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NI R Series Multifunction RIO User Manual

1. HM i Calibration ZN Input Mux DAC i Configuration Flash Al Control Memory 1 1 Esc Instrumentation 16 Bit 5 AI Amplifier CT 5 i ach o 1 5 E Dee 8 5 Input Mode Mux O AISENSE 2 AIGND gt N Voltage Temperature User B 9 5 Reference ensor Configurable 5zc Addess us Tee HE ME Dee FPGA on RIO Control Interface 5 ge 2 Calibration Devices S A 16 DACs x ADAC Le i x8 Channels _ 1 KEES amp lt Digital WO 16 PAS a 8 lt Digital UO 40 2 2 PXI Local Bus NI PXI 783xR only 5 RTSI Bus lt amp DN 62 K Digital 1 0 40 Figure 2 3 NI 7831R 7833R 784xR 785xR Block Diagram NI 7811R Overview The NI 7811R has 160 bidirectional DIO lines and a Virtex II XC2V 1000 FPGA NI 7813R Overview The NI 7813R has 160 bidirectional DIO lines and a Virtex II XC2V 3000 FPGA NI 7830R Overview The NI 7830R has four independent 16 bit AI channels four independent 16 bit AO channels 56 bidirectional DIO lines that you can configure individually for input or output and a Virtex II XC2V1000 FPGA National Instruments Corporation 2 3 R Series Multifunction RIO User Manual Hardware Overview of the NI 78xxR NI 7831R 7833R Overview The NI 7831R 7833R each have eight independent 16 bit AI chann
2. 9 9 Tol 81 5 A om 52 S5 S4 S3 Figure B 1 General Purpose Switch Configuration for the SCB 68 Terminal Block After configuring the SCB 68 switches you can connect the I O signals to the SCB 68 screw terminals Refer to Appendix A Connecting I O Signals for the connector pin assignments for the NI 78xxR After connecting I O signals to the SCB 68 screw terminals you can connect the SCB 68 to the with the SHC68 68 RMIO for Connector 0 on the NI 783xR 784xR 785xR or SHC68 68 RDIO Connector lt 0 3 gt on the NI 781xR and Connector lt 1 2 gt on the NI 783xR 784xR 785xR shielded cables National Instruments Corporation B 1 R Series Multifunction RIO User Manual Technical Support and Professional Services Visit the following sections of the award winning National Instruments Web site at ni com for technical support and professional services National Instruments Corporation Support Technical support at ni com support includes the following resources Self Help Technical Resources For answers and solutions visit ni com support for software drivers and updates a searchable KnowledgeBase product manuals step by step troubleshooting wizards thousands of example programs tutorials application notes instrument drivers and so on Registered users also receive access to the NI Discussion Forums at ni com forums NI Applications Engineers make sure every question submitte
3. 53 52 51 50 49 a 48 CH 47 46 E 45 A Em 44 o 43 e 42 41 40 39 38 37 36 35 Aa DIO38 DIO36 DIO34 DIO32 DIO30 DIO28 5V 5V DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND NO owes CONN TERMINAL 68 TERMINAL 34 TERMINAL 1 TERMINAL 35 JN gt lt IN TERMINAL 68 Dm TERMINAL 35 TERMINAL 34 TERMINAL TERMINAL 1 TERMINAL 34 TERMINAL 35 HI TERMINAL 68 e 5 oc 58 BG 50 T z o 0 68 34 AIO AIGNDO 67 33 AIGND1 Alz 66 32 Al2 65 31 AI2 AIGND2 64 30 AIGND3 63 29 Al3 Al4 1 62 28 Al4 1 AIGND4 61 27 AIGND5 Al5 1 60 26 Al5 1 16 1 59 25 Ale AIGND6 58 24 AIGND7 Al7 1 57 23 AI7 AISENSE 56 22 No Connect AOO 55 21 AOGNDO AO1 54 20 AOGND1 2 53 19 AOGND2 AO3 52 18 AOGND3 AO4 51 17
4. ccsccccccsssssecceeeesssceccesessseeececesseeceeeesseeeeeeeetaeeeeeessas xi Chapter 1 Introduction About the Reconfigurable I O Device seen ener 1 1 Using PXI with etin totes ane Pier ete te duae 1 2 Overview of Reconfigurable UO 1 3 Reconfigurable I O Concept 1 3 Flexible Functionality 5 5 trt m tenete epe 1 4 User Defined I O Resource 1 4 Device Embedded Logic and Processing esses 1 4 Reconfigurable I O Architecture eese 1 5 Reconfigurable I O Appltceatons 1 6 Software Development eed etes te tette Fiet 1 6 LabVIEW FPGA Module en tette tte heiter 1 6 LabVIEW Real Time Module 1 7 Cables and Accessories eto ne pe o RO e rep a 1 8 Custom Cabling inc tate etie tp el P d ieu E ai 1 9 Chapter 2 Hardware Overview of the NI 78xxR NI 781TR OVerVIeW eee reete ettet e ente eese ee ese ee keiten hd Eee a 2 3 NIR OVerVieW uiri EN PREPARED ARMED UE RE ee Ere Ue vue ve 2 3 NI 7830R OVERVIEW tette e E E E RYE IU TIERE TOER EXE E 2 3 NI 7831R 7833R OVerVIeW doge tno e rein tarde ERR Este bote 2 4 NI 784x R OVetVIe Wes isa aec ta ave EE E 2 4 NI 785XxROVGrVIGWzi i Re uten e RD EENS SERVE EUR es 2 4 Analog Input NI 783xR 784xR 785xR Only 2 4 Input Modes 4 nera ena dotted eta ai vei c e t eti e de eo 2 5 Input R nge ieir an a pa a n a er eden 2 5 Co
5. t Measured m Voltage KS olL lAISENEE i S AIGND UO Connector VY DIFF Input Mode Selected National Instruments Corporation 2 11 Figure 2 6 Differential Input Connections for Ground Referenced Signals With this connection type the instrumentation amplifier rejects both the common mode noise in the signal and the ground potential difference between the signal source and the NI 783xR 784xR 785xR ground shown as V in Figure 2 6 In addition the instrumentation amplifier can reject common mode noise pickup in the leads connecting the signal sources to the device The instrumentation amplifier can reject common mode signals when V and input signals are both within their specified input ranges Refer to NI R Series Multifunction RIO Specifications available at ni com manuals for more information about input ranges R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR Differential Connections for Nonreferenced or Floating Signal Sources Figure 2 7 shows how to connect a floating signal source to a channel on the NI 783xR 784xR 785xR configured in DIFF input mode Resistors Floati ng see text Signal Vs Source Za Paths Alt Dias ol uum Oo Instrumentation Amplifier i Measured A oo Voltage Bias C
6. Data acquisition A system that uses the computer to collect receive and generate electrical signals Decibel The unit for expressing a logarithmic measure of the ratio of two signal levels dB 20log10 V1 V2 for signals in volts Direct current Digital ground signal Differential mode Digital input output Digital input output channel signal Direct memory access A method by which data can be transferred to from computer memory from to a device or memory on the bus while the processor does something else DMA is the fastest method of transferring data to from computer memory Differential nonlinearity A measure in LSB of the worst case deviation of code widths from their ideal value of 1 LSB Digital output R Series Multifunction RIO User Manual Glossary E EEPROM F FPGA FPGA VI glitch INL L LabVIEW LSB Electrically erasable programmable read only memory ROM that can be erased with an electrical signal and reprogrammed Field Programmable Gate Array A configuration that is downloaded to the FPGA and that determines the functionality of the hardware An unwanted signal excursion of short duration that is usually unavoidable Hour Hardware in the loop Hertz Input output The transfer of data to from a computer system involving communications channels operator interface devices and or data acquisition and control interfaces Relative accuracy Lab
7. A En 44 43 42 41 40 39 38 37 36 35 A a DIO38 DIO36 DIO34 DIO32 DIO30 DIO28 5V 5V DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND e a Ee Ee Q Be 2c gt tu 8 8 TERMINAL 68 ml Dm TERMINAL 35 TERMINAL 34 TERMINAL 1 TERMINAL 1 j TERMINAL 34 TERMINAL 35 B r TERMINAL 68 TERMINAL 68 Dm TERMINAL 35 TERMINAL 34 TERMINAL 1 TERMINAL 1 TERMINAL 34 TERMINAL 35 TERMINAL 68 um ER R CONNECTOR 2 RDIO CONN R Series Multifunction RIO User Manual Figure A 1 NI 781xR Connector Pin Assignments and Locations ni com Appendix H 037 1035 033 1031 029 1027 026 1025 024 1023 022 1021 020 O19 O18 O17 O16 O15 O14 O13 O12 O11 O10 Og COB CI Wei C EI Cm C Mt C RESI Mil Om C NE C g o x OM Om CIE UOCE ofr 68 lt D 67 wo wo 66 Ca 65 lt a 64 wo o 63 e 62 61 60 59 a 58 AR 57 Ka 56 55 k 54
8. Note SW2 SW3 are not connected National Instruments Corporation 2 23 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR SW1 SW2 SW3 Figure 2 13 Switch Location on the NI PCI 781xR SW1 SW2 SW3 67 970 o y EE we Tora 2 R Series Multifunction RIO User Manual Figure 2 14 Switch Location on the NI PXI 781xR 2 24 ni com Hardware Overview of the NI 78xxR Chapter 2 ER iets d Dech ch orci E a G SW1 SW2 SW3 Figure 2 15 Switch Location on the NI PCI 783xR SW1 SW2 SW3 16 Switch Location on the NI PXI 783xR Figure 2 R Series Multifunction RIO User Manual 2 25 National Instruments Corporation Chapter 2 5 Hardware Overview of the NI 78xxR 123 a Normal Operation Default b Prevent VI From Loading Figure 2 17 Switch Settings Complete the following steps to prevent a VI stored in Flash memory from loading to the FPG
9. You can configure the behavior of the reconfigurable FPGA to match the requirements of the measurement and control system You can implement this user defined behavior as an FPGA VI to create an application specific I O device National Instruments Corporation 1 3 R Series Multifunction RIO User Manual Chapter 1 Introduction Flexible Functionality Flexible functionality allows the NI 78xxR to match individual application requirements and to mimic the functionality of fixed I O devices For example you can configure an R Series device in one application for three 32 bit quadrature encoders and then reconfigure the R Series device in another application for eight 16 bit event counters You also can use the R Series device with the LabVIEW Real Time Module in timing and triggering applications such as control and hardware in the loop HIL simulations For example you can configure the R Series device for a single timed loop in one application and then reconfigure the device in another application for four independent timed loops with separate I O resources User Defined 1 0 Resources You can create your own custom measurements using the fixed I O resources For example one application might require an event counter that increments when a rising edge appears on any of three digital input lines With an NI 783xR 784xR 785xR R Series device another application might require a digital line to be asserted after an analog input exceeds
10. the RTSI bus is implemented through a ribbon cable connected to the RTSI connector on each device that needs to access the RTSI bus You can use the RTSI trigger lines to synchronize the NI 78xxR to any other device that supports triggers On the NI PCI 781xR 783xR and NI PCIe 784xR 785xR the RTSI trigger lines are labeled RTSI RTSI lt 0 6 gt and RTSI RTSI7 On the NI PXI 78xxR the RTSI trigger lines are labeled PXI PXI_Trig lt 0 7 gt In addition the NI PXI 78xxR can use the PXI star trigger line to send or receive triggers from a device plugged into Slot 2 of the PXI chassis The PXI star trigger line on the NI PXI 78xxR is PXI PXI Star The NI 78xxR can configure each RTSI trigger line either as an input or an output signal Because each trigger line on the RTSI bus is connected in parallel to all the other RTSI devices on the bus only one device should drive a particular RTSI trigger line at a time For example if one NI PXI 78xxR is configured to send out a trigger pulse on TrigO the remaining devices on that PXI bus segment must have PXI PXI TrigO configured as an input N Caution Do not drive the same trigger bus line with the NI 78xxR and another device simultaneously Such signal driving can damage both devices NI is not liable for any damage resulting from such signal driving For more information on using and configuring triggers select Help Search the LabVIEW Help in LabVIEW to view
11. 23 24 No Connect AOO 1 2 No Connect 0 1 2 AlO 01011 25 26 No Connect AOGNDO 3 4 No Connect AIGNDO 4 1 DIO10 27 28 No Connect 1 5 6 AOGND1 11 5 6 AIGND1 DIO9 29 30 No Connect 2 7 8 No Connect Al2 7 8 Al2 0108 31 32 No Connect AOGND2 9 10 No Connect AIGND2 9 10 1 DIO7 33 34 No Connect 11 12 AOGND3 3 11 12 AIGND3 DIO6 35 36 AOA 13 14 No Connect Al4 13 14 Al4 DIO5 37 38 DGND AOGND4 15 16 No Connect AIGND4 15 16 15 DIO4 39 40 DGND 17 18 AOGND5 5 17 18 AIGND5 DIO3 41 42 DGND AO6 19 20 No Connect 6 19 20 Al6 DIO2 43 44 DGND AOGND6 21 22 No Connect AIGND6 21 22 AI7 DIO1 45 46 DGND 23 24 AOGND7 7 23 24 AIGND7 DIOO 47 48 DGND No Connect 25 26 No Connect AISENSE 25 26 No Connect 5V 49 50 DGND AO 0 7 Connector Al 0 7 Connector DIO 0 15 Connector Pin Assignment Pin Assignment Pin Assignment Figure A 3 Connector Pinouts when Using NSC68 262650 Cable Connecting to SSR Digital Signal Conditioning NI provides cables that allow you to connect signals from the NI 78xxR directly to SSR backplanes for digital signal conditioning The NSC68 5050 cable connects the signals on the NI 78xxR RDIO connectors directly to SSR backplanes for digital signal condi
12. AO 96 DIO Virtex 5 LX50 750 kS s NI PXI 7853R 8 AI 8 AO 96 DIO Virtex 5 LX85 750 kS s NI PXI 7854R 8 AI 8 AO 96 DIO Virtex 5 LX110 750 kS s A user reconfigurable FPGA Field Programmable Gate Array controls the digital I O lines on the NI 781xR and the digital and analog I O lines on the NI 783xR 784xR 785xR The FPGA on the Series device allows you to define the functionality and timing of the device You can change the functionality of the FPGA on the R Series device in LabVIEW using the LabVIEW FPGA Module to create and download a custom virtual National Instruments Corporation 1 1 R Series Multifunction RIO User Manual Chapter 1 Introduction instrument VI to the FPGA Using the FPGA Module you can graphically design the timing and functionality of the R Series device If you only have LabVIEW but not the FPGA Module you cannot create new FPGA VIs but you can create VIs that run on Windows or a LabVIEW Real Time RT target to control existing FPGA VIs Some applications require tasks such as real time floating point processing or datalogging while performing I O and logic on the R Series device You can use the LabVIEW Real Time Module to perform these additional applications while communicating with and controlling the R Series device The R Series device contains Flash memory to store a startup VI for automatic loading of the FPGA when the system is powered on The NI 78xxR uses the Real Time System In
13. AOGND4 AO5 50 16 AOGNDS AO6 49 15 AOGND6 71 48 14 AOGND7 01015 47 13 01014 DIO13 46 12 01012 01011 45 11 01010 DIO9 44 10 DIO8 DIO7 43 9 DGND DIO6 42 8 DIO5 41 7 DIO4 40 6 DGND DIO3 39 5 DGND DIO2 38 4 DGND DIO1 37 3 DGND DIOO 36 2 DGND 5V 35 1 5V Lo 1No Connect on the NI 7830R National Instruments Corporation Figure 2 NI 783xR 784xR 785xR Connector Pin Assignments and Locations R Series Multifunction RIO User Manual Connecting 1 0 Signals Appendix Connecting 1 0 Signals To access the signals on the I O connectors you must connect a cable from the I O connector to a signal accessory Plug the small VHDCI connector end of the cable into the appropriate I O connector and connect the other end of the cable to the appropriate signal accessory Table 1 1 0 Connector Signal Descriptions Signal Name Reference Direction Description 5V DGND Output 5 VDC Source These pins supply 5 V from the computer power supply For more information on the 5V terminals refer to the 5 V Power Source section in Chapter 2 Hardware Overview of the NI 78xxR Analog Signals NI 783xR 784xR 785xR Only AI lt 0 7 gt AIGND Input Positive input for Analog Input channels 0 through 7 AI lt 0 7 gt AIGND Input Negative input for Analog Input channels 0 throu
14. FPGA IPNet Offers resources for browsing understanding and downloading LabVIEW FPGA functions or IP Intellectual Property Use this resource to acquire IP that you need for your application download examples to help learn programming techniques and explore the depth of IP offered by the LabVIEW FPGA platform To access the LabVIEW FPGA IPNet visit ni com ipnet National Instruments Corporation Xi R Series Multifunction RIO User Manual Introduction This chapter describes the NI 78 1xR 783xR 784xR 785xR the concept of the Reconfigurable I O RIO device optional software and equipment for using the NI 78xxR and safety information about the NI 78xxR About the Reconfigurable 1 0 Device Table 1 1 lists an overview of the NI 78xxR R Series Multifunction RIO devices Table 1 1 NI 78xxR R Series Multifunction RIO Device Overview Device I O Channels FPGA AI Sample Rate NI PCI PXI 7811R 160 DIO Virtex II XC2V 1000 NI PCI PXI 7813R 160 DIO Virtex II XC2V3000 NI PCI PXI 7830R 4 AL 4 AO 56 DIO Virtex II XC2V 1000 200 kS s NI PCI PXI 7831R 8 AI 8 AO 96 DIO Virtex II XC2V 1000 200 kS s NI PCI PXI 7833R 8 AI 8 AO 96 DIO Virtex II XC2V3000 200 kS s NI PCle PXI 7841R 8 AI 8 AO 96 DIO Virtex 5 LX30 200 kS s NIPCIe PXI 7842R 8 AI 8 AO 96 DIO Virtex 5 LX50 200 kS s NI PCle PXI 7851R_ 8 AI 8 AO 96 DIO Virtex 5 LX30 750 kS s NIPCIe PXI 7852R 8 AI 8
15. LVTTL CMOS or LVCMOS signals and sensing external device states such as the state of the switch shown in Figure 2 11 Digital output applications include sending TTL or LVCMOS signals and driving external devices such as the LED shown in Figure 2 11 The NI 78xxR SHC68 68 RDIO cable contains individually shielded bundles that route each digital signal on an individually shielded pair of wires and each signal is twisted with its own wire to digital ground National Instruments Corporation 2 19 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR The SHC68 68 RDIO was designed specifically for R Series devices and is the NI recommended cable for digital applications If you are using the SH68 C68 S cable however please note the following considerations The SH68 C68 S shielded cable contains 34 twisted pairs of conductors To maximize the digital I O available on the NI 78xxR some of the DIO lines are twisted with power or ground and some DIO lines are twisted with other DIO lines To obtain maximum signal integrity place edge sensitive or high frequency digital signals on the DIO lines that are paired with power or ground Because the DIO lines that are twisted with other DIO lines can couple noise onto each other use these lines for static signals or non edge sensitive low frequency digital signals Examples of high frequency or edge sensitive signals include clock trigger pulse width modulat
16. NI 783xR 784xR 785xR onboard calibration DACs CalDACs correct these errors Because the analog circuitry handles calibration the data read from the AI channels or written to the AO channels in the FPGA VI is already calibrated Three levels of calibration are available for the NI 783xR 784xR 785xR to ensure the accuracy of its analog circuitry The first level loading calibration constants is the fastest easiest and least accurate The intermediate level internal self calibration is the preferred method of assuring accuracy in your application The last level external calibration is the slowest most difficult and most accurate Loading Calibration Constants The NI 783xR 784xR 785xR is factory calibrated before shipment at approximately 25 C to the levels indicated in the device specifications Refer to the NI Series Multifunction RIO Specifications available at ni com manuals for more information calibration levels The onboard nonvolatile Flash memory stores the calibration constants for the device Calibration constants are the values that were written to the CalDACs to achieve calibration in the factory The NI 783xR 784xR 785xR hardware reads these constants from the Flash memory and loads them into the CalDACs at power on This occurs before you load a VI into the FPGA Self Calibration With self calibration the NI 783xR 784xR 785xR can internally measure and correct almost all of its calibration related errors withou
17. RDIO connector for a total of 56 DIO lines The NI 7831R 7833R 784xR 785xR has one RMIO and two RDIO connectors for a total of 96 DIO lines Refer to Figure A 1 NI 781xR Connector Pin Assignments and Locations for the connector locations and the I O connector pin assignments on the NI 781xR Refer to Figure 2 NI 783x R 784x R 785xR Connector Pin Assignments and Locations for the connector locations and the I O connector pin assignments on the NI 783xR 784xR 785xR The DIO lines on the NI 78xxR are TTL compatible When configured as inputs they can receive signals from 5 V TTL 3 3 V LVTTL 5 V CMOS and 3 3 V LVCMOS devices When configured as outputs they can send signals to 5 V TTL 3 3 V LVTTL and 3 3 V LVCMOS devices Because the digital outputs provide a nominal output swing of 0 to 3 3 V 3 3 V TTL the DIO lines cannot drive 5 V CMOS logic levels To interface to 5 V CMOS devices you must provide an external pull up resistor to 5 V This resistor pulls up the 3 3 V digital output from the NI 78xxR to 5 V CMOS logic levels Refer to the NI Series Multifunction RIO Specifications available at com manuals for detailed DIO specifications N Caution Exceeding the maximum input voltage ratings listed in Table 2 NI 78xxR I O Signal Summary can damage the NI 78xxR and the computer NI is not liable for any damage resulting from such signal connections UN Caution Do not short the DIO lines of the NI 78xxR directly
18. the LabVIEW Help Refer to the PXI Hardware Specification Revision 2 1 and PXI Software Specification Revision 2 1 at www pxisa org for more information about PXI triggers PXI Local Bus NI PXI 781xR 783xR Only The NI PXI 781xR 783xR can communicate with other PXI devices using the PXI local bus The PXI local bus is a daisy chained bus that connects each PXI peripheral slot with its adjacent peripheral slot on either side For example the right local bus lines from a PXI peripheral slot connect to the left local bus lines of the adjacent slot on the right Each local bus is 13 lines National Instruments Corporation 2 21 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR wide All of these lines connect to the FPGA on the NI PXI 781xR 783xR The PXI local bus right lines on the NI PXI 781xR 783xR are PXI PXI_Lbr lt 0 12 gt The PXI local bus left lines on the NI PXI 781xR 783xR are PXI PXI_Lbl lt 0 12 gt The NI PXI 781xR 783xR can configure each PXI local bus line either as an input or an output signal Only one device can drive the same physical local bus line at a time For example if the NI PXI 781xR 783xR is configured to drive a signal on PXI PXI Lbr 0 the device in the slot immediately to the right must have its PXI PXI Lbl 0 line configured as an input UN Caution Do not drive the same PXI local bus line with the NI PXI 78 1xR 783xR and another device simultaneously Such signal dr
19. to other R Series devices for most applications and with most accessories For most applications it is not necessary to install the disk drive power connector However you should install the disk drive power connector in either of the following situations You need more power than listed in the device specifications e You are using R Series accessory with no external power supply such as the cRIO 9151 Refer to the specifications document for your device for more information about PCI Express power requirements and power limits R Series Multifunction RIO User Manual 2 28 ni com Chapter 2 Hardware Overview of the NI 78xxR Disk Drive Power Connector Installation Before installing the disk drive power connector you must install and set up the R Series PCI Express device as described in the Getting Started with R Series Multifunction RIO document Complete the following steps to install the disk drive power connector 1 Power off and unplug the computer 2 Remove the computer cover 3 Attach the PC disk drive power connector to the disk drive power connector on the device as shown in Figure 2 19 Note The power available on the disk drive power connectors in a computer can vary For example consider using a disk drive power connector that is not in the same power chain as the hard drive 1 Device Disk Drive Power Connector 2 PC Disk Drive Power Connector Figure 2 19 Connecting to the Disk D
20. to power or to ground Doing so can damage the NI 78xxR by causing excessive current to flow through the DIO lines You can connect multiple NI 78xxR digital output lines in parallel to provide higher current sourcing or sinking capability If you connect multiple digital output lines in parallel your application must drive all of these lines simultaneously to the same value If you connect digital lines together and drive them to different values excessive current can flow through the DIO lines and damage the NI 78xxR Refer to the NI R Series Multifunction RIO Specifications available at ni com manuals for more information about DIO specifications Figure 2 11 shows signal connections for three typical DIO applications R Series Multifunction RIO User Manual 2 18 ni com Chapter 2 Hardware Overview of the NI 78xxR VVV LED v7 v TTL or DGND 5V LVCMOS Compatible Devices r DIO lt 4 7 gt 5 V CMOS a OT E gt TTL LVTTL CMOS or LVCMOS Signal ion DIO lt 0 3 gt Oo 5V P Switch Se DGND Connector NI 783xR 784xR 785xR 3 3 V CMOS TUse a pull up resistor when driving 5 V CMOS devices Figure 2 11 Example Digital 1 0 Connections Figure 2 11 shows DIO lt 0 3 gt configured for digital input and DIO lt 4 7 gt configured for digital output Digital input applications include receiving TTL
21. 4xR 785xR Calibration Procedure for NI RIO found on ni com manuals National Instruments Corporation 3 3 R Series Multifunction RIO User Manual Connecting 1 0 Signals This appendix describes how to make input and output signal connections to the NI 78xxR I O connectors Figure A 1 shows the I O connector pin assignments and locations for NI PCI 7811R 7813R and NI PXI 7811R 7813R Figure A 2 shows the I O connector pin assignments and locations for NI PCI 7830R 7831R 7833R NI PCIe 7841R 7842R 7851R 7852R and the NI PXI 7830R 7831R 7833R 7841R 7842R 7851R 7852R 7853R 7854R Note The NI PXI 7830R and NI PCI 7830R do not have Connector 2 RDIO National Instruments Corporation A 1 R Series Multifunction RIO User Manual Appendix Connecting 1 0 Signals DIO39 DIO37 01035 DIO33 DIO31 01029 01027 01026 01025 01024 DIO23 01022 01021 01020 01019 01018 01017 01016 01015 01014 01013 01012 01011 DIO10 g o S ofr 68 lt 67 C2 66 65 lt a 64 wo o 63 62 61 60 59 a 58 R 57 N Ka 56 55 a 54 53 52 51 50 49 a 48 AR 47 46 45
22. 78xxR device LabVIEW FPGA Module Release and Upgrade Notes Contains information about installing the LabVIEW FPGA Module describes new features and provides upgrade information To access this document refer to ni com manuals In LabVIEW 8 0 or later you can also view the LabVIEW Manuals directory that contains this document by selecting Start All Programs National Instruments LabVIEW Lab VIEW Manuals LabVIEW Real Time documentation R Series Multifunction RIO User Manual Getting Started with the LabVIEW Real Time Module Provides exercises to teach you how to develop a real time project and VIs from setting up RT targets to building debugging and deploying real time applications This document provides references to the LabVIEW Help and other Real Time Module documents for more information as you create the real time application To access this document refer to ni com manuals In LabVIEW 8 0 or later you can also view the LabVIEW Manuals directory that contains this document by selecting Start All Programs National Instruments LabVIEW LabVIEW Manuals Real Time Module book in the LabVIEW Help Select Help Search the LabVIEW Help in LabVIEW to view the LabVIEW Help Browse the Real Time Module book in the Contents tab for information about how to build deterministic applications using the LabVIEW Real Time Module LabVIEW Real Time Module Release and Upgrade Notes Includes information about system requirem
23. A 1 Power off and unplug the PXI CompactPCI chassis or PCI computer 2 Remove the NI 781xR 783xR from the PXI CompactPCI chassis or PCI computer 3 Move SWI to the ON position as shown in Figure 2 17b Reinsert the NI 781xR 783xR into the PXI CompactPCI chassis or PCI computer Refer to the Installing the Hardware section of the Getting Started with R Series Multifunction RIO document for installation instructions 5 Plug in and power on the PXI CompactPCI chassis or PCI computer After completing this procedure a VI stored in Flash memory does not load to the FPGA at power on You can use software to configure the NI 78xxR if necessary To return to the defaults of loading from Flash memory repeat the previous procedure but return SW1 to the OFF position in step 3 You can use this switch to enable disable the ability to load from Flash memory In addition to this switch you must configure the NI 78xxR with the software to autoload an FPGA VI Note When the NI 781xR 783xR is powered on with SW1 in the ON position the analog circuitry does not return properly calibrated data Move the switch to the ON position only while you are using software to reconfigure the NI 78 1xR 783xR for the desired power up behavior Afterward return SW1 to the OFF position 5 V Power Source The 5 V terminals on the I O connector supply 5 V referenced to DGND Use these terminals to power external circuitry Newer revision NI 781xR 783x
24. An instrument or device that has an isolated output is a floating signal source You must connect the ground reference of a floating signal to the NI 783xR 784xR 785xR AIGND through a bias resistor to establish a local or onboard reference for the signal Otherwise the measured input signal varies as the source floats out of the common mode input range Ground Referenced Signal Sources Input Modes A ground referenced signal source is connected to the building system ground so it is already connected to a common ground point with respect to the NI 783xR 784xR 785xR assuming that the computer is plugged into the same power system Instruments or devices with nonisolated outputs that plug into the building power system are ground referenced signal sources The difference in ground potential between two instruments connected to the same building power system is typically between 1 and 100 mV This difference can be much higher if power distribution circuits are improperly connected If a grounded signal source is improperly measured this difference might appear as a measurement error The connection instructions for grounded signal sources are designed to eliminate this ground potential difference from the measured signal The following sections discuss single ended and differential measurements and considerations for measuring both floating and ground referenced signal sources R Series Multifunction RIO User Manual 2 8 ni com Chap
25. DIO lines lt 0 15 gt correspond to the 5B backplane Slots lt 0 15 gt in sequential order The 5B connector pinouts are compatible with 8 channel 5B08 backplanes and 16 channel 5B01 backplanes The NI 7830R can accept analog input from the first four channels of a 16 channel backplane The NI 7831R 7833R 784xR 785xR can accept analog input from the first eight channels of a 16 channel backplane The SSR connector pinout is compatible with 8 16 24 and 32 channel SSR backplanes You can connect to an SSR backplane containing a number of channels unequal to the 16 DIO lines available on the 50 pin header In this case you have access to only the channels that exist on both the SSR backplane and the NSC68 262650 cable 50 pin header R Series Multifunction RIO User Manual A 6 ni com Appendix A Connecting 1 0 Signals Figure A 3 shows the connector pinouts when using the NSC68 262650 cable No Connect 1 2 No Connect No Connect 3 4 No Connect No Connect 5 6 No Connect No Connect 7 8 No Connect No Connect 9 10 No Connect No Connect 11 12 No Connect No Connect 13 14 No Connect No Connect 15 16 No Connect DIO15 17 18 No Connect 01014 19 20 No Connect DIO13 21 22 No Connect DIO12
26. Multifunction RIO NI Series Multifunction RIO User Manual NI 781xR NI 783xR NI 784xR and 785xR Devices Fran ais Deutsch HAG er m ni com manuals June 2009 NATIONAL 370489G 01 INSTRUMENTS Worldwide Technical Support and Product Information ni com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin Texas 78759 3504 USA Tel 512 683 0100 Worldwide Offices Australia 1800 300 800 Austria 43 662 457990 0 Belgium 32 0 2 757 0020 Brazil 55 11 3262 3599 Canada 800 433 3488 China 86 21 5050 9800 Czech Republic 420 224 235 774 Denmark 45 45 76 26 00 Finland 358 0 9 725 72511 France 01 57 66 24 24 Germany 49 89 7413130 India 91 80 41190000 Israel 972 3 6393737 Italy 39 02 41309277 Japan 0120 527196 Korea 82 02 3451 3400 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 328 90 10 Portugal 351 210 311 210 Russia 7 495 783 6851 Singapore 1800 226 5886 Slovenia 386 3 425 42 00 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 2005151 Taiwan 886 02 2377 2222 Thailand 662 278 6777 Turkey 90 212 279 3031 United Kingdom 44 0 1635 523545 For further support information refer to the Technical Support and Professional Services appendix To comment on National Instruments documentation refer t
27. NS DESIGNER ADVERSE FACTORS SUCH AS THESE ARE HEREAFTER COLLECTIVELY TERMED SYSTEM FAILURES ANY APPLICATION WHERE A SYSTEM FAILURE WOULD CREATE A RISK OF HARM TO PROPERTY OR PERSONS INCLUDING THE RISK OF BODILY INJURY AND DEATH SHOULD NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM DUE TO THE RISK OF SYSTEM FAILURE TO AVOID DAMAGE INJURY OR DEATH THE USER OR APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO PROTECT AGAINST SYSTEM FAILURES INCLUDING BUT NOT LIMITED TO BACK UP OR SHUT DOWN MECHANISMS BECAUSE EACH END USER SYSTEM IS CUSTOMIZED AND DIFFERS FROM NATIONAL INSTRUMENTS TESTING PLATFORMS AND BECAUSE A USER OR APPLICATION DESIGNER MAY USE NATIONAL INSTRUMENTS PRODUCTS IN COMBINATION WITH OTHER PRODUCTS IN A MANNER NOT EVALUATED OR CONTEMPLATED BY NATIONAL INSTRUMENTS THE USER OR APPLICATION DESIGNER IS ULTIMATELY RESPONSIBLE FOR VERIFYING AND VALIDATING THE SUITABILITY OF NATIONAL INSTRUMENTS PRODUCTS WHENEVER NATIONAL INSTRUMENTS PRODUCTS ARE INCORPORATED IN A SYSTEM OR APPLICATION INCLUDING WITHOUT LIMITATION THE APPROPRIATE DESIGN PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR APPLICATION Contents About This Manual Conventions eto EE ORO PER EU UN 1x Related Documentapon senes A et netten nennen nans seen 1x Software Documentation edet iid at ka ee Dest En Device Specific xi Additional RESOULCES
28. R devices have a traditional fuse to protect the supply from overcurrent conditions This fuse is not customer replaceable if the fuse permanently opens return the device to NI for repair R Series Multifunction RIO User Manual 2 26 ni com Chapter 2 Hardware Overview of the NI 78xxR Older revision NI 781xR 783xR devices have a self resetting fuse to protect the supply from overcurrent conditions This fuse resets automatically within a few seconds after the overcurrent condition is removed For more information about the self resetting fuse and precautions to take to avoid improper connection of 5 V and ground terminals refer to the KnowledgeBase document Self Resetting Fuse Additional Information by going to ni com info and entering the info code pptc NI 784xR 785xR Devices All NI 784xR 785xR devices have a user replaceable socketed fuse to protect the supply from overcurrent conditions When an overcurrent condition occurs check your cabling to the 5 V terminals and replace the fuse as described in the Device Fuse Replacement NI 784x R 785xR Only section UN Caution Never connect the 5 V power terminals to analog or digital ground or to any other voltage source on the NI 78xxR device or any other device Doing so can damage the device and the computer NI is not liable for damage resulting from such a connection The power rating on most devices is 4 75 to 5 25 VDC at 1 A Refer to the NI R Series Multifunction RIO Specif
29. RIO User Manual 2 4 ni com Chapter 2 Hardware Overview of the NI 78xxR Table 2 1 Ideal Output Code and Al Voltage Mapping Continued Output Code Hex Input Description AI Voltage Two s Complement Negative full scale range 1 LSB 9 999695 8001 Negative full scale range 10 000000 8000 Any input voltage Output Code 10 0 V doge t eem Input Modes The NI 783xR 784xR 785xR input mode is software configurable The input channels support three input modes differential DIFF referenced single ended RSE and nonreferenced single ended NRSE The selected input mode applies to all the input channels Table 2 2 describes the three input modes Table 2 2 Available Input Modes for the NI 783xR 784xR 785xR Input Mode Description DIFF When the NI 783xR 784xR 785xR is configured in DIFF input mode each channel uses two AI lines The positive input pin connects to the positive terminal of the onboard instrumentation amplifier The negative input pin connects to the negative input of the instrumentation amplifier RSE When the NI 783xR 784xR 785xR is configured in RSE input mode each channel uses only its positive AI pin This pin connects to the positive terminal of the onboard instrumentation amplifier The negative input of the instrumentation amplifier connects internally to the AI ground AIGND NRSE When the NI 783xR 784xR 785xR is configured in NRSE input mode each channe
30. a programmable threshold You can implement these behaviors in the hardware for fast deterministic performance Device Embedded Logic and Processing You can implement LabVIEW logic and processing in the FPGA of the R Series device Typical logic functions include Boolean operations comparisons and basic mathematical operations You can implement multiple functions efficiently in the same design operating sequentially or in parallel You also can implement more complex algorithms such as control loops You are limited only by the size of the FPGA R Series Multifunction RIO User Manual 1 4 ni com Chapter 1 Introduction Reconfigurable 1 0 Architecture Figure 1 1 shows an FPGA connected to fixed I O resources and a bus interface The fixed I O resources include A D converters ADCs D A converters DACs and digital I O lines Fixed I O Resource Fixed I O Resource FPGA Fixed I O Resource Fixed I O Resource Bus Interface Figure 1 1 High Level FPGA Functional Overview Software accesses the R Series device through the bus interface and the FPGA connects the bus interface and the fixed I O to make possible timing triggering processing and custom I O measurements using the LabVIEW FPGA Module The FPGA logic provides timing triggering processing and custom I O measurements Each fixed I O resource used by the application uses a small portion of the FPGA logic that contr
31. ational Instruments believes that the information in this document 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 NATIONAL 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 T
32. bles and Accessories National Instruments offers a variety of products you can use with R Series devices including cables connector blocks and other accessories as shown in Table 1 3 Table 1 3 R Series Connectivity Options Cable Connector NI 781xR NI 783xR 784x R 785xR Accessory Description SHC68 68 RMIO NI Recommended 0 NI SCB 68 High performance shielded cable wired specifically for signal connection from the RMIO connector to the NI SCB 68 terminal block to provide higher signal integrity and noise immunity SHC68 68 RDIO NI Recommended 0 1 2 3 1 2 NI SCB 68 High performance shielded cable wired specifically for signal connection from the RDIO connector to the NI SCB 68 terminal block to provide higher signal integrity and noise immunity SH68 C68 S 0 1 2 3 1 27 NI SCB 68 Basic shielded cable for signal connection from the RMIO or RDIO connector to the NI SCB 68 terminal block for noise reduction For a diagram of the twisted pairs in the SHC68 68 RMIO and SHC68 68 RDIO cables and the signals to which they correspond go to info and enter the info code rdrmio NI 7830R does not have Connector 2 Refer to Appendix A Connecting I O Signals for more information about using these cables and accessories to connect I O signals to the NI 78xxR Refer to ni com products or contact the sales of
33. ctive companies Members of the National Instruments Alliance Partner Program are business entities independent from National Instruments and have no agency partnership or joint venture relationship with National Instruments Patents For patents covering National Instruments products technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS 1 NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH COMPONENTS AND TESTING FOR A LEVEL OF RELIABILITY SUITABLE FOR USE IN OR IN CONNECTION WITH SURGICAL IMPLANTS OR AS CRITICAL COMPONENTS IN ANY LIFE SUPPORT SYSTEMS WHOSE FAILURE TO PERFORM CAN REASONABLY BE EXPECTED TO CAUSE SIGNIFICANT INJURY TO A HUMAN 2 IN ANY APPLICATION INCLUDING THE ABOVE RELIABILITY OF OPERATION OF THE SOFTWARE PRODUCTS CAN BE IMPAIRED BY ADVERSE FACTORS INCLUDING BUT NOT LIMITED TO FLUCTUATIONS IN ELECTRICAL POWER SUPPLY COMPUTER HARDWARE MALFUNCTIONS COMPUTER OPERATING SYSTEM SOFTWARE FITNESS FITNESS OF COMPILERS AND DEVELOPMENT SOFTWARE USED TO DEVELOP AN APPLICATION INSTALLATION ERRORS SOFTWARE AND HARDWARE COMPATIBILITY PROBLEMS MALFUNCTIONS OR FAILURES OF ELECTRONIC MONITORING OR CONTROL DEVICES TRANSIENT FAILURES OF ELECTRONIC SYSTEMS HARDWARE AND OR SOFTWARE UNANTICIPATED USES OR MISUSES OR ERRORS ON THE PART OF THE USER OR APPLICATIO
34. d online receives an answer Standard Service Program Membership This program entitles members to direct access to NI Applications Engineers via phone and email for one to one technical support as well as exclusive access to on demand training modules via the Services Resource Center NI offers complementary membership for a full year after purchase after which you may renew to continue your benefits For information about other technical support options in your area visit ni com services or contact your local office at ni com contact Training and Certification Visit ni com training for self paced training eLearning virtual classrooms interactive CDs and Certification program information You also can register for instructor led hands on courses at locations around the world System Integration If you have time constraints limited in house technical resources or other project challenges National Instruments Alliance Partner members can help To learn more call your local NI office or visit com alliance C 1 R Series Multifunction RIO User Manual Appendix Technical Support and Professional Services Declaration of Conformity DoC A DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electromagnetic compatibility EMC and product safety You can obtain the DoC for your product by visi
35. e ground point of the signal should be connected to AISENSE Any potential difference between the NI 783xR 784xR 785xR ground and the signal ground appears as common mode signal at both the positive and negative inputs of the instrumentation amplifier The instrumentation amplifier rejects this difference If the input circuitry of a NI 783xR 784xR 785xR is referenced to ground in RSE input mode this difference in ground potentials appears as an error in the measured voltage Figure 2 9 shows how to connect a grounded signal source to a channel on the NI 783xR 784xR 785xR configured for NRSE input mode UO Connector Al Ground 4 Ale Referenced V Instrumentation Signal 5 i Amplifier Source e Measured i Q Voltage MEN Common i Mode Noise and vn eee ese Sens ees susan saul Ground B AISENSE Potential vu AIGND NRSE Input Mode Selected Figure 2 9 Single Ended Input Connections for Ground Referenced Signals National Instruments Corporation 2 15 R Series Multifunction RIO User Manual Hardware Overview of the NI 78xxR Common Mode Signal Rejection Considerations Figure 2 6 and Figure 2 9 show connections for signal sources that are already referenced to some ground point with respect to the NI 783xR 784xR 785xR In these cases the instrumentation amplifier can reject any voltage caused by ground poten
36. ector 2 DIO RTS Bus e a E x a Digital UO 40 o Connector 3 DIO Figure 2 1 NI 781xR Block Diagram National Instruments Corporation 2 1 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR i i Calibration 1 i Input Mux D Configuration Flash Yn 1 Al Control Memory Ze i 1 gt gt Instrumentation s Al Ampliflier gt lp E 5 L fee c Channels a 9 Input Mode Mux E Oo z D v Voltage Temperature p User 5 gt Reference Sensor Configurable Bus H Calibration UR EE eege e FPGA on RIO Control Interface across 5 1 lt address Data gt Dat S ES 2 Calibration Devices SE Q Li 1 x i DACs x C TIERE o Digital 1 0 16 x Ka 5 Digital UO 40 2 PXI Local Bus NI PXI 7830R only o RTSI Bus WN RTSI PXI Triggers Figure 2 2 NI 7830R Block Diagram R Series Multifunction RIO User Manual 2 2 ni com Chapter 2 Hardware Overview of the NI 78xxR
37. els eight independent 16 bit AO channels 96 bidirectional DIO lines that you can configure individually for input or output and a Virtex II XC2V3000 FPGA NI 784xR Overview The NI 784xR each have eight independent 16 bit AI channels eight independent 16 bit AO channels and 96 bidirectional DIO lines that you can configure individually for input or output The NI PXI 7841R has a Virtex 5 LX30 FPGA and the NI PXI 7842R has a Virtex 5 LX50 FPGA NI 785xR Overview The NI 785xR each have eight independent 16 bit AI channels eight independent 16 bit AO channels and 96 bidirectional DIO lines that you can configure individually for input or output The NI PXI 7851R has a Virtex 5 LX30 FPGA the NI PXI 7852R has a Virtex 5 LX50 FPGA the NI PXI 7853R has a Virtex 5 LX85 FPGA and the NI PXI 7854R has a Virtex 5 LX110 FPGA Analog Input NI 783xR 784 xR 785xR Only You can sample NI 783xR 784xR 785xR AI channels simultaneously or at different rates The input mode is software configurable and the input range is fixed at 10 V The converters return data in two s complement format Table 2 1 shows the ideal output code returned for a given AI voltage Table 2 1 Ideal Output Code and AI Voltage Mapping Output Code Hex Input Description AI Voltage Two s Complement Full scale range 1 LSB 9 999695 7FFF Full scale range 2 LSB 9 999390 7FFE Midscale 0 000000 0000 R Series Multifunction
38. ents installation configuration new features and changes and compatibility issues for the LabVIEW Real Time Module To access this document refer to ni com manuals In LabVIEW 8 0 or later you can also view the LabVIEW Manuals X ni com About This Manual directory that contains this document by selecting Start All Programs National Instruments Lab VIEW Lab VIEW Manuals Device Specific Documentation Getting Started with R Series Multifunction RIO This document explains how to install and configure NI 781xR 783xR 784xR 785xR and contains a tutorial that demonstrates how to begin taking a measurement using LabVIEW FPGA This document is available at ni com manuals e NIR Series Multifunction RIO Specifications Lists the specifications of the NI 78 1xR 783xR 784xR 785xR Series devices This document is available at ni com manuals Additional Resources The following documents contain information you might find helpful e NI Developer Zone tutorial Field Wiring and Noise Considerations for Analog Signals at ni com zone e PICMG CompactPCI 2 0 R3 0 e PXI Hardware Specification Revision 2 1 e PXI Software Specification Revision 2 1 National Instruments Example Finder LabVIEW contains an extensive library of VIs and example programs for use with R Series devices To access the NI Example Finder open LabVIEW and select Help Find Examples then select Hardware Input and Output R Series e LabVIEW
39. fice nearest to you for the most current cabling options R Series Multifunction RIO User Manual 1 8 ni com Chapter 1 Introduction Custom Cabling NI offers a variety of cables for connecting signals to the NI 78xxR If you need to develop a custom cable a nonterminated shielded cable is available from NI The SHC68 NT S connects to the NI 78xxR VHDCI connectors on one end of the cable The other end of the cable is not terminated This cable ships with a wire list identifying the wires that correspond to each NI 78xxR pin You can use this cable to quickly connect the NI 78xxR signals that you need to the connector of your choice Refer to Appendix A Connecting I O Signals for the NI 78xxR connector pinouts National Instruments Corporation 1 9 R Series Multifunction RIO User Manual Hardware Overview of the NI 78xxR This chapter presents an overview of the hardware functions and I O connectors on the NI 78xxR Figure 2 1 shows a block diagram for the NI 781xR Figure 2 2 shows a block diagram for the NI 7830R Figure 2 3 shows a block diagram for the NI 7831R 7833R 78AxR 785xR Configuration Control dio Flash Memory Configuration User Configurable Bus quc Digital UO 40 FPGA on Data Address Control Interface Address Data RIO Devices Connector 0 DIO PCI PXI CompactPCI Bus Digital UO 40 PXI Local Bus NI PXI 781x R Only Connector 1 DIO Digital UO 40 Conn
40. gh 7 AIGND Analog Input Ground These pins are the reference point for single ended measurements in RSE configuration and the bias current return point for differential measurements All three ground references AIGND AOGND and DGND are connected to each other on the NI 783xR 784xR 785xR AISENSE AIGND Input Analog Input Sense This pin serves as the reference node for AI lt 0 7 gt when the device is configured for NRSE mode lt 0 7 gt AOGND Output Analog Output channels 0 through 7 Each channel can source or sink up to 2 5 mA AOGND Analog Output Ground The analog output voltages are referenced to this node All three ground references AIGND AOGND and DGND are connected to each other on the NI 783xR 784xR 785xR Digital Signals All NI 78xxR Devices DGND Digital Ground These pins supply the reference for the digital signals at the I O connector and the 5 V supply All three ground references AIGND AOGND and DGND are connected to each other on the NI 783xR T84xR 785xR DIO lt 0 39 gt DGND Input or Digital I O signals Connector lt 0 3 gt Output NI 781xR DIO lt 0 15 gt Connector 0 NI 783xR 784xR 785xR DIO lt 0 39 gt Connector lt 1 2 gt NI 783xR 784xR 785xR R Series Multifunction RIO User Manual A 4 ni com Appendix A Connecting 1 0 Signals Caution Connections that exceed any of the maximum ratings of input or o
41. h memory of the R Series device This utility installs with NI RIO You also can use the utility to configure the analog input mode to synchronize the clock on the R Series device to the PXI clock for NI PXI 78xxR only and to configure when the VI loads from Flash memory For more information about using the RIO Device Setup utility refer to the RIO Device Setup Help found at Start All Programs National Instruments NI RIO RIO Device Setup Help LabVIEW Real Time Module The LabVIEW Real Time Module extends the LabVIEW development environment to deliver deterministic real time performance You can write host VIs that run in Windows or on RT targets to communicate with FPGA VIs that run on the NI 78xxR You can develop real time VIs with LabVIEW and the LabVIEW Real Time Module and then download the VIs to run on a hardware target with a real time operating system The LabVIEW Real Time Module allows you to use the NI 78xxR in RT Series PXI systems being controlled in real time by a VI The NI 781xR is designed as a single point DIO complement to the LabVIEW Real Time Module The NI 783xR 784xR 785xR is designed as a single point AI AO and DIO complement to the LabVIEW Real Time Module Refer to the LabVIEW Help available by selecting Help Search the LabVIEW Help for more information about the LabVIEW Real Time Module National Instruments Corporation 1 7 R Series Multifunction RIO User Manual Chapter 1 Introduction Ca
42. he 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 National Instruments respects the intellectual property of others and we ask our users to do the same NI software is protected by copyright and other intellectual property laws Where NI software may be used to reproduce software or other materials belonging to others you may use NI software only to reproduce materials that you may reproduce in accordance with the terms of any applicable license or other legal restriction Trademarks National Instruments NI ni com and LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com legal for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respe
43. ications document available at com manuals to obtain the power rating for your device Device Fuse Replacement NI 784xR 785xR Only NI 784xR 785xR devices have a replaceable fuse Littelfuse part number 0453004 that protects the device from overcurrent through the power connector To replace a blown fuse in the NI 784xR 785xR complete the following steps 1 Power down and unplug the computer or PXI chassis 2 Remove the PCI PCI Express device from the expansion slot on the computer or the PXI device from the PXI slot in the PXI chassis National Instruments Corporation 2 27 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR 3 Replace the blown fuse while referring to Figure 2 18 for the fuse locations i 1 1 NI PCle 784xH 785xR Fuse Location 2 NI PXI 784xR 785xR Fuse Location Figure 2 18 NI 784xR 785xR Replacement Fuse Location Littelfuse Part Number 0453004 4 Reinstall the PCI PCI Express or PXI device into the computer or PXI chassis PCI Express Device Disk Drive Power Connector NI PCle 784xR 785xR Devices The disk drive power connector is a four pin hard drive connector on PCI Express devices that when connected increases the current the device can supply on the 5 V terminal When to Use the Disk Drive Power Connector PCI Express R Series devices without the disk drive power connector installed perform identically
44. iew of the NI 78xxR 44 2 I r Een eege PXI_Star 0500 eooo PXI_Star 9599 eooo PXI_Star 9599 OOo DODD EEEE EEEE EEEE LbrO LblO LbrO LblO Lbl1 Lbr1 Lbl1 Lbri LI Lbr1 Lbl2 Lbr2 Lbl2 Lbr2 Lbl2 Lbr2 LbI3 Lbr3 Lbr3 Lbr3 e Slot 2 Slot 3 Slot 4 D A Slot 2 device ties the PXI_Star Line to the PXI 10 MHz clock 1 Shared Local Bus Lines between Slot 2 and Slot 3 2 Shared Trigger Lines between Slot 2 Slot 3 and Slot 4 3 Shared Local Bus Lines between Slot 3 and Slot 4 Figure 2 12 PXI Star Trigger Connections in a PXI Chassis Refer to the PXI Hardware Specification Revision 2 1 and PXI Software Specification Revision 2 1 at www pxisa org for more information about PXI triggers Switch Settings NI 781xR 783xR Only Refer to Figure 2 13 for the location of switches on the NI PCI 781xR and Figure 2 14 for the location of switches on the NI PXI 781xR Refer to Figure 2 15 for the location of switches on the NI PCI 783xR and Figure 2 16 for the location of switches on the NI PXI 783xR For normal operation SW1 is in the OFF position To prevent a VI stored in Flash memory from loading to the FPGA at power up move SW to the ON position as shown in Figure 2 17
45. instrumentation amplifier converts two input signals to a signal that is the difference between the two input signals The amplifier output voltage is referenced to the device ground The NI 783xR 784xR 785xR ADC measures this output voltage when it performs A D conversions You must reference all signals to ground either at the source device or at the NI 783xR 784xR 785xR If you have a floating source reference the signal to ground by using RSE input mode or the DIFF input mode with bias resistors Refer to the Differential Connections for Nonreferenced or Floating Signal Sources section of this chapter for more information about these input modes If you have a grounded source do not reference the signal to AIGND You can avoid this reference by using DIFF or NRSE input modes National Instruments Corporation 2 7 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR Types of Signal Sources When configuring the input channels and making signal connections you must first determine whether the signal sources are floating or ground referenced The following sections describe these two signal types Floating Signal Sources A floating signal source is not connected to the building ground system but instead has an isolated ground reference point Some examples of floating signal sources are outputs of transformers thermocouples battery powered devices optical isolator outputs and isolation amplifiers
46. ion PWM encoder and counter signals Examples of static signals or non edge sensitive low frequency signals include LEDs switches and relays Table 2 4 summarizes these guidelines Table 2 4 DIO Signal Guidelines for the NI 78xxR SH68 C68 S Shielded Cable Recommended Types Device Digital Lines Signal Pairing of Digital Signals NI 781xR DIO 0 27 DIO line paired types high frequency or with power low frequency signals or ground edge sensitive or non edge sensitive signals DIO lt 28 39 gt DIO line paired Static signals or with another non edge sensitive DIO line low frequency signals NI 783xR Connector 0 DIO lt 0 7 gt DIO line paired All types high frequency or NI 784xR Connector 1 DIO lt 0 27 gt with power low frequency signals NI 785xR Connector 2 DIO lt 0 27 gt or ground edge sensitive or non edge sensitive signals Connector 0 DIO lt 8 15 gt DIO line paired Static signals or Connector 1 DIO lt 28 39 gt with another non edge sensitive Connector 2 DIO lt 28 39 gt DIO line low frequency signals R Series Multifunction RIO User Manual 2 20 ni com Chapter 2 Hardware Overview of the NI 78xxR RTSI Trigger Bus The NI 78xxR can send and receive triggers through the RTSI trigger bus The RTSI bus provides eight shared trigger lines that connect to all the devices on the bus In PXI the trigger lines are shared between all the PXI slots in a bus segment In PCI
47. is marked on a product it denotes a warning advising you to take precautions to avoid electrical shock When symbol is marked on a product it denotes a component that may be hot Touching this component may result in bodily injury NI 781xR 783xR NI 784xR and NI 785xR refer to all PCI PCI Express and PXI R Series devices Related Documentation The following documents contain information that you may find helpful as you use this help file Your documentation needs may vary depending on the hardware and software you use for your application Note Most Series manuals are available as PDFs You must have Adobe Reader with Search and Accessibility 5 0 5 or later installed to view the PDFs Refer to the Adobe Systems Incorporated Web site at www adobe com to download Adobe Reader Refer to ni com manuals for updated documentation resources National Instruments Corporation ix R Series Multifunction RIO User Manual About This Manual Software Documentation LabVIEW FPGA documentation Getting Started with LabVIEW FPGA 8 x This KnowledgeBase available at ni com kb provides links to the top resources that can be used to assist in getting started with programming in LabVIEW FPGA FPGA Module book in the LabVIEW Help Select Help Search the LabVIEW Help in LabVIEW to view the LabVIEW Help Browse the FPGA Module book in the Contents tab for information about using the FPGA Module to create VIs that run on the NI
48. iving can damage both devices NI is not liable for any damage resulting from such signal driving The NI PXI 781xR 783xR local bus lines are only compatible with 3 3 V signaling LVTTL and LVCMOS levels UN Caution Do not enable the local bus lines on an adjacent device if the device drives anything other than 0 3 3V LVTTL signal levels on the NI PXI 781xR 783xR Enabling the lines in this way can damage the NI PXI 781xR 783xR NI is not liable for any damage resulting from enabling such lines The left local bus lines from the left peripheral slot of a PXI backplane Slot 2 are routed to the star trigger lines of up to 13 other peripheral slots in a two segment PXI system This configuration provides a dedicated delay matched trigger signal between the first peripheral slot and the other peripheral slots for precise trigger timing signals For example as shown in Figure 2 12 an NI PXI 781xR 783xR in Slot 2 can send an independent trigger signal to each device plugged into Slots 3 15 using the PXI PXI Lbl 0 12 Each device receives its trigger signal on its own dedicated star trigger line ZA Caution Do not configure the NI 781xR 783xR and another device to drive the same physical star trigger line simultaneously Such signal driving can damage the NI 781xR 783xR and the other device NI is not liable for any damage resulting from such signal driving R Series Multifunction RIO User Manual 2 22 ni com Chapter 2 Hardware Overv
49. l Glossary PCI PCI Express port pu PWM PXI RAM resolution RIO rms RSE RTSI R Series Multifunction RIO User Manual G 6 Peripheral Component Interconnect A high performance expansion bus architecture originally developed by Intel to replace ISA and EISA It is achieving widespread acceptance as a standard for PCs and work stations PCI offers a theoretical maximum transfer rate of 132 MB s Peripheral Component Interconnect Express A version of PCI that maintains the PCI software usage model and replaces the physical bus with a high speed serial bus serving multiple lanes 1 A communications connection on a computer or a remote controller 2 A digital port consisting of four or eight lines of digital input and or output Pull up Pulse width modulation PCI eXtensions for Instrumentation An open specification that builds off the CompactPCI specification by adding instrumentation specific features Random access memory The generic term for the read write memory that is used in computers RAM allows bits and bytes to be written to it as well as read from Various types of RAM are DRAM EDO RAM SRAM and VRAM The smallest signal increment that can be detected by a measurement system Resolution can be expressed in bits in proportions or in percent of full scale For example a system has 12 bit resolution one part in 4 096 resolution and 0 0244 of full scale Reconfigurable I O Ro
50. l uses only its positive AI pin This pin connects to the positive terminal of the onboard instrumentation amplifier The negative input of the instrumentation amplifier on each AI channel connects internally to the AISENSE input pin Input Range The NI 783xR 784xR 785xR AI range is fixed at 10 V National Instruments Corporation 2 5 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR Connecting Analog Input Signals The AI signals for the NI 783xR 784xR 785xR are AI lt 0 n gt AI lt 0 n gt AIGND and AISENSE For the NI 7830R n 4 For the NI 7831R 7833R 784xR 785xR n 8 The AI lt 0 n gt and lt 0 gt signals are connected to the eight AI channels of the NI 783xR 784xR 785xR For all input modes the lt 0 gt signals are connected to the positive input of the instrumentation amplifier on each channel The signal connected to the negative input of the instrumentation amplifier depends on how you configure the input mode of the device In differential input mode signals connected to AI lt 0 n gt are routed to the negative input of the instrumentation amplifier for each channel In RSE input mode the negative input of the instrumentation amplifier for each channel is internally connected to AIGND In NRSE input mode the AISENSE signal is connected internally to the negative input of the instrumentation amplifier for each channel In DIFF and RSE input m
51. ltage to a digital number Analog input Analog input channel signal Analog input ground signal Analog input sense signal Analog output Analog output channel signal Analog output ground signal A signal range that includes both positive and negative values for example 5 to 5 V Celsius Calibration DAC Channel Pin or wire lead to which you apply or from which you read the analog or digital signal Analog signals can be single ended or differential For digital signals you group channels to form ports Ports usually consist of either four or eight digital channels Centimeter R Series Multifunction RIO User Manual G 2 National Instruments Corporation CMOS CMRR common mode voltage CompactPCI D A DAC DAQ dB DC DGND DIFF DIO DIO lt i gt DMA DNL DO National Instruments Corporation G 3 Glossary Complementary metal oxide semiconductor Common mode rejection ratio A measure of an instrument s ability to reject interference from a common mode signal usually expressed in decibels dB Any voltage present at the instrumentation amplifier inputs with respect to amplifier ground Refers to the core specification defined by the PCI Industrial Computer Manufacturer s Group PICMG Digital to analog Digital to analog converter An electronic device often an integrated circuit that converts a digital number into a corresponding analog voltage or current
52. nal source ground This kind of connection is required for signals traveling through areas with large magnetic fields or high electromagnetic interference Route signals to the device carefully Keep cabling away from noise sources The most common noise source in a PXI DAQ system is the video monitor Keep the monitor and the analog signals as far apart as possible Use the following recommendations for all signal connections to the NI 783xR 784xR 785xR Separate NI 783xR 784xR 785xR signal lines from high current or high voltage lines These lines can induce currents in or voltages on the NI 783xR 784xR 785xR signal lines if they run in parallel paths at a close distance To reduce the magnetic coupling between lines separate them by a reasonable distance if they run in parallel or run the lines at right angles to each other Do not run signal lines through conduits that also contain power lines Protect signal lines from magnetic fields caused by electric motors welding equipment breakers or transformers by running them through special metal conduits Refer to the NI Developer Zone tutorial Field Wiring and Noise Considerations for Analog Signals at ni com zone for more information R Series Multifunction RIO User Manual 2 30 ni com Calibration NI 783xR 784 xR 785xR Only Calibration is the process of determining and or adjusting the accuracy of an instrument to minimize measurement and output voltage errors On the
53. nect it to AIGND through a resistor that is about 100 times the equivalent source impedance The resistor puts the signal path nearly in balance About the same amount of noise couples onto both connections which yields better rejection of electrostatically coupled noise Also this input mode does not load down the source other than the very high input impedance of the instrumentation amplifier You can fully balance the signal path by connecting another resistor of the same value between the positive input and AIGND as shown in Figure 2 7 This fully balanced input mode offers slightly better noise rejection but has the disadvantage of loading down the source with the series combination sum of the two resistors If for example the source impedance is 2 kQ and each of the two resistors is 100 kQ the resistors load down the source with 200 and produce a 1 gain error Both inputs of the instrumentation amplifier require a DC path to ground for the instrumentation amplifier to work If the source is AC coupled capacitively coupled the instrumentation amplifier needs a resistor between the positive input and AIGND If the source has low impedance choose a resistor that is large enough not to significantly load the source but small enough not to produce significant input offset voltage as a result of input bias current typically 100 kQ to 1 MQ In this case connect the negative input directly to AIGND If the source has high output im
54. nnecting Analog Input Signals rennen 2 6 National Instruments Corporation V R Series Multifunction RIO User Manual Contents Types of Signal Sources ett AEN EP tee er E SR I e EE 2 8 Floating Signal Sources ette retra ipe EA 2 8 Ground Referenced Signal Sources 2 8 Input Modes eeepc t pe t e PP e Fi 2 8 Differential Connection Considerations DIFF Input Mode 2 10 Differential Connections for Ground Referenced Signal Sources 2 11 Differential Connections for Nonreferenced or Floating Signal Sources see 2 12 Single Ended Connection Considerations ees 2 13 Single Ended Connections for Floating Signal Sources RSE Input 2 14 Single Ended Connections for Grounded Signal Sources NRSE Input Mode 2 15 Common Mode Signal Rejection Constderatons esee 2 16 Analog Output eege ERR EH Ee ee ip o A EENS 2 16 Connecting Analog Output Signals eese eene 2 17 Digital IQ iced eie ob a te e ee s 2 17 Connecting Digital I O Signals esee eene rennen 2 17 RTS Trigger EE 2 21 PXI Local Bus NI PXI 781xR 783xR Only eene 2 21 Switch Settings NI 781xR 783xR Only 2 23 35 V Power Spe HE bred er 2 26 Device Fuse Replacement NI 784xR 785xR Only 2 27 PCI Express Device Disk D
55. o the National Instruments Web site at ni com info and enter the info code feedback 2003 2009 National Instruments Corporation All rights reserved Important Information Warranty The NI 7811R 7813R 7830R 7831R 7833R 7841R 7842R 785 1 R 7852R 7853R 7854R 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 receipts 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 N
56. odes AISENSE is not used Caution Exceeding the differential and common mode input ranges distorts the input signals Exceeding the maximum input voltage rating can damage the NI 783xR 784xR 785xR and the computer NI is not liable for any damage resulting from such signal connections The maximum input voltage ratings are listed in Table A 2 NI 78xxR I O Signal Summary AIGND is a common Al signal that is routed directly to the ground tie point on the NI 783xR 784xR 785xR You can use this signal for a general analog ground tie point to the NI 783xR 784xR 785xR if necessary R Series Multifunction RIO User Manual 2 6 ni com Chapter 2 Hardware Overview of the NI 78xxR Connection of AI signals to the NI 783xR 784xR 785xR depends on the input mode of the AI channels you are using and the type of input signal source With different input modes you can use the instrumentation amplifier in different ways Figure 2 4 shows a diagram of the NI 783xR 784xR 785xR instrumentation amplifier Vins Oo Instrumentation Amplifier T Measured Voltage Vin 0 Vin Ving Vin Figure 2 4 NI 783xR 784xR 785xR Instrumentation Amplifier The instrumentation amplifier applies common mode voltage rejection and presents high input impedance to the AI signals connected to the NI 783xR 784xR 785xR Input multiplexers on the device route signals to the positive and negative inputs of the instrumentation amplifier The
57. ols the fixed I O resource The bus interface also uses a small portion of the FPGA logic to provide software access to the device The remaining FPGA logic is available for higher level functions such as timing triggering and counting The functions use varied amounts of logic You can place useful applications in the FPGA How much FPGA space your application requires depends on your need for I O recovery I O and logic algorithms National Instruments Corporation 1 5 R Series Multifunction RIO User Manual Chapter 1 Introduction The FPGA does not retain the VI when the R Series device is powered off so you must reload the VI each time you power on the device You can load the VI from onboard Flash memory or from software over the bus interface One advantage to using Flash memory is that the VI can start executing almost immediately after power up instead of waiting for the computer to completely boot and load the FPGA VI Refer to the LabVIEW Help for more information about how to store your VI in Flash memory Reconfigurable 1 0 Applications You can use the LabVIEW FPGA Module to create or acquire new VIs for your application The FPGA Module allows you to define custom functionality for the R Series device using a subset of LabVIEW functionality Refer to the R Series examples available in LabVIEW by selecting Help Find Examples and then selecting Hardware Input and Output R Series for examples of FPGA VIs Software De
58. onnect No Connect DIO19 9 10 No Connect No Connect No Connect 01018 11 12 No Connect No Connect No Connect 01017 13 14 No Connect No Connect No Connect DIO16 15 16 No Connect No Connect No Connect 01015 17 18 No Connect DIO39 No Connect DIO14 19 20 DGND DIO38 No Connect DIO13 21 22 DIO37 No Connect 01012 23 24 DIO36 No Connect 01011 25 26 DIO35 No Connect DIO10 27 28 DIO34 No Connect DIO9 29 30 DIO33 No Connect DIO8 31 32 DIO32 DGND DIO7 33 34 01031 DIO6 35 36 DIO30 DGND DIO5 37 38 DIO29 DGND DIO4 39 40 DGND DIO28 DGND DIO3 41 42 DGND 01027 DIO2 43 44 DIO26 DGND DIO1 45 46 DGND DIO25 DGND DIOO 47 48 01024 DGND 5V 49 50 5V DGND DIO 0 23 Connector DIO 24 39 Connector Pin Assignment Pin Assignment R Series Multifunction RIO User Manual 8 Figure A 4 Connector Pinouts when Using the NSC68 5050 Cable ni com Using the SCB 68 Shielded Connector Block This appendix describes how to connect input and output signals to the NI 78xxR with the SCB 68 shielded connector block The SCB 68 has 68 screw terminals for I O signal connections To use the SCB 68 with the NI 78xxR you must configure the SCB 68 as a general purpose connector block Refer to Figure B 1 for the general purpose switch configuration
59. oratory Virtual Instrument Engineering Workbench LabVIEW is a graphical programming language that uses icons instead of lines of text to create programs Least significant bit R Series Multifunction RIO User Manual G 4 National Instruments Corporation min MIO monotonicity mux noise NRSE OUT Glossary Meter Maximum Minimum Multifunction I O A characteristic of a DAC in which the analog output always increases as the values of the digital code input to it increase Multiplexer A switching device with multiple inputs that sequentially connects each of its inputs to its output typically at high speeds in order to measure several signals with a single analog input channel An undesirable electrical signal Noise comes from external sources such as the AC power line motors generators transformers fluorescent lights CRT displays computers electrical storms welders radio transmitters and internal sources such as semiconductors resistors and capacitors Noise corrupts signals you are trying to send or receive Nonreferenced single ended mode Al measurements are made with respect to a common NRSE measurement system reference but the voltage at this reference can vary with respect to the measurement system ground Output pin A counter output pin where the counter can generate various TTL pulse waveforms National Instruments Corporation G 5 R Series Multifunction RIO User Manua
60. ot mean square Referenced single ended mode Al measurements are made with respect to acommon reference measurement system or a ground Also called a grounded measurement system Real time system integration bus The timing and triggering bus that connects multiple devices directly This allows for hardware synchronization across devices National Instruments Corporation S s signal conditioning slew rate THD thermocouple TTL two s complement VDC VHDCI VI National Instruments Corporation G 7 Glossary Seconds Samples Samples per second Used to express the rate at which a DAQ board samples an analog signal The manipulation of signals to prepare them for digitizing The voltage rate of change as a function of time The maximum slew rate of an amplifier is often a key specification to its performance Slew rate limitations are first seen as distortion at higher signal frequencies Total harmonic distortion The ratio of the total rms signal due to harmonic distortion to the overall rms signal in decibel or a percentage A temperature sensor created by joining two dissimilar metals The junction produces a small voltage as a function of the temperature Transistor transistor logic Given a number x expressed in base 2 with n digits to the left of the radix point the base 2 number 2n x Volts Volts direct current Very high density cabled interconnect Virtual instrumen
61. pedance balance the signal path as previously described using the same value resistor on both the positive and negative inputs Loading down the source causes some gain error Single Ended Connection Considerations When an NI 783xR 784xR 785xR AI signal is referenced to a ground that can be shared with other input signals it forms a single ended connection The input signal connects to the positive input of the instrumentation amplifier and the ground connects to the negative input of the instrumentation amplifier You can use single ended input connections for any input signal that meets the following conditions e The input signal is high level 21 V e The leads connecting the signal to the NI 783xR 784xR 785xR are less than 3 m 10 ft e The input signal can share a common reference point with other signals National Instruments Corporation 2 13 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR Use DIFF input connections for greater signal integrity for any input signal that does not meet the preceding conditions You can configure the NI 783xR 784xR 785xR channels in software for RSE or NRSE input modes Use the RSE input mode for floating signal sources In this case the NI 783xR 784xR 785xR provides the reference ground point for the external signal Use the NRSE input mode for ground referenced signal sources In this case the external signal supplies its own reference ground poin
62. rive Power Connector 2 28 When to Use the Disk Drive Power Connector eee 2 28 Disk Drive Power Connector Installation eese 2 29 Field Wiring Considerations NI 783xR 784xR 785xR Only 2 30 Chapter 3 Calibration NI 783xR 784xR 785xR Only Loading Calibration Constant esses 3 1 SelfzCalibr tion 35 uu nt ere EE e de vei ee t e e te denial 3 1 External Calbrapnon e I n nennen nenne enhn nennt nne te nen nnns essa nass seen 3 2 Appendix A Connecting 1 0 Signals Appendix B Using the SCB 68 Shielded Connector Block R Series Multifunction RIO User Manual vi ni com Contents Appendix C Technical Support and Professional Services Glossary National Instruments Corporation vii R Series Multifunction RIO User Manual About This Manual Conventions This manual describes the electrical and mechanical aspects of the National Instruments 78 1xR 783xR 784xR 785xR devices and contains information about programming and using the devices 5 A A A NI 78xxR The following conventions appear in this manual This icon denotes a note which alerts you to important information This icon denotes a caution which advises you of precautions to take to avoid injury data loss or a system crash When this symbol is marked on a product refer to the Read Me First Safety and Electromagnetic Compatibility document for information about precautions to take When symbol
63. rive Power Connector 4 Replace the computer cover and plug in and power on the computer 5 Usethe NI 78xxR Calibration Utility to run a self calibration on the NI PCIe 784xR 785xR device Refer to the Self Calibration section of Chapter 3 Calibration NI 753x R 784x R 785xR Only for more information Note Connecting or disconnecting the disk drive power connector can affect the analog performance of your device To compensate for this NI recommends that you self calibrate after connecting or disconnecting the disk drive power connector National Instruments Corporation 2 29 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR Field Wiring Considerations NI 783xR 784xR 785xR Only Environmental noise can seriously affect the measurement accuracy of the device if you do not take proper care when running signal wires between signal sources and the device The following recommendations mainly apply to AI signal routing to the device as well as signal routing in general Take the following precautions to minimize noise pickup and maximize measurement accuracy Use differential AI connections to reject common mode noise Use individually shielded twisted pair wires to connect AI signals to the device With this type of wire the signals attached to the positive and negative inputs are twisted together and then covered with a shield You then connect this shield only at one point to the sig
64. roduction PXI specific features are implemented on the J2 connector of the CompactPCI bus Table 1 2 lists the J2 pins used by the NI PXI 78xxR The NI 78xxR is compatible with any CompactPCI chassis with a sub bus that does not drive these lines Even if the sub bus is capable of driving these lines the R Series device is still compatible as long as those pins on the sub bus are disabled by default and are never enabled UN Caution Damage can result if the J2 lines are driven by the sub bus Table 1 2 Pins Used by the NI PXI 78xxR NI PXI 78xxR Signal PXI Pin Name PXI J2 Pin Number PXI_Trig lt 0 7 gt PXI Trigger lt 0 7 gt 16 A17 A18 B16 B18 C18 E16 E18 PXI CIK10 PXI Clock 10 MHz E17 PXI Star PXI Star Trigger D17 PXI_Lbl lt 0 12 gt LBL lt 0 12 gt Al A19 C1 C19 C20 D1 D2 D15 D19 E1 E2 E19 E20 PXI Lbr 0 12 LBR 0 12 A2 A3 A20 A21 B2 B20 C3 C21 D3 D21 E3 E15 E21 NI PXI 781xR 783xR only Overview of Reconfigurable 1 0 This section explains reconfigurable I O and describes how to use the LabVIEW FPGA Module to build high level functions in hardware Refer to Chapter 2 Hardware Overview of the NI 78xxR for descriptions of the I O resources on the NI 78xxR Reconfigurable 1 0 Concept R Series Multifunction RIO devices are based on a reconfigurable FPGA core surrounded by fixed I O resources for analog and digital input and output
65. s Connecting to 5B and SSR Analog Signal Conditioning NI 783xR 784xR 785xR Only NI provides cables that allow you to connect signals from the NI 783xR 784xR 785xR directly to 5B backplanes for analog signal conditioning and SSR backplanes for digital signal conditioning The NSC68 262650 cable connects the signals on the NI 783xR 784xR 785xR RMIO connector directly to 5B and SSR backplanes This cable has a 68 pin male VHDCI connector on one end that plugs into the NI 783xR 784xR 785xR RMIO connector The other end of this cable provides two 26 pin female headers plus one 50 pin female header One of the 26 pin headers contains all the NI 783xR 784xR 785xR analog input signals You can plug this connector directly into a 5B backplane for analog input signal conditioning The NI 783xR 784xR 785xR AI lt 0 n gt correspond to the 5B backplane channels lt 0 gt in sequential order Configure the AI channels to use the NRSE input mode when using 5B signal conditioning The other 26 pin header contains all the NI 783xR 784xR 785xR analog output signals You can plug this connector directly into a 5B backplane for AO signal conditioning The NI 783xR 784xR 785xR AO lt 0 n gt correspond to the 5B backplane channels lt 0 n gt in sequential order The 50 pin header contains the 16 DIO lines available on the NI 783xR 784xR 785xR RMIO connector You can plug this header directly into an SSR backplane for digital signal conditioning
66. sults of a self calibration so the CalDACs automatically load with the newly calculated calibration constants the next time the NI 783xR 784xR 785xR is powered on External Calibration An external calibration refers to calibrating your device with a known external reference rather than relying on the onboard reference The NI 783xR 784xR 785xR has an onboard calibration reference to ensure the accuracy of self calibration The reference voltage is measured at the factory and stored in the Flash memory for subsequent self calibrations Externally calibrate the device annually or more often if you use it at extreme temperatures During the external calibration process the onboard reference value is re calculated This compensates for any time or temperature drift related errors in the onboard reference that might have occurred since the last calibration You can save the results of the external calibration process to Flash memory so that the NI 783xR 784xR 785xR loads the new calibration constants the next time it is powered on The device uses the newly measured onboard reference level for subsequent self calibrations R Series Multifunction RIO User Manual 3 2 ni com Chapter 3 Calibration NI 783xR 784x R 785xR Only To externally calibrate your device use an external reference several times more accurate than the device itself For more information on externally calibrating your NI 783xR 784xR 785xR device refer to the NI 783xR 78
67. t Program in LabVIEW that models the appearance and function of a physical instrument Volts input high Volts input low R Series Multifunction RIO User Manual Glossary Volts output high VoL Volts output low V ans Volts root mean square waveform Multiple voltage readings taken at a specific sampling rate R Series Multifunction RIO User Manual G 8 National Instruments Corporation
68. t and the NI 783xR 784xR 785xR should not supply one In single ended input modes electrostatic and magnetic noise couples into the signal connections more than in differential input modes The coupling is the result of differences in the signal path Magnetic coupling is proportional to the area between the two signal conductors Electrical coupling is a function of how much the electric field differs between the two conductors Single Ended Connections for Floating Signal Sources RSE Input Mode Figure 2 8 shows how to connect a floating signal source to a channel on the NI 783xR 784xR 785xR configured for RSE input mode Al Floating Signal Vs Source Instrumentation Measured _ Voltage Amplifier m Connector RSE Input Mode Selected Figure 2 8 Single Ended Input Connections for Nonreferenced or Floating Signals R Series Multifunction RIO User Manual 2 14 ni com Chapter 2 Hardware Overview of the NI 78xxR Single Ended Connections for Grounded Signal Sources NRSE Input Mode To measure a grounded signal source with a single ended input mode you must configure the NI 783xR 784xR 785xR in the NRSE input mode Then connect the signal to the positive input of the NI 783xR 784xR 785xR instrumentation amplifier and connect the signal local ground reference to the negative input of the instrumentation amplifier Th
69. t any external signal connections NI provides software to perform an self calibration This internal self calibration process which generally takes less than two minutes is the preferred method of assuring accuracy in your National Instruments Corporation 3 1 R Series Multifunction RIO User Manual Chapter 3 Calibration NI 783x R 784x R 785xR Only application Self calibration minimizes the effects of any offset and gain drifts particularly those due to changes in temperature During the self calibration process the AI and AO channels are compared to the NI 783xR 784xR 785xR onboard voltage reference The offset and gain errors in the analog circuitry are calibrated out by adjusting the CalDACs to minimize these errors 3 Note The NI 78xxR Calibration Utility does not support NI 781xR devices If you have NI RIO installed you can find the self calibration utility at Start All Programs National Instruments NI RIO Calibrate 78xxR Device Device is the NI PXI 783xR 784xR 785xR or NI PCI 783xR device Immediately after self calibration the only significant residual calibration error is gain error due to time and temperature drift of the onboard voltage reference You can minimize gain errors by performing an external calibration If you are primarily taking relative measurements then you can ignore a small amount of gain error and self calibration is sufficient The Flash memory on the NI 783xR 784xR 785xR stores the re
70. t mode the NI 783xR 784xR 785xR measures the difference between the positive and negative inputs DIFF input mode is ideal for measuring ground referenced signals from other devices When using DIFF input mode the input signal connects to the positive input of the instrumentation amplifier and its reference signal or return connects to the negative input of the instrumentation amplifier Use differential input connections for any channel that meets any of the following conditions The input signal is low level less than 1 V e The leads connecting the signal to the NI 783xR 784xR 785xR are greater than 3 m 10 ft e The input signal requires a separate ground reference point or return signal e signal leads travel through noisy environments Differential signal connections reduce noise pickup and increase common mode noise rejection Differential signal connections also allow input signals to float within the common mode limits of the instrumentation amplifier R Series Multifunction RIO User Manual 2 10 ni com Chapter 2 Hardware Overview of the NI 78xxR Differential Connections for Ground Referenced Signal Sources Figure 2 6 shows how to connect a ground referenced signal source to a channel on the NI 783xR 784xR 785xR configured in DIFF input mode Ground Referenced Signal Source Common Mode Noise and Ground Potential 7 o Al Instrumentation oo
71. tegration RTSTI bus to easily synchronize several measurement functions to a common trigger or timing event R Series PCI devices access the RTSI bus through a RTSI cable connected between devices R Series PXI devices access the RTSI bus through the PXI trigger lines implemented on the PXI backplane Refer to the NI R Series Multifunction RIO Specifications available at ni com manuals for detailed device specifications Using PXI with CompactPCl Using PXI compatible products with standard CompactPCI products is an important feature provided by PXI Hardware Specification Revision 2 1 and PXI Software Specification Revision 2 1 If you use a PXI compatible plug in card in a standard CompactPCI chassis you cannot use PXI specific functions but you still can use the basic plug in card functions For example the RTSI bus on the R Series device is available in a PXI chassis but not in a CompactPCI chassis The CompactPCI specification permits vendors to develop sub buses that coexist with the basic PCI interface on the CompactPCI bus Compatible operation is not guaranteed between CompactPCI devices with different sub buses nor between CompactPCI devices with sub buses and PXI The standard implementation for CompactPCI does not include these sub buses The R Series device works in any standard CompactPCI chassis adhering to the PICMG CompactPCI 2 0 R3 0 core specification R Series Multifunction RIO User Manual 1 2 ni com Chapter 1 Int
72. ter 2 Hardware Overview of the NI 78xxR Figure 2 5 summarizes the recommended input mode for both types of signal sources Input Signal Source Type Floating Signal Source Grounded Signal Source Not Connected to Building Ground Examples Examples Ungrounded Thermocouples Plug in Instruments with Signal Conditioning with Nonisolated Outputs Isolated Outputs Battery Devices Al lt i gt Al lt i gt e ge Vi Al i 5 1 lt Differential DIFF i AIGND i AIGND lt i gt E See text for information on bias resistors NOT RECOMMENDED Al lt i gt Al of 1 e 0 Single Ended 1 See e Ground b Referenced RSE AIGND Ground loop losses Va are added to measured signal Al lt i gt Al lt i gt Vi AISENSE p Vi AISENSE Single Ended D PEE Nonreferenced NRSE AIGND lt i gt gt ANN AIGND lt i gt See text for information on bias resistors Figure 2 5 Summary of Analog Input Connections National Instruments Corporation 2 9 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR Differential Connection Considerations DIFF Input Mode In DIFF inpu
73. the AO channel voltage output will be undefined R Series Multifunction RIO User Manual ni com Chapter 2 Hardware Overview of the NI 78xxR Connecting Analog Output Signals The AO signals are AO lt 0 n gt and AOGND AO lt 0 n gt are the AO channels AOGND is the ground reference signal for the AO channels Figure 2 10 shows how to make AO connections to the NI 783xR T84xR 785xR AO0 0 Load AOGNDO VOUTO NI 783xR 784xR 785xR Figure 2 10 Analog Output Connections Digital 1 0 You can configure the NI 78xxR DIO lines individually for either input or output When the system powers on the DIO lines are at high impedance To set another power on state you can configure the NI 78xxR to load a VI when the system powers on The VI can then set the DIO lines to any power on state Connecting Digital 1 0 Signals The DIO signals on the NI 78xxR RDIO connectors are DGND and DIO lt 0 39 gt The DIO signals on the NI 783xR 784xR 785xR RMIO connector are DGND and DIO lt 0 15 gt The DIO lt 0 n gt signals make up the DIO port and DGND is the ground reference signal for the DIO port The NI 781xR has four RDIO connectors for a total of 160 DIO lines The National Instruments Corporation 2 17 R Series Multifunction RIO User Manual Chapter 2 Hardware Overview of the NI 78xxR NI 7830R has one RMIO and one
74. tial differences between the signal source and the device With differential input connections the instrumentation amplifier can reject common mode noise pickup in the leads connecting the signal sources to the device The instrumentation amplifier can reject common mode signals when V and V in input signals are both within their specified input ranges Refer to the NI R Series Multifunction RIO Specifications available at ni com manuals for more information about input ranges Analog Output The bipolar output range of the NI 783xR 784xR 785xR AO channels is fixed at 10 V Some applications require that the AO channels power on to known voltage levels To set the power on levels you can configure the NI 783xR 784xR 785xR to load and run a VI when the system powers on The VI can set the AO channels to the desired voltage levels The VI interprets data written to the DAC in two s complement format Table 2 3 shows the ideal AO voltage generated for a given input code Table 2 3 Ideal Output Voltage and Input Code Mapping Input Code Hex Output Description AO Voltage Two s Complement Full scale range 1 LSB 9 999695 7FFF Full scale range 2 LSB 9 999390 7FFE Midscale 0 000000 0000 Negative full scale range 1 LSB 9 999695 8001 Negative full scale range 10 000000 8000 Any output voltage ET x 32 768 ER Note If your VI does not set the output value for an AO channel then
75. ting ni com certification e Calibration Certificate If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration If you searched ni com and could not find the answers you need contact your local office or NI corporate headquarters Phone numbers for our worldwide offices are listed at the front of this manual You also can visit the Worldwide Offices section of ni com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers email addresses and current events R Series Multifunction RIO User Manual C 2 ni com Glossary Symbol Prefix Value p pico 10 12 n nano 107 u micro 10 6 m milli 10 3 k kilo 103 M mega 106 G giga 10 Numbers Symbols Degrees gt Greater than 2 Greater than or equal to lt Less than lt Less than or equal to Negative of or minus Q Ohms Per K Percent Plus or minus Positive of or plus Square root of 45V 5 VDC source signal National Instruments Corporation G 1 R Series Multifunction RIO User Manual Glossary A A A D AC ADC AI Al lt i gt AIGND AISENSE AO AO lt i gt AOGND bipolar CalDAC CH cm Amperes Analog to digital Alternating current Analog to digital converter An electronic device often an integrated circuit that converts an analog vo
76. tioning This cable has a 68 pin male VHDCI connector on one end that plugs into the NI 78xxR RDIO connectors The other end of this cable provides two 50 pin female headers National Instruments Corporation A 7 R Series Multifunction RIO User Manual Appendix Connecting 1 0 Signals You can plug each of these 50 pin headers directly into an 8 16 24 or 32 channel SSR backplane for digital signal conditioning One of the 50 pin headers contains DIO lt 0 23 gt from the NI 78xxR RDIO connector These lines correspond to Slots lt 0 23 gt on an SSR backplane in sequential order The other 50 pin header contains DIO lt 24 39 gt from the NI 78xxR RDIO connector These lines correspond to Slots lt 0 15 gt on an SSR backplane in sequential order You can connect to an SSR backplane containing a number of channels unequal to the number of lines on the NSC68 5050 cable header In this case you have access only to the channels that exist on both the SSR backplane and the NSC68 5050 cable header you are using Figure A 4 shows the connector pinouts when using the NSC68 5050 cable DIO23 1 2 No Connect No Connect No Connect DIO22 3 4 No Connect No Connect No Connect DIO21 5 6 No Connect No Connect No Connect DIO20 7 8 No Connect No C
77. urrent 2 K i Return i b ol JAISENSE s AIGND Connector V DIFF Input Mode Selected Figure 2 7 Differential Input Connections for Nonreferenced Signals Figure 2 7 shows two bias resistors connected in parallel with the signal leads of a floating signal source If you do not use the resistors and the source is truly floating the source might not remain within the common mode signal range of the instrumentation amplifier causing erroneous readings You must reference the source to AIGND by connecting the positive side of the signal to the positive input of the instrumentation amplifier and connecting the negative side of the signal to AIGND and to the negative input of the instrumentation amplifier without resistors This connection works well for DC coupled sources with low source impedance less than 100 For larger source impedances this connection leaves the differential signal path significantly out of balance Noise that couples electrostatically onto the positive line does not couple onto the negative line because it is connected to ground Hence this noise appears as a differential mode signal instead of a common mode signal and the instrumentation amplifier does not reject it In this case instead of directly connecting the negative R Series Multifunction RIO User Manual 2 12 ni com Chapter 2 Hardware Overview of the NI 78xxR line to AIGND con
78. utput signals on the NI 78xxR can damage the NI 78xxR and the computer Maximum input ratings for each signal are in the Protection column of Table 2 NI is not liable for any damage resulting from such signal connections Table 2 NI 78xxR 1 0 Signal Summary Signal Impedance Protection Typeand Input Volts Source Sink Signal Name Direction Output On Off mA at V mA at V Rise Time Bias 45V DO Analog Signals NI 783xR 784xR 785xR Only AI lt 0 7 gt Al 10 GQ in 42 35 2 nA parallel with 100 pF 1 lt 0 7 gt 10 GQ in 42 35 2 nA parallel with 100 pF AIGND AO AISENSE AI 10 GO in 42 35 2 nA parallel with 100 pF AO lt 0 7 gt AO 1250 Short 2 5 at 10 2 5 at 10 10 V us circuit to ground AOGND AO Digital Signals All NI 78xxR Devices DIO lt 0 39 gt DIO 0 5to 47 0 4 0 at 2 4 4 0 at 0 4 Connector lt 0 3 gt NI 783xR NI 781xR 20 to 20 DIO lt 0 15 gt NI 784xR Connector 0 NI 785xR NI 783xR NI 784xR and NI 785xR DIO lt 0 39 gt Connector lt 1 2 gt NI 783xR NI 784xR and NI 785xR AI Analog Input Analog Output DIO Digital Input Output DO Digital Output National Instruments Corporation 5 R Series Multifunction RIO User Manual Appendix Connecting 1 0 Signal
79. velopment You can use LabVIEW with the LabVIEW FPGA Module to program the NI 78xxR To develop real time applications that control the NI 78xxR use LabVIEW with the LabVIEW Real Time Module LabVIEW FPGA Module The LabVIEW FPGA Module enables you to use LabVIEW to create VIs that run on the FPGA of the R Series target device Use the FPGA Module VIs and functions to control the I O timing and logic of the R Series device and to generate interrupts for synchronization Select Help Search the LabVIEW Help to view the LabVIEW Help In the LabVIEW Help use the Contents tab to browse to the FPGA Interface book for more information about the FPGA Interface functions You can use Interactive Front Panel Communication to communicate directly with the FPGA VI running on the FPGA target You can use Programmatic FPGA Interface Communication to programmatically control and communicate with FPGA VIs from host VIs Use the FPGA Interface functions when you target Lab VIEW for Windows or an RT target to create host VIs that wait for interrupts and control the FPGA by reading and writing the FPGA VI running on the R Series device R Series Multifunction RIO User Manual 1 6 ni com Chapter 1 Introduction 5 Note If you use the Series device without FPGA Module you can use RIO Device Setup utility available by selecting Start All Programs National Instruments NI RIO RIO Device Setup to download precomplied FPGA VIs to the Flas

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