NI SCXI-1000 SCXI Chassis User Manual

NI SCXI-1000 Корпус SCXI Руководство пользователя

The SCXI Chassis User Manual is one piece of the documentation set for the data acquisition and SCXI system. You could have any of several types of documents, depending on the hardware and software in the system. Use the documents you have as follows: 

 • The SCXI Quick Start Guide—This document describes how to set up an SCXI chassis, install SCXI modules and terminal blocks, and configure the SCXI system in Measurement & Automation Explorer (MAX). 

 • The SCXI hardware user manuals—Read these manuals next for detailed information about signal connections and module configuration. They also explain in greater detail how the module works and contain application hints. 

 • The DAQ hardware user manuals—These manuals have detailed information about the DAQ hardware that plugs into or is connected to the computer. Use these manuals for hardware installation and configuration instructions, specification information about the DAQ hardware, and application hints. 

 • Software documentation—Examples of software documentation you may have are the LabVIEW, Measurement Studio, and NI-DAQ documentation sets. After you set up the hardware system, use either the application software (LabVIEW or Measurement Studio) or the NI-DAQ documentation to help you write your application. If you have a large, complicated system, it is worthwhile to look through the software documentation before you configure the hardware. 

 • Accessory installation guides or manuals—If you are using accessory products, read the terminal block and cable assembly installation guides or accessory user manuals. They explain how to physically connect the relevant pieces of the system. Consult these guides when you are making the connections. 

 • If you are designing your own module, the SCXIbus System Specification is available from NI upon request. This specification describes the physical, electrical, and timing requirements for the SCXIbus.

Optional Equipment

NI provides a full line of modules that amplify, filter, isolate, and multiplex a wide variety of signal types, such as thermocouples, resistance temperature detectors (RTDs), strain gauges, high-voltage inputs, current inputs, analog outputs, and digital I/O signals. Cables and terminal blocks with screw terminals, BNC connectors, or thermocouple plugs are available to connect signals to the modules. Refer to the latest NI catalog and ni.com/catalog for a complete listing of sensors and I/O types supported in SCXI

Configuring and Installing the SCXI Chassis

NI provides a full line of modules that amplify, filter, isolate, and multiplex a wide variety of signal types, such as thermocouples, resistance temperature detectors (RTDs), strain gauges, high-voltage inputs, current inputs, analog outputs, and digital I/O signals. Cables and terminal blocks with screw terminals, BNC connectors, or thermocouple plugs are available to connect signals to the modules. Refer to the latest NI catalog and ni.com/catalog for a complete listing of sensors and I/O types supported in SCXI.

Configuring and Installing the SCXI Chassis

This chapter contains instructions for configuring and installing the SCXI chassis. It describes the following: 

 • Chassis address selection 

 • Voltage and fuse selection 

 • Chassis, modules, and accessories installation 

 • Fan filter maintenance

Configuring the SCXI Chassis

Configuring the chassis involves selecting a chassis or high-level data link control (HDLC) address, line voltage, and fuse value on any chassis. Note Refer to the Read Me First: Safety and Radio-Frequency Interference document before removing equipment covers or connecting or disconnecting any signal wires.

Selecting Chassis Addresses 

These sections provide information about how to select addresses for the SCXI chassis.

SCXI-1000/1001

Unless you are using multiple chassis and need to configure one or more SCXI chassis for a different address, you can skip this section, and the SCXI chassis retains factory-default address of 0. You can configure the SCXI chassis for one of 32 different addresses so that you can connect multiple SCXI chassis to the same control source. The five switches on the front panel of Slot 0 determine the chassis address. Switches one through five represent the values 1, 2, 4, 8, and 16, when set to the ON position. When set to the OFF position, their value is zero. The chassis address is the sum of the switch values. Figure 2-7 shows examples of both the factory-default setting of the chassis address 0 and the switch setting for chassis address 19

Notes SCXI-1000 chassis through revision D do not have address jumpers or switches and respond to any address, but you cannot use them in multichassis systems. Revision E chassis use jumpers on Slot 0 for chassis addressing. Revision F and later chassis use a DIP switch for chassis addressing. SCXI-1001 chassis through revision D use jumpers on Slot 0 for chassis addressing. Revision E and later chassis use a DIP switch for chassis addressing.