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SCXI-1120
User Manual
Eight-Channel Isolated Analog Input Module for Signal Conditioning
August 1994 Edition
Part Number 320425B-01
© Copyright 1992, 1994 National Instruments Corporation.
All Rights Reserved.
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National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin, TX 78730-5039 (512) 794-0100 Technical support fax: (800) 328-2203 (512) 794-5678 Branch Offices: Australia (03) 879 9422, Austria (0662) 435986, Belgium 02/757.00.20, Canada (Ontario) (519) 622-9310, Canada (Québec) (514) 694-8521, Denmark 45 76 26 00, Finland (90) 527 2321, France (1) 48 14 24 24, Germany 089/741 31 30, Italy 02/48301892, Japan (03) 3788-1921, Netherlands 03480-33466, Norway 32-848400, Spain (91) 640
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Limited Warranty The SCXI-1120 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. A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before any equ
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Contents About This Manual xi ............................................................................................................. Organization of This Manual xi ......................................................................................... Conventions Used in This Manual xii ................................................................................. Related Docum
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Contents Digital I/O Signal Connections 2-26 .............................................................. Timing Requirements and Communication Protocol 2-28 ............................. Timing Signal 2-28 ............................................................................. Communication Signals 2-28 ......................................................................... Chapter 3 Theory of Operation 3-1 ..............................................................................
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Contents Single-Channel Measurements 5-3 .......................................................................... Direct Measurements 5-3 ............................................................................. Parallel Output 5-3 ........................................................................... Multiplexed Output 5-4 .................................................................... Indirect Measurements 5-4 ....................................................................
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Contents Appendix E SCXI-1120 Cabling E-1 ............................................................................................................. SCXI-1340 Cable Assembly E-1 .......................................................................................... SCXI-1340 Installation E-2 ...................................................................................... SCXI-1341 Lab-NB, Lab-PC, or Lab-PC+ and SCXI-1344 Lab-LC Cable Assembly E-3 .....................................
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Contents Figures Figure 2-1. SCXI-1120 General Parts Locator Diagram 2-2 ...................................................... Figure 2-2. Detailed Parts Locator Diagram 2-3 ......................................................................... Figure 2-3. SCXI-1120 Front Connector Pin Assignment 2-12 ................................................... Figure 2-4. Ground-Referenced Signal Connection with High Common-Mode Voltage 2-14 .... Figure 2-5. Floating Signal Connection Referenced to
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Contents Tables Table 2-1. Digital Signal Connections, Jumper Settings 2-6 ..................................................... Table 2-2. Jumper W46 Settings 2-8 ......................................................................................... Table 2-3. Jumper W41 Settings 2-9 ......................................................................................... Table 2-4. Gain Jumper Allocation 2-9 ...................................................................................
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About This Manual This manual describes the electrical and mechanical aspects of the SCXI-1120 and contains information concerning its operation and programming. The SCXI-1120 is a class I module that operates as eight isolated input channels. Refer to your chassis manual for a description of the different module classes. Each channel is isolated and independently configurable via jumpe
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About This Manual • Appendix D, SCXI-1120 Front Connector, describes the pinout and signal names for the SCXI-1120 front connector, including a description of each connection. • Appendix E, SCXI-1120 Cabling, describes how to use and install the hardware accessories for the SCXI-1120. • Appendix F, Revision A and B Photo and Parts Locator Diagrams, contains a photograph of the Revision A and B SCXI-1120 signal conditioning module and the general and detailed parts locator diagrams. • Appendix G,
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About This Manual SCXIbus descriptor may be omitted when the meaning is clear. Descriptions of all SCXIbus signals are given in Appendix C, SCXIbus Connector. Slot 0 Slot 0 refers to the power supply and control circuitry in the SCXI chassis. Abbreviations, acronyms, metric prefixes, mnemonics, symbols, and terms are listed in the Glossary. Related Documentation The following documents contain information that you may find helpful as you read this manual: • Your DAQ board user manual • Your SCXI
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Chapter 1 Introduction This chapter describes the SCXI-1120; lists the contents of your SCXI-1120 kit; describes the optional software, optional equipment, and custom cables; and explains how to unpack the SCXI-1120 kit. The SCXI-1120 is a class I module consisting of eight isolated input channels. The SCXI-1120 is a module for signal conditioning of thermocouples, volt sources, millivolt
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Introduction Chapter 1 What Your Kit Should Contain The contents of the SCXI-1120 kit (part number 776572-20) are listed as follows. Kit Component Part Number SCXI-1120 module 181695-01 SCXI-1120 User Manual 320425-01 If your kit is missing any of the components, contact National Instruments. Optional Software This manual contains complete instructions for directly programming the SCXI-1120. You can order separate software packages for controlling the SCXI-1120 from National Instruments. Wh
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Chapter 1 Introduction You can also use the SCXI-1120, combined with the NB Series data acquisition boards, with NI-DAQ software for Macintosh. NI-DAQ software for Macintosh, which is shipped with all National Instruments Macintosh data acquisition boards, comes with language interfaces for MPW C, THINK C, Pascal, and Microsoft QuickBASIC. Any language that uses Device Manager Toolbox calls can access NI-DAQ software for Macintosh. Optional Equipment Equipment Part Number SCXI-1320 front termi
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Introduction Chapter 1 Custom Cables The SCXI-1120 rear signal connector is a 50-pin male ribbon-cable header. The manufacturer part number used by National Instruments for this header is as follows: • AMP Inc. (part number 1-103310-0) The mating connector for the SCXI-1120 rear signal connector is a 50-position polarized ribbon-socket connector with strain relief. National Instruments uses a polarized or keyed connector to prevent inadvertent upside-down connection to the SCXI-1120. Recommen
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Chapter 2 Configuration and Installation This chapter describes the SCXI-1120 jumper configurations, installation of the SCXI-1120 into the SCXI chassis, signal connections to the SCXI-1120, and cable wiring. Module Configuration The SCXI-1120 includes 46 jumpers that are shown in the parts locator diagrams in Figures 2-1 and 2-2. © National Instruments Corporation 2-1 SCXI-1120 User Manua
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Configuration and Installation Chapter 2 Figure 2-1. SCXI-1120 General Parts Locator Diagram SCXI-1120 User Manual 2-2 © National Instruments Corporation
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Chapter 2 Configuration and Installation Figure 2-2 shows a detailed parts locator diagram of the SCXI-1120. Figure 2-2. Detailed Parts Locator Diagram © National Instruments Corporation 2-3 SCXI-1120 User Manual
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Configuration and Installation Chapter 2 The jumpers are used as follows: • Fixed jumpers - On Revision A and B modules, jumper W42 is unused and should not be connected. - Jumper W45 is reserved and should not be reconfigured. - On Revision A and B modules, jumper W44 carries the SLOT0SEL* signal from the rear signal connector, after buffering, to the SCXIbus INTR* line and should be left in the factory-default position (position 1). On Revision C and later modules, jumper W44 does not exist.
