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INSTALLATION GUIDE
SCXI
™
-1300/1301 T
Introduction
SCXI-1300
SCXI-1301
LabVIEW
™
, National Instruments
herein are trademarks or trade names of their respective companies.
322715A-01
This guide describes how to install and use the SCXI-1300 and SCXI-1301
terminal block with your SCXI module.
The following sections describe the SCXI-1300/1301 terminal blocks and
their associated screw terminals.
Using the SCXI-1300 terminal block with 32-channel SCXI modules, you
can conveniently connect signals through screw terminals. Your terminal
block has the following features:
•
Seventy-two screw terminals
•
A cold-junction temperature sensor
•
Thirty-two pairs of screw terminals that connect to the 32 differential
inputs of the SCXI module
•
Two screw terminals that connect to the module functional chassis
ground pins
•
A solder lug available as a safety chassis ground
•
Additional screw terminals connect to the SCXI module OUTPUT,
the SCXI module AOREF, and to the SCXIbus GUARD
Using the SCXI-1301 terminal block, which has 20 screw terminals, you
can conveniently connect signals to the SCXI-1140 module. Your terminal
block has the following features:
•
Eight pairs of screw terminals connect to the eight differential inputs
of the SCXI-1140 module
•
Two screw terminals that connect to the AGND of the module
•
Additional screw terminals that connect to the HOLD signal and
functional chassis ground
™
, ni.com
™
, and SCXI
™
are trademarks of National Instruments Corporation. Product and company names mentioned
© Copyright 2000 National Instruments Corp. All rights reserved.
B
ERMINAL
LOCK
May 2000
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Related Manuals for National Instruments SCXI-1300
Summary of Contents for National Instruments SCXI-1300
- Page 1 INSTALLATION GUIDE SCXI ™ -1300/1301 T ERMINAL LOCK This guide describes how to install and use the SCXI-1300 and SCXI-1301 terminal block with your SCXI module. Introduction The following sections describe the SCXI-1300/1301 terminal blocks and their associated screw terminals. SCXI-1300 Using the SCXI-1300 terminal block with 32-channel SCXI modules, you can conveniently connect signals through screw terminals.
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Page 2: What You Need To Get Started
What You Need to Get Started To set up and use your SCXI-1300/1301 terminal block, you need the following items: SCXI-1300 or SCXI-1301 terminal block SCXI-1300/1301 Terminal Block Installation Guide SCXI chassis SCXI module Your SCXI module user manual Number 1 and 2 Phillips-head screwdrivers 1/8 in. -
Page 3: Connecting Signal Wires To The Terminal Block
Solder Lug 5 Thumbscrew 7 Top Cover Figure 1. SCXI-1300/1301 Parts Locator Diagram Run the signal wires through the strain-relief opening. You can add insulation or padding if necessary. Prepare your signal wire by stripping the insulation to no more than 7 mm. - Page 4 Reinstall the strain-relief bar and tighten the strain-relief screws. Reinstall the top cover and tighten the top cover screws. When connecting signals to the SCXI-1300 terminal block, follow the labeling on the SCXI-1300 terminal block, as indicated in Figure 2. 1 Screw Terminals 2 Mating Connector Figure 2.
- Page 5 2 Mating Connector Figure 3. SCXI-1301 Signal Connections You are ready to connect the terminal block to the module front connector as explained in the Connecting the Terminal Block to the SCXI Module section. © National Instruments Corporation SCXI-1300/1301 Terminal Block...
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Page 6: Connecting The Terminal Block To The Scxi Module
Leave jumper W1 on the SCXI-1100 in the factory-default (parking) position. • Ground the negative lead of the thermocouple inside the SCXI-1300 terminal block, by connecting CH– to CHSGND as shown in Figure 4. In most applications, this is the most convenient grounding option. - Page 7 1 Channel 0 2 Chassis Ground 3 Thermocouple Figure 4. Connecting a Thermocouple to SCXI-1300 Channel 0 © National Instruments Corporation SCXI-1300/1301 Terminal Block...
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Page 8: Converting The Temperature Sensor Output Voltage To Temperature
Converting the Temperature Sensor Output Voltage to Temperature The integrated-circuit temperature sensor outputs 10 mV/°C. If your application software does not provide voltage-to-temperature conversion for the cold-junction reference (CJR) of the SCXI-1300, you can determine the CJR temperature using the following formulas: T °C... -
Page 9: Cleaning The Terminal Block
Specifications All specifications are typical at 25 °C unless otherwise specified. Electrical (Cold-Junction Sensor on the SCXI-1300) Sensor type..........Integrated circuit (LM35CAZ) Accuracy ..........± 1.3 °C from 0 to 50 °C Repeatability ..........
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