Rockwell Automation AB quality Allen-Bradley 1746-INT4 User manual

Thermocouple/mV
Isolated Input
Module
Catalog Number 1746-INT4
User Manual

Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application,
Installation and Maintenance of Solid State Controls (publication SGI-1.1
available from your local Rockwell Automation sales office or online at
http://literature.rockwellautomation.com) describes some important
differences between solid state equipment and hard-wired electromechanical
devices. Because of this difference, and also because of the wide variety of
uses for solid state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this
equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for
indirect or consequential damages resulting from the use or application of
this equipment.
The examples and diagrams in this manual are included solely for illustrative
purposes. Because of the many variables and requirements associated with
any particular installation, Rockwell Automation, Inc. cannot assume
responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to
use of information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without
written permission of Rockwell Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware
of safety considerations.
Allen-Bradley, SLC 500, SLC, RSLogix 500, TechConnect, Rockwell Automation, ControlLogix, and RSLinx are trademarks of
Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
WARNING Identifies information about practices or circumstances that can cause
an explosion in a hazardous environment, which may lead to personal
injury or death, property damage, or economic loss.
IMPORTANT Identifies information that is critical for successful application and
understanding of the product.
ATTENTION Identifies information about practices or circumstances that can lead
to personal injury or death, property damage, or economic loss.
Attentions help you identify a hazard, avoid a hazard, and recognize
the consequence
SHOCK HAZARD Labels may be on or inside the equipment, for example, a drive or
motor, to alert people that dangerous voltage may be present.
BURN HAZARD Labels may be on or inside the equipment, for example, a drive or
motor, to alert people that surfaces may reach dangerous
temperatures.

3Publication 1746-UM614B-EN-P - September 2007
Table of Contents
Preface
Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . 7
Purpose of This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Additional Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Common Techniques Used in this Manual . . . . . . . . . . . . . . . 8
Chapter 1
Module Overview
Compliance with European Union Directives . . . . . . . . . . . . . 9
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Block Diagram of Isolated-Channel Input Circuits. . . . . . . . . 15
Chapter 2
Quick Start
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Channel Configuration Worksheet . . . . . . . . . . . . . . . . . . . . 22
Chapter 3
Install and Wire the Module
Electrostatic Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Module Installation and Removal . . . . . . . . . . . . . . . . . . . . . 27
Wire the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Install the Ferrite Collar . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Chapter 4
Preliminary Operating
Considerations
Module ID Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Module Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Input Channel Characteristics. . . . . . . . . . . . . . . . . . . . . . . . 38
Response to Slot Disabling . . . . . . . . . . . . . . . . . . . . . . . . . 40
Chapter 5
Access Files to Configure I/O
Click and Drag Configuration . . . . . . . . . . . . . . . . . . . . . . . 41
Read IO Config Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Chapter 6
Channel Configuration, Data, and
Status
Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Channel Configuration Procedure . . . . . . . . . . . . . . . . . . . . 50
Use Channel Data Words. . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Use Channel Status Words. . . . . . . . . . . . . . . . . . . . . . . . . . 53

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4Table of Contents
Chapter 7
Ladder Programming Examples
Processor Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Load Channel Configurations for Transfer to the Module . . . 58
Change a Channel Configuration . . . . . . . . . . . . . . . . . . . . . 59
Verify Changes to a Channel Configuration . . . . . . . . . . . . . 61
Process a Channel Input with the PID Instruction. . . . . . . . . 62
Monitor Channel Status Bits. . . . . . . . . . . . . . . . . . . . . . . . . 63
Chapter 8
Module Diagnostics and
Troubleshooting
Module and Channel Diagnostics. . . . . . . . . . . . . . . . . . . . . 65
LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Contacting Rockwell Automation . . . . . . . . . . . . . . . . . . . . . 70
Chapter 9
Application Programming
Examples
Basic Example
(to display a temperature) . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Supplementary Example (select display in °C or °F) . . . . . . . 73
Appendix A
Module Specifications
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . 80
Input Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Appendix B
Channel Configuration
Worksheets
Appendix C
Thermocouple Descriptions
J Type Thermocouple
(iron versus copper-nickel <Constantan>) . . . . . . . . . . . . . . 97
K Type Thermocouple (nickel-chromium versus
nickel-aluminum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
T Type Thermocouple (copper versus copper-nickel
<Constantan>) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
E Type Thermocouple (nickel-chromium versus
copper-nickel <Constantan>). . . . . . . . . . . . . . . . . . . . . . . 100
S and R Type Thermocouple S (platinum-10% rhodium
versus platinum)
R (platinum-13% rhodium versus platinum) . . . . . . . . . . . . 101
C and D Type Thermocouples
C (tungsten-5% rhenium versus tungsten-26% rhenium)
D (tungsten-3% rhenium versus tungsten-25% rhenium) . . . 102

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Table of Contents 5
Appendix D
Channel Calibration
About the Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Appendix E
CSA Hazardous Location Approval
Glossary
Index

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6Table of Contents

7Publication 1746-UM614B-EN-P - September 2007
Preface
Use This Manual
Read this preface to familiarize yourself with the rest of the manual.
This preface covers the following topics:
•Who should use this manual
•The purpose of this manual
•Terms and abbreviations
•Conventions used in this manual
•Allen-Bradley support
Who Should Use This
Manual
Use this manual if you are responsible for designing, installing,
programming, or troubleshooting control systems that use
Allen-Bradley small logic controllers.
You should have a basic understanding of SLC 500 products. You
should understand programmable controllers and be able to interpret
the ladder logic instructions required to control your application. If
you do not, contact your local Allen-Bradley representative for
information on available training courses before using this product.
Purpose of This Manual
This manual is a reference guide for the module. The manual:
•gives you an overview of system operation.
•explains the procedures you need to install and wire the module
at the application site.
•provides ladder programming examples.
•provides an application example of how this input module can
be used to control a process.

Publication 1746-UM614B-EN-P - September 2007
8Preface
Additional Resources
The following documents contain information that may be helpful to
you as you use Allen-Bradley SLC products. To obtain a copy of any
of the Allen-Bradley documents listed, contact your local
Allen-Bradley office or distributor.
Common Techniques Used
in this Manual
The following conventions are used throughout this manual:
•Bulleted lists such as this one provide information, not
procedural steps.
•Numbered lists provide sequential steps or hierarchical
information.
•Text in this font indicates words or phrases you should type.
Resource Description
SLC 500 Systems Selection Guide, publication 1747-SG001 An overview of the SLC 500 family of products
SLC 500 Module Hardware Style User Manual, publication
1747-UM011 A description on how to install and use your modular SLC 500
programmable controller
Installation & Operation Manual for Fixed Hardware Style
Programmable Controllers, publication 1747-6.21 A description on how to install and use your fixed SLC 500
programmable controller
SLC 500 Instruction Set Reference Manual, publication
1747-RM001 A reference manual that contains status file data, instruction set,
and troubleshooting information about the software
SLC 500 4-Channel Analog I/O Modules User’s Manual, publication
1746-UM005 A resource manual and user’s guide containing information about
the analog modules used in your SLC 500 system.
Industrial Automation Wiring and Grounding Guidelines, publication
1770-4.1 In-depth information on grounding and wiring Allen-Bradley
programmable controllers
Application Considerations for Solid-State Controls. publication
SGI-1.1 A description of important differences between solid-state
programmable controller products and hard-wired
electromechanical devices
National Electrical Code, published by the National Fire Protection
Association of Boston, MA An article on wire sizes and types for grounding electrical equipment

9Publication 1746-UM614B-EN-P - September 2007
Chapter 1
Module Overview
This chapter describes the thermocouple/millivolt isolated input
module and explains how the SLC controller reads thermocouple or
millivolt analog input data from the module. The following
information is included:
•Compliance with European Union Directives
•General description and hardware features
•An overview of system and module operation
•Block diagram of channel input circuits
Compliance with European
Union Directives
If this product has the CE mark, it is approved for installation within
the European Union and EEA regions. It has been designed and tested
to meet the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards, in
whole or in part, documented in a technical construction file:
•EN 50081-2EMC — Generic Emission Standard, Part 2 —
Industrial Environment
•EN 50082-2EMC — Generic Immunity Standard, Part 2 —
Industrial Environment
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low Voltage,
by applying the safety requirements of EN 61131–2 Programmable
Controllers, Part 2 — Equipment Requirements and Tests.
For specific information required by EN 61131-2, see the appropriate
sections in this publication, as well as the Industrial Automation
Wiring and Grounding Guidelines (for noise immunity), publication
1770-4.1.
This equipment is classified as open equipment and must be mounted
in an enclosure during operation to provide safety protection.

Publication 1746-UM614B-EN-P - September 2007
10 Module Overview
General Description
The module stores digitally-converted thermocouple and/or millivolt
(mV) analog data in its image table for retrieval by all fixed and
modular SLC 500 processors. The module supports connections from
any combination of up to four thermocouple and/or mV analog
sensors.
Input Ranges
The following tables define thermocouple types and associated
temperature ranges and the millivolt analog-input signal ranges that
each of the module’s input channel supports.
Refer to the specifications in Appendix A to determine the practical
temperature range of your thermocouple.
Each input channel is individually configurable for a specific input
device, and provides open-circuit, over-range, and under-range
detection and indication.
Thermocouple Temperature Ranges
Type °C Temperature Range °F Temperature Range
C0…2317 32… 4201
D0… 2317 32…4201
J-210…760 -346…1400
K-270…1370 -454…2498
T-270…400 -454…752
B300…1820 572…3308
E-270…1000 -454…1832
R0…1768 32…3214
S0…1768 32…3214
N0…1300 32…2372
CJC Sensor 0…85 32…185
Millivolt Input Ranges
-50…50 mV
-100…100 mV