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VXI-SC-1102/B/C
User Manual
32-Channel Multiplexer Amplifier Submodules
August 1997 Edition
Part Number 321385B-01
© Copyright 1997 National Instruments Corporation. All rights reserved.
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Internet Support support@natinst.com E-mail: info@natinst.com FTP Site: ftp.natinst.com Web Address: http://www.natinst.com Bulletin Board Support BBS United States: (512) 794-5422 BBS United Kingdom: 01635 551422 BBS France: 01 48 65 15 59 Fax-on-Demand Support (512) 418-1111 Telephone Support (U.S.) Tel: (512) 795-8248 Fax: (512) 794-5678 International Offices Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Canada (Ontario) 905 785 0085, Canada (Québec) 514 694 8521, De
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Important Information Warranty The VXI-SC-1102,VXI-SC-1102B, and VXI-SC-1102C submodules are 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
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Table of Contents About This Manual Organization of This Manual........................................................................................ix Conventions Used in This Manual................................................................................x National Instruments Documentation ...........................................................................xi Related Documentation.................................................................................................xi
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Table of Contents Chapter 4 Theory of Operation Functional Overview .................................................................................................... 4-1 VXIbus Interface .......................................................................................................... 4-2 Digital Control Circuitry .............................................................................................. 4-2 Analog Circuitry..........................................................
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Table of Contents Figure 3-1. VXI-SC-1102/B/C Front Connector Pin Assignments..........................3-2 Figure 3-2. Ground-Referenced Signal Connection.................................................3-5 Figure 3-3. Floating Signal Connection Referenced to Chassis Ground..................3-6 Figure 4-1. VXI-SC-1102/B/C Block Diagram........................................................4-1 Figure 5-1. Analog Bus Receptacle Pin Assignment ...............................................5-2 Tab
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About This Manual This manual describes the electrical and mechanical aspects of the VXI-SC-1102 family and contains information concerning their installation and operation. The VXI-SC-1102 family is a group of signal conditioning submodules in the VXI-data acquisition (VXI-DAQ) line of National Instruments products. The VXI-SC-1102 family consists of the following submodules: • VXI-SC-1102 • VXI-SC-1102B • VXI-SC-1102C Unless otherwise noted, VXI-SC-1102/B/C will hereafter refer to all th
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About This Manual • Chapter 4, Theory of Operation, contains a functional overview of the VXI-SC-1102/B/C submodules and explains the operation of each functional unit. • Chapter 5, Calibration, discusses the calibration procedures for the VXI-SC-1102/B/C submodules. • Appendix A, Specifications, lists the specifications for the VXI-SC-1102/B/C submodules. • Appendix B, Calibration Sample Program, contains a sample program to help you calibrate your submodule. • Appendix C, Customer Communi
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About This Manual examples. This font is also used for the proper names of disk drives, paths, directories, programs, subprograms, subroutines, device names, functions, variables, file names, and extensions, and for statements and comments taken from program code. carrier module Refers to the VXI-SC-1000, which plugs directly into a VXI slot and on which VXI-SC submodules are installed. PC Refers to the IBM PC/XT, the IBM PC AT, and compatible computers. SCMP Refers to the signal conditionin
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About This Manual • Accessory installation guides or manuals—If you are using accessory products, read the terminal block and cable assembly installation guides or accessory device user manuals. They explain how to physically connect the relevant pieces of the system. Consult these guides when you are making your connections. Related Documentation The following document contains information you may find helpful: • VXI-SC-1000 Carrier Module Installation Guide Customer Communication National
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Chapter 1 Introduction This chapter describes the VXI-SC-1102 family of submodules; lists what you need to get started, optional software, and optional equipment; and explains how to unpack your VXI-SC-1102/B/C submodule. The VXI-SC-1102 family is part of the VXI signal conditioning system, which consists of a carrier module and one or more VXI signal conditioning submodules or filler panels as shown in Figure 1-1. 4 5 To VXIbus Chassis 3 6 2 7 8 1 9 1 Analog Bus Receptacle 4 Address Switch
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Chapter 1 Introduction The VXI-SC-1000 is a carrier module that installs into a slot in a VXIbus chassis and is populated with one or two submodules. The VXI-SC-1102/B/C is a submodule that installs into VXI-SC subslots on a VXI-SC-1000 carrier module. Your VXI-SC-1000 carrier module is shipped with a filler panel installed in one of the submodule sites. This filler panel is necessary for the attachment of the front panel, so you should leave it in place until you are ready to install a VX
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Chapter 1 Introduction The VXI-SC-1102/B/C submodules operate with full functionality with National Instruments VXI-MIO modules. You can multiplex several VXI-SC-1102/B/C submodules and other VXI signal conditioning submodules into a single channel on the VXI-MIO module, greatly increasing the number of analog input signals that you can digitize. You can also use National Instruments terminal blocks, which have screw terminals to which you attach the input signals for the VXI-SC-1102/B/C s
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Chapter 1 Introduction Software Programming Choices There are several options to choose from when programming your National Instruments VXI-DAQ hardware. You can use LabVIEW, LabWindows/CVI, ComponentWorks, VirtualBench, or other application development environments with either NI-DAQ or the VXIplug&play instrument driver. Both NI-DAQ and the VXIplug&play instrument driver access the VXI-DAQ hardware through the VISA driver software. National Instruments Application Software LabVIEW featur
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Chapter 1 Introduction NI-DAQ Driver Software The NI-DAQ driver software is included at no charge with all National Instruments DAQ hardware. NI-DAQ is not packaged with accessory products. NI-DAQ has an extensive library of functions that you can call from your application programming environment. These functions include routines for analog input (A/D conversion), buffered data acquisition (high-speed A/D conversion), analog output (D/A conversion), waveform generation, digital I/O, count
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Chapter 1 Introduction VXIplug&play Instrument Driver National Instruments distributes VXIplug&play instrument drivers free of charge. VXIplug&play instrument drivers are one level above the NI-DAQ device driver and contain high-level software functions whose architecture is specified by the VXIplug&play Systems Alliance. The VXIplug&play standards increase interoperability with other vendors, and ensure that drivers are designed and presented in a consistent fashion that facilitates ease
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Chapter 1 Introduction Unpacking Your VXI-SC-1102/B/C submodule is shipped in an antistatic package to prevent electrostatic damage to the submodule. Electrostatic discharge can damage several components on the submodule. To avoid such damage in handling the submodule, take the following precautions: • Ground yourself via a grounding strap or by holding a grounded object. • Touch the antistatic package to a metal part of your VXIbus chassis before removing the submodule from the package. •
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Chapter 2 Installation This chapter describes how to install current-loop receivers on your VXI-SC-1102/B/C and gives information about installing your VXI-SC-1102/B/C into the VXI-SC-1000 carrier module. Refer to Figure 2-1, VXI-SC-1102/B/C Parts Locator Diagram, for information as you read the instructions in this chapter. © National Instruments Corporation 2-1 VXI-SC-1102/B/C User Manual
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Chapter 2 Installation 2 3 1 4 1 Serial Number 2 Product Name 3 Assembly Number 4 RCLx Pads Figure 2-1. VXI-SC-1102/B/C Parts Locator Diagram VXI-SC-1102/B/C User Manual 2-2 © National Instruments Corporation
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Chapter 2 Installation Current-Loop Receivers The VXI-SC-1102/B/C submodules have pads for transforming individual channels to current-to-voltage converters. National Instruments offers an SCXI Process Current Resistor Kit of four 249 Ω, 0.1%, 5 ppm, 1/4 W resistors. The reference designators for the current loop resistors have the following format: for input channel x, the resistor is RCLx. For example, the resistor for channel 28 is RCL28. Caution: Before installing the resistors in your
