National Instruments SCXI -1122 - Manuals

Page 3 - Warranty; Copyright

Warranty The SCXI-1122 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 ...

Page 4 - WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS

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 ...

Page 5 - Contents; About This Manual; ix

© National Instruments Corporation v SCXI-1122 User Manual Contents About This Manual ............................................................................................................. ix Organization of This Manual ............................................................................

Page 6 - Glossary

Contents SCXI-1122 User Manual vi © National Instruments Corporation Chapter 5Calibration ............................................................................................................................. 5-1 Overview ..........................................................................

Page 7 - Figures

Contents © National Instruments Corporation vii SCXI-1122 User Manual Figures Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your Hardware ................................................................................................... 1-3 Figure 2-1. SCXI-1122 Part...

Page 8 - Organization of This Manual; The SCXI-1122 User Manual is organized as follows:

© National Instruments Corporation ix SCXI-1122 User Manual About This Manual This manual describes the electrical and mechanical aspects of the SCXI -1122 and containsinformation concerning its operation. The SCXI -1122 is a member of the National InstrumentsSignal Conditioning eXtensions for Instr...

Page 9 - Conventions Used in This Manual; bold italic

About This Manual SCXI-1122 User Manual x © National Instruments Corporation Conventions Used in This Manual The following conventions are used in this manual. bold italic Bold italic text denotes a note, caution, or warning. italic Italic text denotes emphasis, a cross reference, or an introduction...

Page 10 - The National Instruments Documentation Set; you should not need the register-level programmer manual. Using

About This Manual © National Instruments Corporation xi SCXI-1122 User Manual The National Instruments Documentation Set The SCXI-1122 User Manual is one piece of the documentation set for your SCXI system. Youshould have six types of manuals. Use these different types of manuals as follows: • Getti...

Page 11 - Customer Communication

About This Manual SCXI-1122 User Manual xii © National Instruments Corporation Customer Communication National Instruments wants to receive your comments on our products and manuals. We areinterested in the applications you develop with our products, and we want to help if you haveproblems with them...

Page 12 - What Your Kit Should Contain; Kit Component

© National Instruments Corporation 1-1 SCXI-1122 User Manual Chapter 1Introduction This chapter describes the SCXI-1122; lists the contents of your SCXI-1122 kit; describes theoptional software, optional equipment, and custom cables; and explains how to unpack theSCXI-1122. The SCXI-1122 has 16 isol...

Page 13 - Software Programming Choices; LabVIEW and LabWindows Application Software; Software; LabVIEW for Windows; NI-DAQ Driver Software

Introduction Chapter 1 SCXI-1122 User Manual 1-2 © National Instruments Corporation Software Programming Choices There are four options to choose from when programming your National Instruments plug-inDAQ board and SCXI hardware. You can use LabVIEW, LabWindows, NI-DAQ, or register-level programming...

Page 14 - Figure 1-1. The Relationship between the Programming Environment,

Chapter 1 Introduction © National Instruments Corporation 1-3 SCXI-1122 User Manual NI-DAQ also internally addresses many of the complex issues between the computer and theplug-in board such as programming interrupts and DMA controllers. NI-DAQ maintains aconsistent software interface among its diff...

Page 15 - Register-Level Programming; Optional Equipment; Equipment; SCXI-1322 front terminal block

Introduction Chapter 1 SCXI-1122 User Manual 1-4 © National Instruments Corporation Register-Level Programming The final option for programming any National Instruments DAQ hardware is to write register-level software. Writing register-level programming software can be very time consuming andineffic...

Page 16 - Custom Cables; Unpacking; Never touch the exposed pins of connectors.

Chapter 1 Introduction © National Instruments Corporation 1-5 SCXI-1122 User Manual Custom Cables The SCXI-1122 rear signal connector is a 50-pin male ribbon-cable header. The manufacturerpart number that National Instruments uses for this header is as follows: • AMP Inc. (part number 1-103310-0) Th...

Page 17 - Module Configuration

© National Instruments Corporation 2-1 SCXI-1122 User Manual Chapter 2Configuration and Installation This chapter describes how to configure the SCXI-1122 jumpers and how to install theSCXI-1122 into the SCXI chassis. Module Configuration The SCXI-1122 contains two jumpers that are shown in the part...

Page 19 - Digital Signal Connections; jumper W2 is irrelevant.; Jumper; pullup resistor to; Analog Configuration

Chapter 2 Configuration and Installation © National Instruments Corporation 2-3 SCXI-1122 User Manual Digital Signal Connections Note: If nothing is cabled to the SCXI-1122 rear signal connector, the position of jumper W2 is irrelevant. The SCXI-1122 has one jumper–jumper W2–for communication betwee...

Page 20 - reference mode

Configuration and Installation Chapter 2 SCXI-1122 User Manual 2-4 © National Instruments Corporation Table 2-2. Jumper W1 Settings Jumper Description Configuration Grounding, shielding, and reference mode selection Unconnected position (factory setting) W1 B A R0 R1 R2 Connects the analog reference...

Page 21 - Input Channel; –This unit should only be opened by qualified personnel aware of

Chapter 2 Configuration and Installation © National Instruments Corporation 2-5 SCXI-1122 User Manual Table 2-3. User-Defined Current Receiver Resistors (Continued) Input Channel Resistor Reference Designator 4 R5 5 R6 6 R7 7 R8 8 R9 9 R10 10 R11 11 R12 12 R13 13 R14 14 R17 15 R18 Warning: Before in...

Page 22 - Hardware Installation; your cable installation guide.

Configuration and Installation Chapter 2 SCXI-1122 User Manual 2-6 © National Instruments Corporation Hardware Installation You can install the SCXI-1122 in any available SCXI chassis slot. After you have made anynecessary changes and have verified and recorded the jumper settings on the form inAppe...

Page 24 - resulting from incorrect signal connections.

Signal Connections Chapter 3 SCXI-1122 User Manual 3-2 © National Instruments Corporation Connections, including power signals to ground and vice versa, that exceed anyof the maximum signal ratings on the SCXI-1122 can damage any or all of theboards connected to the SCXI chassis, the host computer, ...

Page 25 - Front Connector

Chapter 3 Signal Connections © National Instruments Corporation 3-3 SCXI-1122 User Manual Front Connector Figure 3-1 shows the pin assignments for the SCXI-1122 front connector. ! If a relay fails there exists a potential shock hazard on the inputs that are notin contact with hazardous voltages. For...

Page 26 - Front Signal Connection Descriptions; Pin; No Connect–Do not connect any signal to these pins.

Signal Connections Chapter 3 SCXI-1122 User Manual 3-4 © National Instruments Corporation Front Signal Connection Descriptions Pin Signal Name Description A1 TEMP- Temperature Sensor Reference–This pin is tied to thetemperature sensor reference in the terminal block and tothe isolation amplifier neg...

Page 27 - Analog Input Channel Signal Connections

Chapter 3 Signal Connections © National Instruments Corporation 3-5 SCXI-1122 User Manual The signals on the front connector are all analog except pins A7, and A31, which are digital. Theanalog signals are grouped into analog input channels, excitation channels, and temperaturesensor signals. Signal...

Page 28 - Figure 3-4. Floating AC-Coupled Signal Connection Referenced

Signal Connections Chapter 3 SCXI-1122 User Manual 3-6 © National Instruments Corporation Vs Vcm + - Figure 3-2. Ground-Referenced Signal Connection with High Common-Mode Voltage Vs + - Figure 3-3. Floating Signal Connection Referenced to Chassis Ground for Better SNR Vs R b C c + - Figure 3-4. Floa...

Page 30 - Single -Sample Channel Scanning; Excitation Channel Signal Connections; liable for any damages or injuries resulting from such signal

Signal Connections Chapter 3 SCXI-1122 User Manual 3-8 © National Instruments Corporation Scanned 100 times CH0 (one sample) CH1 (one sample) CH2 (one sample) CH3 (one sample) No 100 Scans Done? Yes average the samples for each channel CH0 x 100 samples CH1 x 100 samples CH2 x 100 samples CH3 x 100 ...

Page 31 - Table 3-1. Maximum Load per Excitation Channel; Excitation Level; Using the Internal Half-Bridge Completion; Figure 3-7. Connecting a Quarter-Bridge Strain Gauge to Channel 0; Temperature Sensor Connection; liable for any damages resulting from such signal connections.

Chapter 3 Signal Connections © National Instruments Corporation 3-9 SCXI-1122 User Manual Table 3-1. Maximum Load per Excitation Channel Excitation Level Maximum Load 3.333 V 225 mA 1 mA 5 k Ω Using the Internal Half-Bridge Completion Your SCXI-1122 includes half-bridge completion for half-bridge an...

Page 32 - Rear Signal Connector

Signal Connections Chapter 3 SCXI-1122 User Manual 3-10 © National Instruments Corporation Rear Signal Connector Note: If you are using the SCXI-1122 with a National Instruments DAQ board and cable assembly, you do not need to read the remainder of this chapter. If you are using theSCXI-1180 feedthr...

Page 33 - Rear Signal Connection Descriptions

Chapter 3 Signal Connections © National Instruments Corporation 3-11 SCXI-1122 User Manual Rear Signal Connection Descriptions Pin Signal Name Description 1, 2 AOGND Analog Output Ground–These pins are connected to theanalog reference when jumper W1 is in position AB-R0. 3, 4 MCH0 ± Analog Output Ch...

Page 34 - Digital I/O Signal Connections; tied to the module digital ground.

Signal Connections Chapter 3 SCXI-1122 User Manual 3-12 © National Instruments Corporation In particular, when using differential input DAQ boards such as the MIO-16 boards, it ispreferable to leave jumper W1 in its factory setting or in position AB-R1 to avoid ground loops.With DAQ boards that are ...

Page 35 - SCXIbus Line

Chapter 3 Signal Connections © National Instruments Corporation 3-13 SCXI-1122 User Manual Table 3-2. SCXIbus to SCXI-1122 Rear Signal Connector to DAQ Board Pin Equivalences SCXIbus Line SCXI-1122 Rear Signal Connector MIO-16 Lab Boards PC-LPM-16 MOSI SERDATIN ADIO0 PB4 DOUT4 D*/A DAQD*/A ADIO1 PB5...

Page 36 - Functional Overview

© National Instruments Corporation 4-1 SCXI-1122 User Manual Chapter 4Theory of Operation This chapter contains a functional overview of the SCXI-1122 module and explains the operationof each functional unit making up the SCXI-1122. Functional Overview The block diagram in Figure 4-1 illustrates the...

Page 38 - Rear Signal Connector, SCXIbus Connector, and SCXIbus Interface; Analog Input Channels

Chapter 4 Theory of Operation © National Instruments Corporation 4-3 SCXI-1122 User Manual The major components of the SCXI-1122 are as follows: • The rear signal connector • The SCXIbus connector • The SCXIbus interface • The digital control circuitry • The analog circuitry The SCXI-1122 consists o...

Page 39 - Sense

Theory of Operation Chapter 4 SCXI-1122 User Manual 4-4 © National Instruments Corporation banks which switch synchronously. The eight upper channels (0 through 7) operate as voltagesense channels and one out of eight is connected to the amplifier at any given point in time. Inaddition, the eight lo...

Page 40 - Excitation Output Channels

Chapter 4 Theory of Operation © National Instruments Corporation 4-5 SCXI-1122 User Manual Excitation Output Channels In addition to the isolated input channels, the SCXI-1122 has isolated excitation channels, one3.333 V voltage output source and one 1 mA current output source. Both–like the relay i...

Page 41 - . If you connect loads greater than 5 k

Theory of Operation Chapter 4 SCXI-1122 User Manual 4-6 © National Instruments Corporation gauge resistor–to complete the bridge network. Connect this resistor in your SCXI-1322terminal block between the CH+ and VEX- terminals. The current output channel is provided for transducers–such as thermisto...

Page 42 - Type

Chapter 4 Theory of Operation © National Instruments Corporation 4-7 SCXI-1122 User Manual Note: Always connect the current excitation terminals outside the sense terminals as shown in both Figures 4-2 and 4-3. Each approach has its advantages and disadvantages as listed in Table 4-2. Table 4-2. Pro...

Page 43 - Overview; Calibration Equipment Requirements; Accuracy

© National Instruments Corporation 5-1 SCXI-1122 User Manual Chapter 5Calibration This chapter discusses the calibration procedures for the SCXI-1122. Overview The onboard calibration hardware that calibrates the SCXI-1122, consists of an EEPROM tostore the calibration constants and an auto-zero cha...

Page 44 - Gain and Offset Calibration

Calibration Chapter 5 SCXI-1122 User Manual 5-2 © National Instruments Corporation - Resolution 8 1 / 2 digits • For the excitation channels, you need a voltmeter with the following specifications: - Accuracy ± 0.004% standard ± 0.16% sufficient - Range 0 to +5 V - Resolution 5 1 / 2 digits • You ne...

Page 45 - to the amplifier input.; units as given by the following formula:; function or VI as described in your software user manual.

Chapter 5 Calibration © National Instruments Corporation 5-3 SCXI-1122 User Manual • To select positive and negative full scale to be the two calibration points, apply -9.9 V/G s and 9.9 V/G s. . a. Apply -9.9 V/G s to the amplifier input. b. Measure the input voltage with the DMM and store the meas...

Page 46 - Excitation Calibration; excitation errors do not exceed the ranges listed in Table 5-1.; Error Type

Calibration Chapter 5 SCXI-1122 User Manual 5-4 © National Instruments Corporation Excitation Calibration When using the excitation channels, you must retrieve the correction factors for the current andvoltage from the EEPROM before using them in your transducer conversion formulas. Refer toyour sof...

Page 47 - C unless; Analog Input; Module Gain Max; Overvoltage protection 250 Vrms powered on, 250 V powered off

© National Instruments Corporation A-1 SCXI-1122 User Manual Appendix ASpecifications This appendix lists the specifications for the SCXI-1122. These are typical at 25 ° C unless otherwise stated. Analog Input Input CharacteristicsNumber of channels 16 differential, 8 4-wire, software selectableInpu...

Page 48 - Filter Bandwidth

Specifications Appendix A SCXI-1122 User Manual A-2 © National Instruments Corporation Transfer CharacteristicsNonlinearity 0.01% FSR Offset error Gain ≥ 1 ± (6 µ V + 1,240 µ V/gain) Gain < 1 ± (352 µ V + 1,240 µ V/gain) Gain error Gain ≥ 1 ± 0.02% of reading Gain < 1 ± 0.10% of reading Amplif...

Page 49 - Excitation

° Appendix A Specifications © National Instruments Corporation A-3 SCXI-1122 User Manual Excitation Output CharacteristicsChannels 2 (1 voltage and 1 current) Bridge type Quarter, half, or full Bridge completion Two 2.5 k Ω ± 0.02% ratio tolerance resistors Voltage ModeLevel 3.333 V ± 0.04% Current ...

Page 50 - Branch Offices

© National Instruments Corporation B-1 SCXI-1122 User Manual Appendix BCustomer Communication For your convenience, this appendix contains forms to help you gather the information necessaryto help us solve technical problems you might have as well as a form you can use to comment onthe product docum...

Page 51 - Technical Support Form

Technical Support Form ___________________________________________________ Photocopy this form and update it each time you make changes to your software or hardware, and use the completedcopy of this form as a reference for your current configuration. Completing this form accurately before contactin...

Page 52 - SCXI-1122 Hardware Configuration Form

SCXI-1122 Hardware Configuration Form Record the settings and revisions of your hardware and software on the line to the right of each item. Complete anew copy of this form each time you revise your software or hardware configuration, and use this form as areference for your current configuration. C...

Page 54 - Documentation Comment Form

Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. Thisinformation helps us provide quality products to meet your needs. Title: SCXI-1122 User Manual Edition Date: September 1999 Part Number: 320516B-01 Please comment on the com...

Page 55 - Prefix

© National Instruments Corporation Glossary-1 SCXI-1122 User Manual Glossary Prefix Meaning Value p- pico- 10 -12 n- nano- 10 -9 µ - micro- 10 -6 m- milli- 10 -3 k- kilo- 10 3 M- mega- 10 6 Numbers/Symbols ˚ degrees ε strain > greater than ≥ greater than or equal to < less than - negative of, ...

Page 59 - Index; Numbers

© National Instruments Corporation Index- 1 SCXI-1122 User Manual Index Numbers +5 V signal, 3-4 A AC-coupled signal connection with high common-mode voltage (illustration), 3-7 Address Handler Register, 4-3analog circuitry, 4-3 to 4-7 analog input channels, 4-3excitation output channels, 4-3 to 4-7...

Page 62 - floating signal connection referenced

Index SCXI-1122 User Manual Index- 4 © National Instruments Corporation ground for better SNR(illustration), 3-6 floating signal connection referenced to chassis ground for better SNR(illustration), 3-6 ground-referenced signal connection with high common-mode voltage(illustration), 3-6 pin assignme...