level of reliability suitable for use in treatment and diagnosis of humans Applications of National Instruments products involving medical or clinical treatment can create a potential for accidental injury caused by product failure or by errors on the part of the user or application designer Any use or application of National Instruments products for or involving medical or clinical treatment must be performed by properly trained and qualified medical personnel and all traditional medical safeguards equipment and procedures that are appropriate in the particular situation to prevent serious injury or death should always continue to be used when National Instruments products are being used National Instruments products are NOT intended to be a substitute for any form of established process procedure or equipment used to monitor or safeguard human health and safety in medical or clinical treatment Contents About This VE aa al sonet REO OUR UO Het oq oa ae pri umen ix Organization of This Manual trt eet rai te enean eae I Ue Ense e lee og ER PUE ix Conventions Used in This Manual tes ame nine en ee aan tutta didici puedes X National Instruments Documenta
64. t and 8 output Compatibility 2 2 m ter p ERR rers TTL Digital logic levels Input low voltage Input high voltage Input low current Vin 0 V Input high current Vin 5 V Output low voltage out 4 mA Output high voltage lout 4 mA Timing I O Number of channels sseeeeeenee 3 counter timers 1 dedicated to analog input Resolution ose o eame REP 16 bits Compatibility 3 22i e tpi p RR tec ns TTL gate and source pulled high with 100 kQ resistors Base clocks available essere 1 MHz Base clock accuracy rettet tere ee eee 0 01 Max source frequency nee enne 10 MHz Min source pulse duration 50 ns Min gate pulse duration 50 ns Datta transfers oes cenobio one nti Programmed I O Bus Interface DAQCard 700 User Manual A 2 National Instruments Corporation Appendix A Specifications Power Requirement 45 MDC 499 ais ou ERA Ee e easi e Ads 100 mA in operational mode 70 mA in power down mode Note These power usage figures do not include the power used by external devices that you have connected to the fused supply present on the I O connector Physical PCO Card type 4 nr pete o eh dt ies Type II I O connector ee deferens 50 pin male Environment Operating temperature neret 0 to 70 C Storage temperature oe eee eee eceseeeeeeseeceecseecaecnsesaeenaes 55 to 150 C Relative WU ity iit ERR Eis 59
65. tation Amplifier I O Connector c c s Z o 9 ES o z o n Figure 4 3 Analog Input and Data Acquisition Circuitry Block Diagram Analog Input Circuitry The analog input circuitry consists of an input multiplexer a software selectable gain stage and a 12 bit sampling ADC The 12 bit output is sign extended to 16 bits then stored in a 512 word deep FIFO memory The input multiplexer stage is made up of two CMOS analog input multiplexers In single ended mode the input multiplexers switch between 16 analog input channels channels 0 through 15 In differential mode one of the input multiplexers switches between eight differential pairs channels 0 and 8 1 and 9 and so on With the input multiplexer stage input overvoltage protection of 30 V is available powered on or off The DAQCard 700 uses a 12 bit successive approximation ADC Software selectable gains of 1 0 5 and 0 25 for the input signal combined with the ADC fixed input range of 10 V yield three useful analog input signal ranges These ranges are 10 V 5 V and 2 5 V When an A D conversion is complete the ADC clocks the result into the A D FIFO The A D FIFO is 16 bits wide and 512 words deep This FIFO serves as a buffer to the ADC and has two benefits First when an A D conversion is complete the value is saved in the A D FIFO for later reading and the ADC is free to start a new conversion Secondly the A D FIFO can collect up to 512 A
66. that you can insert it only one way Insert the DAQCard 700 and attach the I O cable The DAQCard 700 has two connectors a 68 pin PCMCIA bus connector on one end and a 50 pin I O connector on the other end Insert the PCMCIA bus connector into any available Type II PCMCIA slot until the connector is seated firmly Notice that the card is keyed so that it can be inserted only one way If your computer supports hot insertion you may insert or remove the DAQCard 700 at any time whether your computer is powered on or off The optional I O cables available for the DAQCard 700 plug into the 50 pin I O connector and connect to National Instruments products such as the CB 50 and the BNC 2080 Notice that the cable is keyed so that you can insert it only one way Be very careful not to put strain on the I O cable when inserting it into and removing it from the DAQCard 700 Always grasp the cable by the connector you are plugging or unplugging Never pull directly on the I O cable to unplug it from the DAQCard 700 Figure 2 1 shows an example of a typical configuration National Instruments Corporation 2 1 DAQCard 700 User Manual Installation and Configuration Chapter 2 Portable Computer PCMCIA Socket 1 0 Cable I O Signals Figure 2 1 A Typical Configuration for the DAQCard 700 The DAQCard 700 is now installed You are ready to make the appropriate connections to the I O connector cable as described in Chapter 3 Signal
67. tion Chapter 4 Timing I O Circuitry The DAQCard 700 uses an MSM82C54 counter timer integrated circuit for data acquisition timing and for general purpose timing I O functions Three counters of the MSM82C54 are available for general use but one of them can be used internally for data acquisition timing Figure 4 5 shows a block diagram of both groups of timing I O circuitry A D Conversion Logic CTR RD WR ae GATE2 OUT2 c c oO O Q lt O O n I O Connector MSM82C54 Counter Timer Interrupt Interface Figure 4 5 Timing I O Circuitry Block Diagram The MSM82C54 contains three independent 16 bit counter timers and one 8 bit Mode Register As shown in Figure 4 5 counter 0 can be used for data acquisition timing and counters and 2 are free for general use All three counter timers can be programmed to operate in several useful timing modes The programming and operation of the MSM82C54 is presented in detail in the optional DAQCard 700 Register Level Programmer Manual The MSM82C54 for counter 0 uses a 1 MHz clock generated from the onboard oscillator The timebases for counters 1 and 2 can be supplied externally through the 50 pin I O connector In addition counter 1 can optionally use the same onboard 1 MHz clock that is used for data acquisition timing which facilitates synchronous operations The 16 bit counters in the MSMS2C54 can be diagrammed as shown in Figure 4 6 DAQCard 700 User Manual 4
68. tion and generate scanning clocks Sources for these signals are supplied mainly by timers on the DAQCard 700 card One of the three counters of the onboard MSM82C54 is reserved for this purpose An A D conversion can be initiated during data acquisition by a low to high transition on the counter 0 output OUTO of the MSM82C54 onboard counter timer chip on the DAQCard 700 or by a low to high transition on EXTCONV input The sample interval timer is a 16 bit down counter that uses the onboard 1 MHz clock to generate sample intervals from 2 us to 65 535 us see Timing 1 0 Circuitrylater in this chapter Each time the sample interval timer reaches zero it generates a pulse and reloads with the programmed sample interval count This operation continues until the counter is reprogrammed Notice that only counter 0 is required for data acquisition operations The software must track the number of conversions that have occurred and turn off counter 0 after the required number has been obtained Single Channel Data Acquisition During single channel data acquisition a control register is set to select the analog input channel before data acquisition is initiated This multiplexer setting remains constant during the entire data acquisition process therefore all A D conversion data is read from a single channel Multichannel Scanned Data Acquisition Multichannel data acquisition is performed by enabling scanning during data acquisition Multich
69. tion ss X Related Docurientation sete ed teste oce IUE nr aden tese he t s essel ne aes xi Customer Communication 2 eevee eee elas dee tete Pere diee ea Eu ees deb QURE a da De denses xi Chapter 1 IntrFod cHon one ERI ne 1 1 About the DAOC ar TOO 45 etre ES eee tpe des Ee euet 1 1 What You Need to Get Started in eie nce Loro ecc ea ete Ie Ua pae pe no ea dva ds 1 2 Software Programming Choices iie eese esque ed ees v UN Fo Res net Ru oa eh Ried pa Eden 1 2 LabVIEW and LabWindows CVI Application Software ssss 1 2 NI DAQ Driver Software 1 3 Register Level Programming ionic tintin 1 4 Unpacking ocu ascen tar Ufa dS catum ask t nice pr pU eri EVE 1 4 Chapter 2 Installation and Configuration 2 1 Installation siens in ni dan erent de Ror nes 2 1 GG DIVA AU OND o Scns saa ta tls Re ROREM UN M ut me edu eR Oto Do cuo eRe RoR 2 2 Analog I O Configuration ioter oen etie to eara osa oaa e o eda E erede RES 2 3 Analog Input Mode ioc tabes tus tenute douce ope qao phus oi eat abra save cays 2 3 duni pe D 2 4 DIFF nita intet de it those uti tec cult tides 2 4 Digital VO Configuratii t Sen osea Sota Dist nn nr at cn State 2 5 Counter Configuratii iud neat eL ee Be on cruor adem Ge it 2 5 Chapter 3 Signal Connections 5655s sec ei sut aset Retail 3 1 l iGXGvii T i Rue 3 1 Signal Connection DeSsc
70. tions These settling time specifications assume that voltage levels on all the channels included in the scan sequence are within range and are driven by low impedance sources Signal levels outside the ranges on the channels included in the scan sequence adversely affect the input settling time Similarly greater settling time may be required for channels driven by high impedance signal sources DAQCard 700 User Manual 4 6 National Instruments Corporation Chapter 4 Theory of Operation Digital I O Circuitry The DAQCard 700 has 16 digital I O lines that are TTL compatible Pins DIN lt 0 7 gt of the I O connector are digital input lines and pins DOUT lt 0 7 gt are digital output lines These lines are monitored or driven by the Digital Input Register or the Digital Output Register respectively Reading the Digital Input Register returns the current state of DIN lt 0 7 gt lines Writing the Digital Output Register drives the new value onto DOUT O 7 lines The external device may drive the EXTINT signal to signal the readiness of data transfer Figure 4 4 shows a diagram of this circuitry DIN lt 0 7 gt Digital Input Register DOUT lt 0 7 gt Digital Output Register Status EXTINT Register Interrupt Interface I O Connector E c c s c Oo 9 lt O O oO Figure 4 4 Digital I O Circuitry Block Diagram National Instruments Corporation 4 7 DAQCard 700 User Manual Theory of Opera
71. truments Corporation I input configurations 3 5 to 3 7 DIFF definition table 2 4 purpose 2 4 differential mode 3 6 instrumentation amplifier illustration 3 6 purpose 3 6 recommended input configurations table 3 7 RSE definition table 2 4 purpose 2 4 single ended mode 3 6 installation See also configuration steps for installing DAQCard 700 2 1 to 2 2 unpacking the DAQCard 700 1 4 instrumentation amplifier illustration 3 6 purpose and use 3 6 interrupt levels C 2 I O connector exceeding maximum ratings warning 3 1 pin assignments illustration 3 2 L LabVIEW and LabWindows CVI application software 1 2 M management power modes D 1 manual See documentation measurement systems floating 3 5 ground referenced 3 5 memory C 2 to C 3 multichannel scanned data acquisition 4 5 National Instruments Corporation Index 3 Index N NI DAQ driver software 1 3 O operation of DAQCard 700 See also theory of operation problems with C 1 OUT GATE and CLK signals for general purpose timing 3 14 to 3 17 OUTO signal 3 3 OUT signal 3 3 OUT1 signal 3 3 OUT2 signal 3 3 P PC LPM 16 compared with DAQCard 700 B 1 PCMCIA I O channel interface circuitry 4 2 to 4 3 questions and answers C 1 to C 3 physical specifications A 2 power connections 3 13 power management modes D 1 power requirement for DAQCard 700 A 2 programming See software programming choice
72. un it to determine what interrupts Card Services can use Card Services needs an interrupt for itself as well as one interrupt for each PCMCIA socket in the system For example in a system with two PCMCIA sockets at least three interrupts should be allocated for use by Card Services DAQCard 700 User Manual C 2 National Instruments Corporation Appendix C PC Card Questions and Answers Keep in mind that utilities such as MSD EXE will sometimes report that an interrupt is in use when it really is not For example if the computer has one serial port COM1 and one parallel port LPT1 you know that IRQs 4 and 7 are probably in use In general IRQ5 is used for LPT2 but if the computer does not have two parallel ports IRQ5 should be usable IRQ3 is used for COMO but if the computer has only has one serial port IRQ3 should be usable 5 I run a memory utility and it appears there is no memory available for Card Services What should I do You should remove your memory manager by commenting it out of the CONFIG SYS file Next you can rerun the memory utility Memory managers often consume an enormous amount of memory and you will need to determine what memory is really usable by Card Services When you have determined what memory is available for Card Services reinstall your memory manager and make the necessary changes to provide Card Services with the memory needed We suggest that you use the minimum amount of memory for Card S

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