National Instruments SCXI -1122 - Manual (Page 8)

© National Instruments Corporation ix SCXI-1122 User Manual
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 conditioning of strain gauges, RTDs,
thermistors, thermocouples, volt and millivolt sources, and 4 to 20 mA sources or 0 to 20 mA
process-current sources where high common-mode voltages exist. The SCXI-1122 operates as 16
isolated input channels, one isolated current excitation channel, and one voltage excitation channel.
All 16 channels are isolated from earth ground but not from each other. The excitation circuits are
both isolated from earth ground, the input channels, and between each other.
Organization of This Manual
The SCXI-1122 User Manual is organized as follows:
Chapter 1, Introduction, 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.
Chapter 2, Configuration and Installation, describes how to configure the SCXI-1122
jumpers and how to install the SCXI-1122 into the SCXI chassis.
Chapter 3, Signal Connections, describes the input and output signal connections to the
SCXI-1122 module via the SCXI-1122 front connector and rear signal connector. This
chapter also includes specifications and connection instructions for the signals on the
SCXI-1122 connectors.
Chapter 4, Theory of Operation, contains a functional overview of the SCXI-1122 module
and explains the operation of each functional unit making up the SCXI -1122.
Chapter 5, Calibration, discusses the calibration procedures for the SCXI-1122.
Appendix A, Specifications, lists the specifications for the SCXI-1122.
Appendix B, Customer Communication, contains forms you can use to request help from
National Instruments or to comment on our products.
The Glossary contains an alphabetical list and description of terms used in this manual,
including abbreviations, acronyms, metric prefixes, mnemonics, symbols, and terms.
The Index contains an alphabetical list of key terms and topics in this manual, including the
page where you can find each one.