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Allen-Bradley 1746-NT8 User Manual

Allen-Bradley 1746-NT8
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Publication 1746-UM022B-EN-P - January 2005
Table of Contents iii
Out-of-Range Detection (Bit 13 for Under Range, Bit 14 for
Over Range) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Channel Error (Bit 15) . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Module Status LED (Green) . . . . . . . . . . . . . . . . . . . . . 6-5
Interpreting I/O Error Codes . . . . . . . . . . . . . . . . . . . . . . . 6-5
Chapter 7
Maintaining Your Module And
Safety Considerations
Preventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Appendix A
Module Specifications
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . A-2
Input Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Overall Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Millivolt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Thermocouple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Appendix B
Using Grounded Junction,
Ungrounded Junction, and
Exposed Junction Thermocouples
Thermocouple Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Grounded Junction . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Ungrounded (Insulated) Junction . . . . . . . . . . . . . . . . . B-2
Exposed Junction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Grounded Junction . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Exposed Junction Thermocouples. . . . . . . . . . . . . . . . . B-4
Appendix C
Configuring the 1746-NT8 Module
with RSLogix 500
Glossary
Index

Table of Contents

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Allen-Bradley 1746-NT8 Specifications

General IconGeneral
BrandAllen-Bradley
Model1746-NT8
CategoryI/O Systems
LanguageEnglish

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