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Reconfigurable I/O NI 783 x R User Manual Reconfigurable I/O Devices for PCI/PXI/CompactPCI Bus Computers NI 783xR User Manual May 2005 370489C-01.
Support Worldwide Technical Support and Product Info rmation ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Aust in, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide O.
Important Information Warranty The NI 78 30R/7831R/ 7833R is warranted against defects in mat erials and workmanship for a period of one year from the date of shipmen t, as evidenced by recei pts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty peri od.
Compliance Compliance with FCC/Canada Radio Frequency Interference Regulations Determining FCC Class The Federal Communications Commission (FCC) has rules to protect wireless co mmunications from inte rference. The FCC places digital electronics into two classes.
© National Instruments Corporation v NI 783xR User Manual Contents About This Manual Conventions ............ .............. .............. .............. .............. .............. ............... .............. .... v ii Reconfigurable I/O Documentation .
Contents NI 783xR User Manual vi ni.com Input Modes ..... .............. .............. .............. .............. .............. .............. .............. ............ 2 -6 Differential Connection Co nsiderations (DIFF Input Mode) ............
© National Instruments Corporation vii NI 783xR User Manual About This Manual This manual describes the electrical and mechanical aspects of the National Instruments 783 x R devices and contains information about programming and using t he devices.
About This Manual NI 783xR User Manual viii ni.com Reconfigurable I/O Documentation The NI 783xR User Manual is one piece of the do cumentation set for your reconfigurable I/O system and appli cation. Depend ing on the hard ware and software you use for your application, you could have an y of se veral types of documentation.
About This Manual © National Instruments Corporation ix NI 78 3xR User Manual Related Documentation The following documents contain information you migh t find helpful: • NI Dev eloper Zone tutorial, Field Wiring and Noise Considerati ons for Analog Signals , at ni.
© National Instruments Corporation 1-1 NI 783xR User Manual 1 Introduction This chapter describes the NI 783 x R, the concept of the Reconfigurable I/O (RIO) device, optional software and equipm ent for using the NI 783 x R, and safety informatio n about the NI 783 x R.
Chapter 1 Introduction NI 783xR User Manual 1-2 ni.com The NI 78 3 x R uses the Real-T ime System In te gration (R TSI) bus to easily synchronize sev eral measurement functions to a common trigg er or timing ev ent. The NI PCI-783 x R accesses the R TSI b us through a R TSI cable connected between devices.
Chapter 1 Introduction © National Instruments Corporation 1-3 NI 783xR User Manual Over view of Reconfigurable I/O This section explains reconfigurable I/O and describes how to use the LabVIEW FPGA Module to build high-level functions in hardware.
Chapter 1 Introduction NI 783xR User Manual 1-4 ni.com User -Defined I/O Resources You can create your own custom m easurements using the fixed I/O resources. For example, one application migh t require an event counter that increments when a rising edge appears on any of three digital input lines.
Chapter 1 Introduction © National Instruments Corporation 1-5 NI 783xR User Manual The FPGA logic provides timing, triggerin g, processing, and custom I/O measurements. Each fix ed I/O resource used by the applica tion uses a small portion of the FPGA logic that contro ls the fixed I/O resource.
Chapter 1 Introduction NI 783xR User Manual 1-6 ni.com FPGA Interface User Guide , for information about the FPGA Interface functions. Y ou can use Interactive Front P a nel Communicati on to communicate directly with the V I running on th e FPGA.
Chapter 1 Introduction © National Instruments Corporation 1-7 NI 783xR User Manual Cables and Optional Equipment National Instruments offers a v ariety of products you can use with R Series devices, including cables, connector blocks, and other accessories, as shown in Table 1-2.
Chapter 1 Introduction NI 783xR User Manual 1-8 ni.com Refer to Appendix B, Connecting I/O Signal s , for more information about using these cables and accessories to connect I/O signals to the NI 783 x R. Refer to ni.com/products or contact the sales of f ice nearest to you for the most current cabling options.
Chapter 1 Introduction © National Instruments Corporation 1-9 NI 783xR User Manual signals that you need to the connector of your choice. Refer to Appendix B, Connecting I/O Signals , for the NI 783 x R connector pinout s.
Chapter 1 Introduction NI 783xR User Manual 1-10 ni.com to the system. Remove po wer from signal lines before connecting them to or disconnecting them from the NI 783 x R. Operate the NI 783 x R at or below the measurement category 1 li sted in the section Maximum worki ng voltage , in Appendix A, Specifications .
© National Instruments Corporation 2-1 NI 783xR User Manual 2 Hardware Over view of the NI 783 x R This chapter presents an overview of the hardware functions and I/O connectors on the NI 783 x R. Figure 2-1 shows a block diagram for the NI 7830R. Figure 2-2 shows a block diagram for the NI 7831R/7 833R.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-2 ni.com Figure 2-2. NI 7831R/7833R Block Diagram NI 7830R Over view The NI 7830R has four independent, 16-b it AI channels; four independen t, 16-bit AO channels; and 56 bidirecti onal DIO lines that you can configure individually for inp ut or output.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-3 NI 783xR User Manual ± 10 V . The con verters return data in two’ s complement for mat. Table 2-1 shows the ideal output code returned for a given AI voltage. Input Modes The NI 783 x R input mode i s software configurable.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-4 ni.com Input Range The NI 783 x R AI range is fixed at ± 10 V. Connecting Analog Input Signals The AI signals for the NI 783 x R are A I<0.. n >+, AI<0.. n > –, AIGND, and AISENSE.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-5 NI 783xR User Manual Figure 2-3. NI 783 x R Instrumentation Amplifier The instrumentation amplifier app lies common-mode vo ltage rejection and presents high input impedance to the AI signals connected to the NI 783 x R.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-6 ni.com T ypes of Signal Sources When configuring t he input channels and m aking signal co nnections, you must first det ermine whether the signal sources are fl oating or ground referenced.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-7 NI 783xR User Manual Figure 2-4. Summary of Analog Input Connections + – + – V 1 AI< i > AISENSE AIGND< i > + – + – V 1 AI< i > AISENSE AIGND< i > See text f or information on bias resistors.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-8 ni.com Differential Connection Consid erations (DIFF Input Mode) In DIFF input mode, the NI 783 x R measures the difference between the positive and negativ e inputs. DIFF inpu t mode is ideal for measuring ground-referenced signals from other devices.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-9 NI 783xR User Manual Figure 2-5. Differential Input Connections for Ground-Referenced Signals W ith this connect.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-10 ni.com Figure 2-6. Differential Input Connections for Nonreferenced Signals Figure 2-6 shows two bias resistors connected in parallel with the signal leads of a floating signal source.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-11 NI 783xR User Manual Y ou can fully balance the signal path by connecting another resistor of the same value between the positi ve input and AIGND, as shown in Figure 2 -6.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-12 ni.com In single-ended input modes, electrostatic and magn etic noise couples into the signal connection s more than in differential input modes. The couplin g is the result of dif ferences in the signal path.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-13 NI 783xR User Manual positive and negativ e inputs of the inst rumentation ampli fier.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-14 ni.com Analog Output The bipolar output range of the NI 783 x R A O channels is fixed at ± 10 V . Some applications require that the A O channels power on to kno wn voltage lev els.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-15 NI 783xR User Manual Figure 2-9. An alog Output Connections Digital I/O You can configure the NI 783 x R DIO lines individually for either input or output. When the syst em powers on, the DIO lines are high im pedance.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-16 ni.com (3.3 V TTL), the D IO lines cannot drive 5 V CMOS logic levels. T o interf ace to 5 V CMOS de vices, you mu st provide an e xternal pull-up resistor to 5 V . This resistor pulls up the 3.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-17 NI 783xR User Manual Figure 2-10. Example Digital I/O Connections Figure 2-10 shows DIO<0..3> configured for digital input and DIO<4..7> configured for digital ou tput.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-18 ni.com signals or non-edge-sensitiv e, low-fre quenc y digital signals. Exampl es of high-frequency or edge-sensitiv e signals include clock, trigger , pulse-width modulation (PWM), encoder , and counter signals.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-19 NI 783xR User Manual Caution Do not dri v e the same R TSI tr igger bus line with the NI 783 x R and another device simultaneously . Such sign al dri ving can damage both devices.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-20 ni.com delay-matched trigger signal between the fi rst peripheral slot and the other peripheral slots for precise tr igger timing signals. For example, an NI PXI-783 x R in Slot 2 can send an independent trigger signal to each device plugged into Slots <3.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-21 NI 783xR User Manual Figure 2-11. Switch Location on the NI PXI-783 x R SW1, SW2, SW3.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-22 ni.com Figure 2-12. Switch Location on the NI PCI-783 x R Figure 2-13. Switch Settings Complete the following steps to prevent a VI stored in Flash me mory from loading to the FPGA: 1.
Chapte r 2 Hardware Ov erview of the N I 783x R © National Instruments Corporation 2-23 NI 783xR User Manual 4. Reinsert the NI 783 x R into the PXI/CompactPCI chassis or PCI computer . Refer to the Installing the Hardware section of the Getting Started with the NI 783 x R docum ent for installat ion instruction s.
Chapter 2 Hardware Overview of the NI 783x R NI 783xR User Manual 2-24 ni.com Field Wiring Considerations Environmental noise can se riously affect the meas urement accuracy of the device if you do not take proper care when running signal wires bet ween signal sources and the device.
© National Instruments Corporation 3-1 NI 783xR User Manual 3 Calibration Calibration is the process of determin ing and/or adjusting the accuracy of an instrument to m inimize measurement an d output voltage errors. On the NI 783 x R, onboard calibration DACs (C alDA Cs) correct these errors.
Chapter 3 Calibr ation NI 783xR User Manual 3-2 ni.com If you have NI-RIO installed, you can find the internal calibration utility at Start»All Programs»National Instruments»NI-RIO» device »Cali brate 783 x R Device . Device is the NI PXI-783 x R or NI PCI-783 x R device.
© National Instruments Corporation A- 1 NI 783xR User Manual A Specifications This appendix lists the specifications of the NI 783 x R. These specifications are typical at 25 °C unless otherwise noted. Analog Input Input Characteristics Number of channels NI 7830R .
Appendix A Specifications NI 783xR User Manual A-2 ni.com Maximum working voltage (signal + common mode) ............ ........... .Inputs should remain within ± 12 V of ground Overvoltage protection ............ .............. .± 42 V Data transfers .
Appendix A Specifications © National Instruments Corporation A- 3 NI 783xR User Manual Settling T ime Crosstalk.............. .............. .............. ....... –80 dB, DC to 100 kHz Analog Output Output Characteristics Output type .............
Appendix A Specifications NI 783xR User Manual A-4 ni.com Accuracy Information DC T ransfer Characteristics INL ............... .............. .............. .............. .± 0.5 LSB t yp, ± 4.0 LSB max DNL ............. .............. ........... .
Appendix A Specifications © National Instruments Corporation A- 5 NI 783xR User Manual Slew rate .................... .............. .............. . 10 V/ µ s Noise .............. .............. .............. ............ 1 50 µ V rms , DC to 1 MHz Glitch energy at midscale transition .
Appendix A Specifications NI 783xR User Manual A-6 ni.com Reconfigurable FPGA Number of logic slices NI 7 830R ......... ............................ ....5,120 NI 7 831R ......... ............................ ....5,120 NI 7 833R ............ .........
Appendix A Specifications © National Instruments Corporation A- 7 NI 783xR User Manual Onboard calibration reference DC level ................... .............. ......... 5.000 V ( ± 3.5 mV ) (actual value stored in Flash memory) Temperature coefficient .
Appendix A Specifications NI 783xR User Manual A-8 ni.com Physical Dimensions (not inclu ding connectors) NI PXI-783 x R ................ .............. ....16 cm by 10 cm (6.3 in. b y 3.9 in.) NI PCI-783 x R ................... .............. .17 cm by 11 cm (6.
Appendix A Specifications © National Instruments Corporation A- 9 NI 783xR User Manual Relative humidity range ................ ......... 10% to 90%, noncondensing, tested in accordance with IEC-60068-2-56 Altitude................... .............. .
Appendix A Specifications NI 783xR User Manual A-10 ni.com Safety The NI 783 x R is designed to meet the requiremen ts of the following standards of safety for electrical e quipment for measurement, control, and laboratory use: • IEC 61010-1, EN 61010-1 • UL 61010-1 • CAN/CSA-C22.
© National Instruments Corporation B- 1 NI 783xR User Manual B Connecting I/O Signals This appendix describes how to make input and output signal connections to the NI 783 x R I/O connectors. Figure B -1 shows the I/O connector locations for th e NI PXI-78 31R/7833R and the NI PCI-7 831R/7833R.
Appendix B Connecting I/O Signals NI 783xR User Manual B-2 ni.com Figure B -2 sho ws the I/O connector pin assignments for the I/O connectors on the NI 783 x R. The DIO connector pin assi gnment applies to connector 1 on the NI 7830R and connectors <1.
Appendix B Connecting I/O Signals © National Instruments Corporation B- 3 NI 783xR User Manual . Caution Connections that exceed any of the maximum ratings of input or output si gnals on the NI 783 x R can damage the NI 783 x R and the computer . Maximum input ratings for each signal are in the Protection colu mn of T abl e B-2.
Appendix B Connecting I/O Signals NI 783xR User Manual B-4 ni.com Connecting to CompactRIO Extension I/O Chassis Y ou can use the CompactRIO R Series Expansion chassis and CompactRIO I/O modules with the NI 783 x R.
Appendix B Connecting I/O Signals © National Instruments Corporation B- 5 NI 783xR User Manual Connecting to 5B and SSR Signal Conditioning NI provides cables that allow you to connect signals from the NI 783 x R directly to 5B backplanes for analog signal conditio ning and SSR backplanes for digital signal conditioning .
Appendix B Connecting I/O Signals NI 783xR User Manual B-6 ni.com Figure B-3. Connector Pinouts when Using NSC68-262650 Cable The NSC68-5050 cable connects th e signals on the NI 783 x R DIO connectors directly to SSR backplanes for digital signal cond itioning.
Appendix B Connecting I/O Signals © National Instruments Corporation B- 7 NI 783xR User Manual NSC68-5050 cable header . In this case, you ha ve a ccess only to the channels that exist on both the SSR backplane and the N SC68-5050 cable header you are using.
© National Instruments Corporation C- 1 NI 783xR User Manual C Using the SCB-68 Shielded Connector Block This appendix describes how to connect input and output signals to the NI 783 x R with the SCB-68 shie lded connector block. The SCB-68 has 68 screw terminals for I/O signal connections.
© National Instruments Corporation D-1 NI 783xR User Manual D T echnical Support and Professional Ser vices Visit the following sections of the National Instruments Web site at ni.com for technical support an d professional services: • Support —Online technical support resources at ni.
Appendix D T echni cal Support and Profess ional Ser vices NI 783xR User Manual D -2 ni.com • Calibration Certificate —If your product supports calibration, you can obtain the calibration certificate for your product at ni.com/calibration . If you searched ni.
© National Instruments Corporation G-1 NI 783xR User Manual Glossar y Symbol Pref ix V alue pp i c o 1 0 –1 2 nn a n o 1 0 –9 µ micro 10 –6 m milli 10 –3 k kilo 10 3 Mm e g a 1 0 6 Gg i g a 1 0 9 Numbers/Symbols ° Degrees. > Greater than.
Glossary NI 783xR User Manual G-2 © National Instruments Corporation Square root of. +5V +5 VDC source signal. A A Amperes. A/D Analog-to-digital . A C Alternating curren t. ADC Analog-to-digital con verter—An elect ronic de vice, often an integrated circuit, that con verts an an alog voltage to a digital number .
Glossary © National Instruments Corporation G-3 NI 783xR User Manual C CC e l s i u s . CalD A C Calibration D A C. CH Channel—Pin or wire lead to wh ich you apply or from which you read the analog or digital signal. Anal og signals can be single-ended or differential.
Glossary NI 783xR User Manual G-4 © National Instruments Corporation DIO Digital input /output. DIO< i > Digital input/ou tput channel signal. DMA 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.
Glossary © National Instruments Corporation G-5 NI 783xR User Manual I I/O Input/output—The transfer of data to/from a computer sy stem in volving communications channels, operator interface de vices, and/or data acquisition and control interfaces.
Glossary NI 783xR User Manual G-6 © National Instruments Corporation N noise An undesirable electrical signal—Nois e comes from external sources such as the A C power line, motors, generators, tran.
Glossary © National Instruments Corporation G-7 NI 783xR User Manual R RAM 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. V arious types of RA M are DRAM, EDO RAM, SRAM, and VRAM.
Glossary NI 783xR User Manual G-8 © National Instruments Corporation T THD T otal harmonic distortion—The rati o of the total rms signal due to harmonic distortion to the overall rms signal, in decibel or a percentage. thermocouple A temperature se nsor created by joining tw o dissim ilar metals.
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