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National Instruments SCXI-1322 Installation Manual

High-voltage terminal block
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INSTALLATION GUIDE
SCXI -1322 H
™
Introduction
What You Need to Get Started
CVI™, LabVIEW™, and National Instruments™, ni.com™, NI-DAQ™, and SCXI™ are trademarks of National Instruments Corporation. Product and
company names are trademarks or trade names of their respective companies.
321925B-01
© Copyright 1993, 1999 National Instruments Corp. All rights reserved.
-V
IGH
OLTAGE
This guide describes how to use and install the SCXI-1322 terminal block
with the SCXI-1122 module.
The SCXI-1322 terminal block consists of a shielded board with 48 screw
terminals for easy connection to the SCXI-1122 input connector. Sixteen
pairs of screw terminals connect to the SCXI-1122 module inputs. The
remaining seven pairs of screw terminals are for the module excitation
channels.
To set up and use your SCXI-1322 terminal block, you need the following
items:
SCXI-1322 terminal block
SCXI-1322 High-Voltage Terminal Block Installation Guide
SCXI chassis
SCXI-1122 module
Number 1 and 2 Phillips-head screwdrivers
1/8 in. flathead screwdriver
Long-nose pliers
Wire cutter
Wire insulation stripper
T
B
ERMINAL
LOCK
November 1999

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Summary of Contents for National Instruments SCXI-1322

  • Page 1 Long-nose pliers Wire cutter Wire insulation stripper CVI™, LabVIEW™, and National Instruments™, ni.com™, NI-DAQ™, and SCXI™ are trademarks of National Instruments Corporation. Product and company names are trademarks or trade names of their respective companies. 321925B-01 © Copyright 1993, 1999 National Instruments Corp. All rights reserved.

  • Page 2: Safety Information

    If the device is damaged, turn the device off and do not use until service-trained personnel can check its safety. If necessary, return the device to National Instruments for service and repair to ensure that its safety is not compromised.
  • Page 3 Do not substitute parts or modify equipment. Because of the danger of introducing additional hazards, do not install unauthorized parts or modify the device. Return the device to National Instruments for service and repair to ensure that its safety features are not compromised.
  • Page 4 I * R drop. LEAD VEX + VEX – 3.333 V 240+ 2R Ω Ω Ω LEAD << 240Ω CH+(0) CH+(1) CH+(15) LEAD Ω Ω Ω LEAD Figure 2. No Remote Sensing SCXI-1322 Installation Guide www.ni.com...
  • Page 5 120 Ω 120 Ω SENSE + 120 Ω SENSE – 120 Ω 120 Ω 120 Ω CH+(6) CH+(3) CH+(10) 120 Ω 120 Ω 120 Ω Figure 3. Multiple Loads with Bad Remote Sensing © National Instruments Corporation SCXI-1322 Installation Guide...

  • Page 6: Temperature Sensor Output And Accuracy

    Temperature Sensor Output and Accuracy The SCXI-1322 temperature sensor outputs 1.91 to 0.58 V from 0 to 55 °C and has an accuracy of ±0.5 °C over the 15 to 35 °C range and ±0.9 °C over the 0 to 15 °C and 35 to 55 °C ranges.

  • Page 7: Signal Connection

    When connecting your signals to the SCXI-1322, follow the labeling on the SCXI-1322 for the appropriate module, as indicated in Figure 5. To connect the signal to the terminal block, perform the following steps, referring to Figures 4 and 5 as necessary: Unscrew the top cover screws and remove the cover.
  • Page 8 Figure 4 shows the SCXI-1322 terminal block parts locator diagram. Back View Front View 1 Strain-Relief Bar 3 Safety-Ground 4 Mating Connector 6 Top Cover Screws 2 Strain-Relief Screws Solder Lug 5 Thumbscrew 7 Top Cover Figure 4. SCXI-1322 Parts Locator Diagram Figure 5 shows the SCXI-1322 signal connections.

  • Page 9: Installation

    Output ..........1.91 to 0.58 V from 0 to 55 °C Common-mode isolation Terminal to terminal ....... 250 V Terminal to earth......480 V The temperature sensor accuracy includes tolerances in all component values, effects caused by temperature, loading, self-heating, and temperature gradients. © National Instruments Corporation SCXI-1322 Installation Guide...

  • Page 10: Temperature Sensor Circuit Diagram

    Installation Category II Pollution Degree 2 Temperature Sensor Circuit Diagram The circuit diagram in Figure 6 is optional information that you can use if you want more details about the SCXI-1322 temperature sensor. +5 V 4.7 kΩ 2.5 V 5 kΩ...

  • Page 11: Technical Support Resources

    NI Web Support To provide you with immediate answers and solutions 24 hours a day, 365 days a year, National Instruments maintains extensive online technical support resources. They are available to you at no cost, are updated daily, and can be found in the Technical Support section of our Web site at www.ni.com/support...

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