USB-7202 User`s Guide - Measurement Computing
Contents
1. 19 Digital input output ete UE S irt p SERE eve et ERU Ure o Lee iii 20 External Migrar bo o eee ho e b ei terit ose b I eic aree 20 External clock input output tete reet IR eer eU uaa entente 21 Counter ire nement RE Ten pen edo data Pme EE 21 Mei OA a nS REIR 21 Microcontrollers satin et Rt en er bie A ennemies ten nr rt in site esse 22 Indicator P EE 22 lvi dM E 22 USB 7202 User s Guide cR 23 Ioni 23 Mechanit al cette aid 23 Screw terminal connector and pinoUt ses repetit petere ee etie pce ie e ip ee eee 23 OEM connector and pinout Pia nt nant docte eoo tr Re rae aet decente eed ce Eee oes ee eee Pee eT 25 Trigger Sync connector and pinout PS nre enne nennen trente entren rennen ens 25 Preface About this User s Guide This document describes the Measurement Computing USB 7202 data acquisition device and lists device specifications Conventions For more information Text presented in a box signifies additional information related to the subject matter Caution Shaded caution statements present information to help you avoid injuring yourself and others damaging your hardware or losing your data bold text Bold text is used for the names of objects on a screen such as buttons text boxes and check boxes italic text Italic text is used f2. OEM connector and pinout P4 Table 18 OEM connector specifications Parameter Specification Connector type 10 position 2 54 mm 0 1 in box header Table 19 OEM connector pinout Pin Signal Name Pin Signal Name 1 N C 2 VBUS fuse protected 3 N C 4 D 5 N C do not connect anything to this pin 6 D 7 N C do not connect anything to this pin 8 GND 9 N C do not connect anything to this pin 10 SHIELD Trigger Sync connector and pinout P5 Table 20 Trigger Sync connector specifications Parameter Specification Connector type 10 position 2 54 mm 0 1 in box header Table 21 Trigger Sync connector pinout Pin Signal Name Pin Signal Name 1 TRIG IN 2 GND 3 N C 4 GND 5 SYNC 6 GND 7 N C 8 GND 9 N C 10 N C 25 Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton Massachusetts 02766 508 946 5100 Fax 508 946 9500 E mail info mccdag com www mccdag com
3. 67 1 V 14 2 12 Digital input output Table 5 Digital I O specifications Parameter Specification Digital type CMOS Number of I O 8 DIOO through DIO7 Configuration Independently configured for input or output Pull up pull down All pins configurable via jumper JP1 to Vs or ground via 47 kQ resistors configuration Input high voltage 2 0 V min 5 5 V absolute max Input low voltage 0 8 V max 0 5 V absolute min Output high voltage 3 8 V min IOH 2 5 mA Output low voltage 0 7 V max IOL z 2 5 mA Power on and reset state Input External trigger Table 6 External trigger specifications Parameter Conditions Specification Trigger source Note 2 External digital TRIG IN Trigger mode Software selectable Edge sensitive user configurable for CMOS compatible rising or falling edge Trigger latency 10 us max Trigger pulse width lus min Input high voltage 4 0 V min 5 5 V absolute max Input low voltage 1 0 V max 0 5 V absolute min Input leakage current 1 OuA Note 2 TRIG_IN is a Schmitt trigger input protected with a 1 5K Ohm series resistor 20 USB 7202 User s Guide Specifications External clock input output Table 7 External clock I O specifications Parameter Conditions Specification Pin name SYNC Pin type Bidirectional Software sele
4. N C do not connect anything to this pin 10 SHIELD 11 USB 7202 User s Guide Functional Details Modifications are required in order to use the OEM connector We recommend that you return the device to the factory for this modification Should you have the capabilities to perform the modifications the following change is required in order to create a USB connection via the OEM connector locations R30and R36 must be populated We recommend that you populate with 0603 size 0 Q resistors or provide solder bridges to close the gaps Trigger Sync connector The Trigger Sync connector provides two signals SYNC and TRIG IN These signals are also available on the screw terminal refer to Trigger input on page 14 for details about these signals Trigger Sync connector pinout Pin Signal Name Pin Signal Name 1 TRIG IN 2 GND 3 N C 4 GND 5 SYNC 6 GND 7 N C 8 GND 9 N C 10 N CD Use a 0 1 box header when making connections to the Trigger Sync connector The Trigger Sync connector internally connects its SYNC and TRIG_IN pins to the screw terminal via jumpers P6 and P7 1 5k Microcontroller SYNC Microcontroller ne IN TRIG_IN Trigger Sync P7 Screw connector terminal Figure 3 Jumper P6 and P7 schematic Sync jumper P6 The Sync jumper internally connects the SYNC pin on the Trigger Sync connector to the SYNC pin on the screw terminal Remove this jumper on
5. boards that will not send receive the SYNC signal through the SYNC TRIG connector Refer to Figure 2 on page 11 for the location of this jumper Trigger jumper P7 The Trigger jumper internally connects the TRIG IN pin on the Trigger Sync connector to the TRIG IN pin on the screw terminal Remove this jumper on boards that will not send receive the TRIG signal through the SYNC TRIG connector Refer to Figure 2 on page 11 for the location of this jumper LED indicators The USB 7202 has LEDs for power and communication status See Figure 2 on page 11 for the location of each LED LED type Indication Power Steady green The device microcontroller is connected to a computer or external USB hub Status Blinking green data is being transferred over the USB bus USB 7202 User s Guide Functional Details Screw terminals Screw terminal connections in shown in Figure 4 Trigger Sync connector MC Ground GND O 20 AGND Analog ground Power output 5Vuser Spare fuse ap or ad 19 AGND Analog ground Counter input CTR G 18 AGND Analog ground Trigger input TRIG_IN O 17 NC No connection Synchronous I O SYNC O 16 AGND Analog ground DIO channel 7 DIO7 O O 15 CH7IN Alchannel 7 Ground GND 14 AGND Analog ground DIO channel 6 DIO6 G O 13 CH6IN Alchannel 6 Ground GND GS 12 AGND Analog ground DIO channel 5 DIO5 O O 11 CH5IN Al channel 5 Ground GND G 10 AGND Analog ground DIO
6. has lost communication with the USB 7202 To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the Power LED should turn on USB 7202 User s Guide Installing the USB 7202 Calibrating the hardware Factory calibration The Measurement Computing Manufacturing Test department performs the initial factory calibration Contact Measurement Computing for details about how to return your device and have it calibrated to the factory specifications Field calibration The USB 7202 supports field calibration Calibrate the device using InstaCal whenever the ambient temperature changes by more than 10 C from the last calibration Chapter 3 Functional Details Analog input acquisition modes The USB 7202 can acquire analog input data in three different modes software paced hardware paced or BURSTIO Software paced You can acquire one analog sample at a time in software paced mode You initiate the A D conversion by calling a software command The analog value is converted to digital data and returned to the computer You can repeat this procedure for each channel desired until you have the total number of samples that you want from each channel The maximum throughput sample rate in software paced mode is about 250 S s but may vary depending on your system You may receive OVERRUN errors at higher rates on some platforms Using the BURSTIO
7. in the computer USB host Controller The USB port s on your computer are root port hubs All externally powered root port hubs desktop computers provide up to 500 mA of current for a USB device Battery powered root port hubs provide 100 mA or 500 mA depending upon the manufacturer A laptop computer that is not connected to an external power adapter is an example of a battery powered root port hub If your laptop computer is constrained to the 100 mA maximum you need to purchase a self powered hub Note 7 This is the total amount of current that can be sourced from the 5 VUSER and digital outputs Fuse for 5V terminal is rated at 375 mA 22 USB 7202 User s Guide Specifications General Table 13 General specifications Parameter Specification Device type USB 2 0 full speed Device compatibility USB 1 1 USB 2 0 DEFAULTS for AlnScan Low channel 0 programmable options and High channel 0 DEV RESET DEFAULT Samples 1000 message Rate 1000 Range 10 V Pacer Disabled Slave Transfer mode BlockIO Trigger Disabled Status Idle AlTrig Trigger polarity Rising CTR Value 0 Environmental Table 14 Environmental specifications Parameter Specification Operating temperature range 0 C to 70 C Storage temperature range 40 C to 70 C Humidity 0 to 90 non condensing Mechanical Table 15 Mechanical specifications Para
8. is range dependent as explained in the Specifications chapter on page 19 We use a 10 V range as an example of what you can expect when performing a measurement in this range The accuracy plots in Figure 6 are drawn for clarity and are not drawn to scale Input Voltage Output Code p 32768 65535 10V Figure 6 Ideal ADC transfer function The USB 7202 offset error is measured at mid scale Ideally a zero volt input should produce an output code of 32 768 Any deviation from this is an offset error Figure 7 shows the USB 7202 transfer function with an offset error The typical offset error specification for the USB 7202 on the 10 V range is 1 66 mV Offset error affects all codes equally by shifting the entire transfer function up or down along the input voltage axis USB 7202 User s Guide Functional Details The accuracy plots in Figure 7 are drawn for clarity and are not drawn to scale Input Voltage ideal Offset 1 66 mV Output Code 32708 1 66 mV 65535 10V Figure 7 ADC transfer function with offset error Gain error is a change in the slope of the transfer function from the ideal and is typically expressed as a percentage of full scale Figure 8 shows the USB 7202 transfer function with gain error Gain error is easily converted to voltage by multiplying the full scale input 10 V by the error The accuracy plots in Figure 8 are drawn for clarity and are not drawn to sca
9. software supported by the USB 7202 Install the software before you install your device The driver needed to run the USB 7202 is installed with the software Therefore you need to install the software package you plan to use before you install the hardware Installing the hardware There are two ways to connect the USB 7202 to your system Connect a USB cable from the USB connector to either a USB port on the computer or to an external USB hub connected to the computer No external power is required or Use a 2 54 mm 0 1 in box header to connect with the OEM connector The connector pinout is shown here Pin Signal Name Pin Signal Name 1 N C 2 VBUS 3 N C 4 D 5 N C do not connect anything to this pin 6 D 7 N C do not connect anything to this pin 8 GND 9 N C do not connect anything to this pin 10 SHIELD When you connect the USB 7202 for the first time a Found New Hardware message opens as the device is detected The installation is complete when the message closes After the USB 7202 is installed the Power LED remains on to indicate that communication is established between the USB 7202 and your computer Caution Do not disconnect any device from the USB bus while the computer is communicating with the USB 7202 or you may lose data and or your ability to communicate with the USB 7202 If the Power LED turns off If the Power LED is on but then turns off the computer
10. user maximum in this case would be in the 250 mA to 300 mA range Since some laptop computers running on battery power only allow up to 100 mA the USB 7202 may be above that allowed by the computer In this case you must either purchase a self powered hub or operate the laptop computer from an external power adapter Ground The analog ground AGND terminals provide a common ground for all analog channels The digital ground GND terminals provide a common ground for the digital trigger counter and sync channels and the power terminal USB 7202 User s Guide Functional Details Accuracy The overall accuracy of any instrument is limited by the error components within the system Quite often resolution is incorrectly used to quantify the performance of a measurement product While 16 bits or 1 part in 65 536 does indicate what can be resolved it provides little insight into the quality or accuracy of an absolute measurement Accuracy specifications describe the actual measurement that can be relied upon with a USB 7202 There are three types of errors which affect the accuracy of a measurement system offset gain nonlinearity The primary error sources in the USB 7202 are offset and gain Nonlinearity is small in the USB 7202 and is not significant as an error source with respect to offset and gain Figure 6 shows an ideal error free USB 7202 transfer function The typical calibrated accuracy of the USB 7202
11. 1 versions of the protocol low speed and full speed The USB 7202 is powered by the 5 volt USB supply from your computer no external power is required The device is compatible with both USB 1 1 and USB 2 0 ports A USB cable is shipped with the device Caution There are no product safety electromagnetic compatibility EMC or CE marking compliance claims made for the USB 7202 The USB 7202 is intended for use as a component of a larger system MCC can help developers meet their compliance requirements The end product supplier however is responsible for conforming to any and all compliance requirements USB 7202 User s Guide Introducing the USB 7202 Functional block diagram USB 7202 functions are illustrated in the block diagram shown here Figure 1 Functional block diagram Chapter 2 Installing the USB 7202 Unpacking As with any electronic device you should take care while handling to avoid damage from static electricity Before removing the device from its packaging ground yourself using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge Contact us immediately if any components are missing or damaged Installing the software Refer to the MCC DAQ Quick Start for instructions on installing the software on the MCC DAQ CD Refer to the device product page on the Measurement Computing website for information about the included and optional
12. BURSTIO scan to 32 k sample FIFO 20 S s to 50 kS s software selectable Throughput Software paced 500 S s all channels system dependent Scan to system memory Note 1 100 kS s of channels maximum of 50 kS s for any channel BURSTIO scan to 32 k Sample FIFO 200 kS s of channels maximum of 50 kS s for any channel Resolution 16 bits No missing codes 15 bits Crosstalk Signal DC 25 kHz 80 dB Trigger source Software selectable External digital TRIG_IN Calibration Cal factors stored in firmware Cal factors must be applied to data via application software Note 1 Maximum throughput scanning to system memory is machine dependent Table 2 Calibrated absolute accuracy Range Accuracy mV 10 V 5 66 5 V 2 98 2 V 1 31 1 V 0 68 Table 3 Accuracy components All values are Range of Reading Gain error at FS mV Offset mV 10 V 0 04 4 00 1 66 5 V 0 04 2 00 0 98 2 V 0 04 0 80 0 51 1 V 0 04 0 40 0 28 19 USB 7202 User s Guide Specifications Table 4 summarizes the noise performance for the USB 7202 Noise distribution is determined by gathering 50 K samples with inputs tied to ground at the user connector Samples are gathered at the maximum specified sampling rate of 50 kS s Table 4 Noise performance Range Typical counts LSBrms 10 V 10 1 52 5 V 10 1 52 2 V 11 1
13. USB 7202 Analog and Digital I O User s Guide Document Revision 10 Va QU Fa MEASUREMENT December 2014 r Copyright 2014 4 N Vap COMPUTING Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction Thank you for choosing a Measurement Computing product and congratulations You own the finest and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support It s the embodiment of our mission To provide data acquisition hardware and software that will save time and save money Simple installations minimize the time between setting up your system and actually making measurements We offer quick and simple access to outstanding live FREE technical support to help integrate MCC products into a DAQ system Limited Lifetime Warranty Most MCC products are covered by a limited lifetime warranty against defects in materials or workmanship for the life of the product to the original purchaser unless otherwise noted Any products found to be defective in material or workmanship will be repaired replaced with same or similar device or refunded at MCC s discretion For specific information please refer to the terms and conditions of sale Harsh Environment Program Any Measurement Computing product that is damaged due to misuse or any reason may be eligible for replacement with the same or similar device for 50 of the current list pri
14. USB 7202 and possibly the computer The maximum total output current that can be drawn from all USB 7202 connections power analog and digital outputs is 500 mA This maximum applies to most personal computers and self powered USB hubs Bus powered hubs and notebook computers may limit the maximum available output current to 100 mA The USB 7202 alone draws 150 mA of current from the USB 5 V supply Once you start running applications with the USB 7202 each DIO bit can draw up to 2 5 mA The maximum amount of 5 V current available for experimental use over and above that required by the USB 7202 is the difference between the total current requirement of the USB 7202 based on the application and the allowed current draw of the computer platform 500 mA for desktop computers and self powered hubs It shall not exceed 375 mA based on the Slo Blo Fuse current rating connected to the 5V terminal With all outputs at their maximum output current you can calculate the total current requirement of the USB 7202 USB 5 V as follows USB 7202 150 mA 8 DIO 2 5 mA ea 170 mA For an application running on a computer or powered hub the maximum available excess current is 500 mA 170 mA 330 mA This number is the total maximum available current at the 5VUSER screw terminal Measurement Computing highly recommends that you figure in a safety factor of 20 below this maximum current loading for your applications A conservative safe
15. ce I O boards face some harsh environments some harsher than the boards are designed to withstand Contact MCC to determine your product s eligibility for this program 30 Day Money Back Guarantee Any Measurement Computing Corporation product may be returned within 30 days of purchase for a full refund of the price paid for the product being returned If you are not satisfied or chose the wrong product by mistake you do not have to keep it These warranties are in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular application The remedies provided herein are the buyer s sole and exclusive remedies Neither Measurement Computing Corporation nor its employees shall be liable for any direct or indirect special incidental or consequential damage arising from the use of its products even if Measurement Computing Corporation has been notified in advance of the possibility of such damages Trademark and Copyright Information Measurement Computing Corporation InstaCal Universal Library and the Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation Refer to the Copyrights amp Trademarks section on mccdaq con legal for more information about Measurement Computing trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies 2014 Measurement Compu
16. channel 4 DIO4 G 9 CH4 IN Al channel 4 Ground GND O 8 AGND Analog ground DIO channel 3 DIO3 G G7 CH3IN Al channel 3 Ground GND O 6 AGND Analog ground DIO channel 2 DIO2 Q5 CH2IN Al channel 2 Ground GND 4 AGND Analog ground DIO channel 1 DIO1 G 3 CH1IN Al channel 1 Ground GND O 2 AGND Analog ground DIO channel 0 DIOO G 1 CHOIN Al channel 0 OEM USB LEDs connector connector Figure 4 Screw terminal pinout Use 16 AWG to 30 AWG when making screw terminal connections Signal connections Analog input You can connect up to eight analog input connections to screw terminals CHO IN through CH7 IN Connect unused analog input terminals to ground terminals during operation All AI channels are configured for single ended input mode The input voltage ranges are 10 V 5 V 2 0 V 1 0 V Each analog signal is referenced to signal ground AGND and requires two wires The wire carrying the signal to be measured connects to CHF IN The second wire connects to AGND Digital 1 0 You can connect up to eight digital I O lines to screw terminals DIOO to DIO7 Each digital bit is configurable as either input or output When configured for input the digital I O terminals can be used to detect the state of any TTL level input Pull up down configuration The digital pins are configurable via jumper JP1 for pull up to USB 5 V HD or pull down to ground LO On power up and reset the DIO pins are dri
17. ctable direction Output Outputs internal A D pacer clock Input Receives A D pacer clock from external source Input clock rate 50 kHz max Clock pulse width Input lus min Output 5us min Input leakage current 1 OuA Input high voltage 4 0 V min 5 5 V absolute max Input low voltage 1 0 V max 0 5 V absolute min Output high voltage Note 3 IOH 2 2 5 mA 3 3 V min No load 3 8 V min Output low voltage Note 3 IOL 2 2 5 mA 1 1 V max No load 0 6 V max Note 3 SYNC is a Schmitt trigger input and is over current protected with a 1 5 kQ series resistor Counter Table 8 Counter specifications Parameter Specification Pin name Note 4 CTR Counter type Event counter Number of channels 1 Input type TTL rising edge triggered Input source CTR screw terminal Resolution 32 bits Schmidt trigger hysteresis 20 mV to 100 mV Input leakage current luA Input frequency 1 MHz max High pulse width 500 ns min Low pulse width 500 ns min Input high voltage 4 0 V min 5 5 V absolute max Input low voltage 1 0 V max 0 5 V absolute min Note 4 CTR is a Schmitt trigger input protected with a 1 5 kQ series resistor Memory Table 9 Memory specifications Parameter Specification Data FIFO 32 768 samples 65 536 bytes EEPROM 1 024 bytes EEPROM configuration Address range Access Description 0x000 0x1FF Reserved 512 bytes system and Cal data 0x200 0x3FF Read write 512 bytes user a
18. e teet cb ood ee aceti P rere lute aee pe b avi eR ete ort 8 Installing the software oH o didas 8 Installing the hardware 2 tete ee peri enne bee epee tese pete 8 Calibrating the hardware P 9 Factory calibration A rob one NP EH CAT ET lee men date nest RSR ed 9 Field c libration e te RENE RENI a stas e se e REN RE RUE 9 Chapter 3 Functional Details iain A te dye 10 Analog input acquisition Modest ges eo cete e i eee UR RU ER US eire madness ets 10 Software paced spendere cbe et 10 Hardware pacte EEA nee Lt AM EE LE ELE A nr Let LE ees EEUU LLL 10 BURST O s a Rina oidos 10 Board COMPONeNts EC USB connectot 2 sis re Fee A A ar eH C TIENS OEM connetto aiseee ee iira Trigger Sync connector LED indicators a snie reete tre nn EIs Screw terminals Signal connections ain e pido Analog mput s t cars ar RO E A A A EDAD I ER CHE ds Digital I O SYNC I O RS eee ere tiet ee ei bee eee eee eet sede EE eerte be delete acetum Counter PUT ESS rene O edic ttr mci en eerte QU dise cet id Power output nn EE Peu Synchronized operations ien io atte pete tbe Ene pe a Dim eto im tte p tien Shey 17 Mechanical dra WIDE ic ees scotia E de oe betae toe ee AE SE RE ni 18 Chapter 4 Specifications uae ia ass Seah eee aaa LSU iis 19 Prius
19. kS s divided by the number of channels The maximum rate for each channel is 50 kS s The maximum rate that you can acquire data using BURSTIO is 50 kS s per channel for one two or four channels and 25 kS s per channel for eight channels USB 7202 User s Guide Functional Details Board components The USB 7202 components are shown in Figure 2 1 Trigger Sync connector 2 Pins 1 20 Trigger jumper P6 3 Power LED top and Status LED bottom 4 USBconnector Pins 1 20 7 5 Pull up down jumper JP1 6 OEM connector Figure 2 Board components USB connector Pins 21 40 8 Trigger jumper P7 9 Sync jumper P6 The USB connector provides 5 V power and communication The voltage supplied through the USB connector is system dependent and may be less than 5 V No external power supply is required This connector operates in parallel with the OEM connector do not connect to both the USB connector and the OEM connector OEM connector The OEM connector operates in parallel with the USB connector do not connect to both the USB connector and the OEM connector The OEM connector is a 0 1 box header Pins 2 4 6 8 and 10 provide a USB connection as listed in the connector pinout below OEM connector pinout Pin Signal Name Pin Signal Name 1 N C 2 VBUS 3 N C 4 D 5 N C do not connect anything to this pin 6 D 7 N C do not connect anything to this pin 8 GND 9
20. le Input Voltage Gain error 0 04 or 4 mV Gain error 0 04 or 4 mV y a 10V ideal ky Output Code Figure 8 ADC Transfer function with gain error For example the USB 7202 exhibits a typical calibrated gain error of 0 04 on all ranges For the 10 V range this would yield 10 V x 40 0002 4 mV This means that at full scale neglecting the effect of offset for the moment the measurement would be within 4 mV of the actual value Note that gain error is expressed as a ratio Values near FS 10 V are more affected from an absolute voltage standpoint than are values near mid scale which see little or no voltage error Combining these two error sources in Figure 9 we have a plot of the error band of the USB 7202 at full scale 10 V This plot is a graphical version of the typical accuracy specification of the product USB 7202 User s Guide Functional Details The accuracy plots in Figure 9 are drawn for clarity and are not drawn to scale Input Voltage Ideal 1 66 mV 4 mV Ideal Ideal 41 66 mV 4 mV Output Code 65535 Ideal 1 66 mV 4 mV gt 10V ideal Ideal 1 66 mV 4 mV Figure 9 Error band plot Synchronized operations You can connect the SYNC pin of two USB 7202 devices together in a master slave configuration and acquire data from the analog inputs of both devices using one clock When the SYNC pin is configured as an output the internal A D pacer c
21. lock signal is sent to the screw terminal If jumper P6 is installed you can output the clock to the SYNC pin of a second USB 7202 configured for A D pacer input The SYNC pin is available on both the screw terminal connector and on the Trigger SYNC connector when jumper P6 is installed Refer to page 14 for more information about the SYNC pin USB 7202 User s Guide Functional Details Mechanical drawing 5 08 90 81 m 8 B N e 3550 90 17 3 350 85 09 2 987 75 86 3200 8128 2 300 58 42 1775 45 09 1 537 39 04 985 25 02 564 1431 300 762 200 508 00 0 0 200 5 08 000 3575 90 81 3 775 95 89 Figure 10 Circuit board dimensions Chapter 4 Specifications All specifications are subject to change without notice Typical for 25 C unless otherwise specified Specifications in italic text are guaranteed by design Analog input Table 1 Analog input specifications Parameter Conditions Specification A D converter type 16 bit successive approximation type Number of channels 8 single ended Input configuration Individual A D per channel Sampling method Simultaneous Absolute maximum input voltage CHx IN to GND 15 V max Input impedance 100 MQ min Input ranges Software selectable 10 V 45 V 2 V 1 V Sampling rate Scan to system memory 0 6 S s to 50 kS s software selectable
22. meter Specification Dimensions L x W x H 90 17 x 95 25 x 12 70 mm 3 55 x 3 75 x 0 5 in 111 76 mm 4 40 in length with detachable screw terminals connected USB cable length 3 m 9 84 ft max User connection length 3 m 9 84 ft max Screw terminal connector and pinout Table 16 Connector specifications Parameter Specification Connector type Detachable screw terminal Wire gauge range 16 AWG to 30 AWG 23 USB 7202 User s Guide Specifications Table 17 Connector pinout NY OS O G G O 9 9 connec Spare fuse for F1 OEM USB connector connec tor Pin Signal Name Pin Signal Name 1 CHO IN 21 DIOO 2 AGND 22 GND 3 CH1 IN 23 DIO1 4 AGND 24 GND 5 CH2 IN 25 DIO2 6 AGND 26 GND 7 CH3 IN 27 DIO3 8 AGND 28 GND 9 CH4 IN 29 DIO4 10 AGND 30 GND 11 CH5 IN 31 DIO5 12 AGND 32 GND 13 CH6 IN 33 DIO6 14 AGND 34 GND 15 CH7 IN 35 DIO7 16 AGND 36 SYNC 17 N C no connect 37 TRIG_IN 18 AGND 38 CTR 19 AGND 39 5VUSER 20 AGND 40 GND Trigger Sync HO Spare fuse tor for F2 DODODDDDDOOODOOODODODO AN OC 4 NONGO AGND AGND AGND N C AGND CH7 IN AGND CH6 IN AGND CH5 IN AGND CH4 IN AGND CH3 IN AGND CH2 IN AGND CH1 IN AGND CHO IN 24 USB 7202 User s Guide Specifications
23. mode should resolve these problems Hardware paced You can acquire data from up to eight channels simultaneously in hardware paced mode The analog data is continuously acquired and converted to digital values until you stop the scan Data is transferred in blocks of up to 32 samples from the USB 7202 to the memory buffer on your computer The maximum sampling rate is an aggregate rate where the total sample rate for all channels is 100 kS s divided by the number of channels with a maximum rate of 50 kS s for any channel Using this equation you can acquire data with the USB 7202 from one channel at 50 kS s two channels at 50 kS s each four channels at 25 kS s each and so on up to eight channels at 12 5 kS s each You can start a hardware paced scan with either a software command or with an external hardware trigger event BURSTIO When using BURSTIO the USB 7202 can acquire data using the full capacity of its 32 kilosample FIFO The acquired data is then read from the FIFO and transferred to a user memory buffer on the computer You can initiate a single acquisition sequence for any number of input channels with either a software command or with an external hardware trigger When BURSTIO is enabled scans are limited to the depth of the onboard memory as the data is acquired at a rate faster than it can be transferred to the computer The maximum sampling rate is an aggregate rate where the total acquisition rate for all channels is 200
24. or the names of manuals and help topic titles and to emphasize a word or phrase Where to find more information Additional information about USB 7202 hardware is available on our website at www mccdaq com You can also contact Measurement Computing Corporation with specific questions Knowledgebase kb mccdaq com Tech support form www mccdaq com support support_form aspx Email techsupport mccdaq com Phone 508 946 5100 and follow the instructions for reaching Tech Support For international customers contact your local distributor Refer to the International Distributors section on our website at www mccdaq com International Chapter 1 Introducing the USB 7202 The USB 7202 is a USB 2 0 full speed device that provides the following features Eight channels of 16 bit analog input o 100 kS s max total throughput 200 kS s with BURSTIO enabled 50 kS s on any one channel o Simultaneous sampling 1 A D converter per input o Independently configurable input ranges Eight individually configurable digital I O channels 32 bit event counter Digital trigger input Bidirectional SYNC pin for external clocking and synchronization with another board USB 104 form factor Stackable 3 55 x 3 75 board dimensions The USB 7202 device is compatible with both USB 1 1 and USB 2 0 ports The speed of the device may be limited when using a USB 1 1 port due to the difference in transfer rates on the USB 1
25. rea 21 USB 7202 User s Guide Specifications Microcontroller Table 10 Microcontroller specifications Parameter Specification Type High performance 8 bit RISC microcontroller Program memory 32 768 words Data memory 3 936 bytes Indicator LEDs Table 11 Indicator LED specifications Parameter Specification Power LED top Indicates that the device s microcontroller has power and is configured Status LED Blinks to indicate USB communications OEM power OEM Connector LED sink current up to 5 mA per LED 5 Vmax Power Table 12 Power specifications Parameter Conditions Specification Supply current USB enumeration lt 100 mA Continuous mode 150 mA Note 5 5VUSER power available Note 6 Connected to self powered hub Connected to externally powered root port hub 4 0 V min 5 25 V max Output current Note 7 350 mA max Fuse F1 F4 spare 0452 500 Littelfuse 0 5A NANO2 Slo Blo Subminiature Surface Mount Fuse Fuse F2 F3 spare 0452 375 Littelfuse 0 375A NANO2 Slo Blo Subminiature Surface Mount Fuse Note 5 This is the total current requirement for the USB 7202 which includes up to 10 mA for the status LED Note 6 Self powered hub refers to a USB hub with an external power supply Self powered hubs allow a connected USB device to draw up to 500 mA Root port hubs reside
26. ting Corporation All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use in life support systems and or devices without prior written consent from Measurement Computing Corporation Life support devices systems are devices or systems that a are intended for surgical implantation into the body or b support or sustain life and whose failure to perform can be reasonably expected to result in injury Measurement Computing Corporation products are not designed with the components required and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people HM USB 7202 Table of Contents Preface About this User s Guide mec M 5 S IDEM E 5 Where to find more mformation 2 etr ad dei 5 Chapter 1 Introducing the USB 7202 5 enint eterne teer uit ro eine een rans Ee ae a cree ca sese maneras 6 Functional block diagram eei ia sn Dee N on uita 7 Chapter 2 Installing the USB 7202 aeaaea aa paaa ccrte rd nde aii e edente sd radio cese ce eaa cea ores een tte 8 Unpacking secs ide
27. ven high JP1 Figure 5 Jumper JP1 configuration 13 USB 7202 User s Guide Functional Details For more information on signal connections For general information regarding digital signal connections and digital I O techniques refer to the Guide to DAQ Signal Connections available on our website at www mccdaq com signals signals pdf SYNC I O The SYNC connection is a bidirectional I O signal that can be configured as an input default or an output Configure as an external clock input to pace the A D conversions from an external source The SYNC terminal supports TTL level input signals of up to 50 kHz Configure as an output to pace conversions on a second USB 7202 The SYNC pin on the screw terminal is internally connected to the SYNC pin on the Trigger Sync connector see page 12 Trigger input Use the digital trigger input TRIG_IN to start an acquisition when a rising or falling edge is detected on the signal This pin is internally connected to the TRIG_IN pin on the Trigger Sync connector see page 12 Counter input The CTR connection is a TTL level input to a 32 bit event counter The internal counter increments when the TTL level transitions from low to high The counter can count frequencies of up to 1 MHz Power output The 5VUSER connection is a 5 volt output that is supplied by the host computer Caution Do not connect to an external power supply to this terminal or you may damage the
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