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TM
SCXI -1122
User Manual
Sixteen-Channel Isolated Transducer Multiplexer Module for Signal
Conditioning
September 1999 Edition
Part Number 320516B-01
© Copyright 1993, 1999 National Instruments Corporation.
All Rights Reserved.
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Worldwide Technical Support and Product Information www.natinst.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 794 0100 Worldwide Offices Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Brazil 011 284 5011, Canada (Calgary) 403 274 9391, Canada (Ontario) 905 785 0085, Canada (Québec) 514 694 8521, China 0755 3904939, Denmark 45 76 26 00, Finland 09 725 725 11, France 01 48 14 24 24, Greece 30 1 42 96 427
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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 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 equipmen
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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
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Contents About This Manual ix ............................................................................................................. Organization of This Manual ix ......................................................................................... Conventions Used in This Manual x ................................................................................. The National In
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Contents Chapter 5 Calibration 5-1 ............................................................................................................................. Overview 5-1 ........................................................................................................................ Calibration Procedure 5-1 .................................................................................................... Calibration Equipment Requirements 5-1 .......................................
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Contents Figures Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your Hardware 1-3 ................................................................................................... Figure 2-1. SCXI-1122 Parts Locator Diagram 2-2 .................................................................... Figure 3-1. SCXI-1122 Front Connector Pin Assignments 3-3 .................................................. Figure 3-2. Ground-Referenced Signal Connection with High Com
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About This Manual This manual describes the electrical and mechanical aspects of the SCXI-1122 and contains information concerning its operation. The SCXI-1122 is a member of the National Instruments Signal Conditioning eXtensions for Instrumentation (SCXI) Series for the National Instruments DAQ plug-in boards. This module is designed for signal cond itioning of strain gauges, RT
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About This Manual Conventions Used in This Manual The following conventions are used in this manual. ! This symbol refers to a caution that must be taken when operating this equipment. This symbol is found on the equipment and near the explanation of the caution in the manual. bold italic Bold italic text denotes a note, caution, or warning. italic Italic text denotes emphasis, a cross reference, or an introduction to a key concept. Lab board Lab board refers to the Lab-LC, Lab-NB, Lab-PC, and
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About This Manual The National Instruments Documentation Set The SCXI-1122 User Manual is one piece of the documentation set for your SCXI system. You should have six types of manuals. Use these different types of manuals as follows: • Getting Started with SCXI–This is the first manual you should read. It gives an overview of the SCXI system and contains the most commonly needed information for the modules, chassis, and software. • Your SCXI module user manuals–These manuals contain detailed
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About This Manual Customer Communication National Instruments wants to receive your comments on our products and manuals. We are interested in the applications you develop with our products, and we want to help if you have problems with them. To make it easy for you to contact us, this manual contains comment and configuration forms for you to complete. These forms are in Appendix B, Customer Communication, at the end of this manual. SCXI-1122 User Manual xii © National Instruments Corporatio
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Chapter 1 Introduction This chapter describes the SCXI-1122; lists the contents of your SCXI-1122 kit; describes the optional software, optional equipment, and custom cables; and explains how to unpack the SCXI-1122. The SCXI-1122 has 16 isolated input channels and two isolated excitation channels. The SCXI-1122 is a module for signal conditioning of strain gauges, RTDs, thermistors, ther
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Introduction Chapter 1 Software Programming Choices There are four options to choose from when programming your National Instruments plug-in DAQ board and SCXI hardware. You can use LabVIEW, LabWindows, NI-DAQ, or register- level programming software. LabVIEW and LabWindows Application Software LabVIEW and LabWindows are innovative program development software packages for data acquisition and control applications. LabVIEW uses graphical programming, whereas LabWindows enhances traditional pro
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Chapter 1 Introduction NI-DAQ also internally addresses many of the complex issues between the computer and the plug-in board such as programming interrupts and DMA controllers. NI-DAQ maintains a consistent software interface among its different versions so that you can change platforms with minimal modifications to your code. Figure 1-1 illustrates the relationship between NI-DAQ and LabVIEW and LabWindows. You can see that the data acquisition parts of LabVIEW and LabWindows are functional
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Introduction Chapter 1 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 and inefficient, and is not recommended for most users. The only users who should consider writing register-level software should meet at least one of the following criteria: • National Instruments does not support your operating system or programming language. • You
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Chapter 1 Introduction Custom Cables The SCXI-1122 rear signal connector is a 50-pin male ribbon-cable header. The manufacturer part number that National Instruments uses for this header is as follows: • AMP Inc. (part number 1-103310-0) The mating connector for the SCXI-1122 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-1122. Recomm
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Chapter 2 Configuration and Installation This chapter describes how to configure the SCXI-1122 jumpers and how to install the SCXI-1122 into the SCXI chassis. Module Configuration The SCXI-1122 contains two jumpers that are shown in the parts locator diagram in Figure 2-1. Jumper W2 connects a pullup resistor to the SERDATOUT signal on the rear signal connector. Jumper W1 configures the gu
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Configuration and Installation Chapter 2 Figure 2-1. SCXI-1122 Parts Locator Diagram SCXI-1122 User Manual 2-2 © National Instruments Corporation
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Chapter 2 Configuration and Installation 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 between the DAQ board and the SCXIbus, shown in Table 2-1. Table 2-1. Digital Signal Connection Jumper Settings Jumper Description Configuration DAQ board to Position 1 (pullup)–Use this setting SCXIbus for a single-chassis system. communication Connects a 2.2 kW
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Configuration and Installation Chapter 2 Table 2-2. Jumper W1 Settings Jumper Description Configuration Grounding, Unconnected position (factory setting) B shielding, and A reference mode R0 R1 R2 selection Connects the analog reference to the B analog output ground AOGND (pins 1 A and 2 on the rear signal connector). R0 R1 R2 Select this configuration if you are using an RSE DAQ board. Do not use a differential input DAQ board when jumper W1 is in this position. Connects SCXIbus guard t
