Rockwell Automation Allen-Bradley 794-IRT8 User Manual

FLEX I/O Thermocouple, RTD, and Millivolt

Input Modules

Catalog Numbers 1794-IRT8, 1794-IRT8K, 1794-IRT8XT

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.

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, such as a drive or motor, to alert people that dangerous voltage may be present.

BURN HAZARD

Labels may be on or inside the equipment, such as a drive or motor, to alert people that surfaces may reach dangerous temperatures.

Allen-Bradley, Rockwell Automation, FLEX I/O, RSLinx, RSLogix 5000 and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

New and Updated

Information

Summary of Changes

This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph.

This table contains the changes made to this revision.

Changes

Addition of two catalogs – 1794-IRT8K and 1794-IRT8XT

The following sections have been added to Chapter 1 – Overview of FLEX I/O and Your Thermocouple, RTD, and Millivolt Input Module:

•The FLEX System

•Types of Modules

•What the FLEX I/O Input Module Does

•The FLEX I/O Module in a Logix Control System

The following section has been added to Chapter 2 – Install Your FLEX I/O Input

Module:

8

Page

1, 53

1

•Series A and Series B

The following new topics have been added:

•Configure Your FLEX I/O Module with RSLogix 5000 Software

(Chapter 3)

•Troubleshoot the Module (Chapter 6)

•Electronic Data Sheet (EDS) Files (Appendix B)

The following topic, previously Chapter 3 in the last revision, has been relegated to the Appendices section:

•Program Your Thermocouple/RTD Input Module (Appendix C)

21

51

57

59

Additional less significant changes (such as improvement of drawings) have been made throughout the document. iii Publication 1794-6.5.12 - September 2011

iv

Summary of Changes

Notes:

Publication 1794-6.5.12 - September 2011

Table of Contents v

Summary of Changes

New and Updated Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Preface

Who Should Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Purpose of the Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

About the Vocabulary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x

Common Techniques Used in this Manual. . . . . . . . . . . . . . . . . . . . . . xii

Overview of FLEX I/O and Your

Thermocouple, RTD, and

Millivolt Input Module

Chapter 1

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

The FLEX System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Types of Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

What the FLEX I/O Input Module Does . . . . . . . . . . . . . . . . . . . . . . . 2

The FLEX I/O Module in a Logix Control System . . . . . . . . . . . . . . . 3

Physical Features of Your Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Install Your FLEX I/O Input

Module

Chapter 2

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Before You Install Your Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Series A and Series B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Install the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Mount on a DIN Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Mount on a Panel or Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Mount the FLEX I/O Module on the Terminal Base Unit . . . . . 14

Wiring Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Connect Wiring to the FLEX I/O Module . . . . . . . . . . . . . . . . . . 16

Identify RTD Wire Pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Configure Your FLEX I/O

Module with RSLogix 5000

Software

Chapter 3

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Add and Configure the FLEX I/O Module . . . . . . . . . . . . . . . . . . . . . 21

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Read and Write Configuration

Maps for the FLEX I/O Module

Chapter 4

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Configure Your Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Configurable Options and Their Effect on the Channels . . . . . . . . . . 27

Options that Affect All Channels . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Options that Affect Each Group of Four Inputs . . . . . . . . . . . . . 28

Sensor Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Read Data From the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Publication 1794-6.5.12-EN-E - September 2011

vi

Table of Contents

Calibrate Your Module

Troubleshoot the Module

Specifications

Electronic Data Sheet (EDS)

Files

Map Data for the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Thermocouple and RTD Input Module Image Table

Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Block Transfer Read and Write . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Bit/Word Descriptions for the Input Module Block Transfer

Read Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Using Series A Functionality in a

Series B Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Chapter 5

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

When and How to Calibrate Your FLEX I/O Module. . . . . . . . . . . . 39

Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Calibrate Your Input Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Calibration Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Wiring Connections for Calibrating the Thermocouple and

RTD Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Read and Write Words for Calibration. . . . . . . . . . . . . . . . . . . . . . 42

EDT Calibration Command and Command Data Summary . . . . 44

Offset Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Gain Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Current Source Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Cold Junction Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Channel Loop Compensation Calibration . . . . . . . . . . . . . . . . . . . 49

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Chapter 6

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Module Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Appendix A

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

General Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Appendix B

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Updating EDS File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

EDS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Publication 1794-6.5.12-EN-E - September 2011

Table of Contents vii

Programming Your Module with PLC Family Processors

Safety Approvals

Appendix C

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Enter Block Transfer Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

PLC-2 Family Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

PLC-3 Family Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

PLC-5 Family Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

PLC-5/250 Family Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Appendix D

European Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . . . . 65

North American Hazardous Location Approval . . . . . . . . . . . . . . . . . 66

Index

Publication 1794-6.5.12-EN-E - September 2011

viii

Table of Contents

Notes:

Publication 1794-6.5.12-EN-E - September 2011

Who Should Use This

Manual

Preface

Read this preface to familiarize yourself with the rest of the manual. It provides information concerning:

• who should use this manual

• the purpose of this manual

• related documentation

• conventions used in this manual

• terminology used in this manual

We assume that you have previously used an Allen-Bradley programmable controller, that you are familiar with its features, and that you are familiar with the terminology we use. If not, read the user manual for your processor before reading this manual.

Purpose of the Manual

This manual is a reference guide for the FLEX I/O Thermocouple, RTD,

Millivolt Input Modules. It describes the procedures for installing, configuring and troubleshooting your module. For more information, consult the following chapters.

Topic See

Overview of FLEX I/O and Your Thermocouple, RTD, and Millivolt Input Module Chapter 1

Install Your FLEX I/O Input Module

Configure Your FLEX I/O Module with RSLogix 5000 Software

Read and Write Configuration Maps for the FLEX I/O Module

Calibrate Your Module

Chapter 2

Chapter 3

Chapter 4

Chapter 5

Troubleshoot the Module

Specifications

Electronic Data Sheet (EDS) Files

Programming Your Module with PLC Family Processors

Safety Approvals

Chapter 6

Appendix A

Appendix B

Appendix C

Appendix D ix

About the Vocabulary

This manual covers the 1794-IRT8, 1794-IRT8K, and 1794-IRT8XT modules, which are identical, except that the 1794-IRT8K is conformally coated.

In this manual, we refer to:

• the individual Thermocouple, RTD, and mV module as the “module,” or “TC, RTD, and mV module.”

• the programmable controller as the “controller” or the “processor.”

Publication 1794-6.5.12 - September 2011

x

Preface

Related Documentation

The following documents contain additional information about Rockwell

Automation products. To obtain a copy, contact your local

Rockwell Automation office or distributor.

Resource Description

FLEX I/O Product Profile, publication 1794-PP019 xxxxx Comprehensive product profile for the FLEX I/O product line.

FLEX I/O ControlNet Redundant Media Adapter, publication 1794-5.18

x xxxx

FLEX I/O EtherNet/IP Adapter Module Installation

Instructions, publication 1794-IN082 x xxxx

Information on how to install the FLEX I/O ControlNet Redundant Media

Adapter (1794-ACNR).

Information on how to install the FLEX I/O EtherNet/IP Adapter Module

(Catalog No. 1794-AENT).

FLEX I/O ControlNet Adapter Module Installation

Instructions, publication 1794-IN128 x xxxx

Information on how to install the ControlNet Adapter Modules

(Catalog No. 1794-ACN15, 1794-ACN15K, 1794-ACNR15, 1794-ACNR15XT,

Series D).

FLEX I/O DeviceNet Adapter Module Installation

Instructions, publication 1794-IN099 x xxxxxxxxxxxxx

Remote I/O Adapter Modules Installation Instructions, publication 1794-IN098 x xxxxxxxxxxxxx

Remote I/O Adapter Module User Manual, publication

1794-UM009 x xxxxxxxxxxxxx

FLEX I/O PROFIBUS Adapter Module Installation

Instructions, publication 1794-IN087 x xxxxxxxxxxxxx

Information on how to install the FLEX I/O DeviceNet Adapter Modules

(Catalog No. 1794-ADN, 1794-ADNK).

Information on how to install the Remote I/O Adapter Modules

(Catalog No. 1794-ASB, 1794-ASB2, 1794-ASBK, 1794-ASB2K).

Information on how to use the Remote I/O Adapter Module

(Catalog No. 1794-ASB).

Information on how to install the FLEX I/O PROFIBUS Adapter

(Catalog No. 1794-APB).

FLEX I/O PROFIBUS Adapter Module User Manual, publication 1794-UM057 x xxxxxxxxxxxxx

Flex I/O Digital Input Modules Installation Instructions, publication 1794-IN093 x xxxxxxxxxxxxx

Flex I/O Digital DC Sourcing Input and Sinking Output

Modules Installation Instructions, publication 1794-IN095 x xxxxxxxxxxxxx

Flex I/O Digital DC Sourcing Output Modules Installation

Instructions, publication 1794-IN094 x xxxxxxxxxxxxx

Flex I/O Input/ Output Module Installation Instructions, publication 1794-IN083 x xxxxxxxxxxxxx

Flex I/O 8 Output Relay Module Installation Instructions, publication 1794-IN019 x xxxxxxxxxxxxx

FLEX I/O Input, Output and Input/Output Analog Modules

Installation Instructions, publication 1794-IN100 xxxxxxx

FLEX I/O Analog Module User Manual, publication 1794-6.5.2

x xxxxxxxxxxxxx

Information on how to use the FLEX I/O PROFIBUS Adapter Module

(Catalog No. 1794-APB).

Information on how to install the Flex I/O Digital Input Modules

(Catalog No. 1794-IB8, 1794-IB16, 1794-IB16K, 1794-IB32).

Information on how to install the Flex I/O Digital DC Sourcing Input and

Sinking Output Modules (Catalog No. 1794-IV16, 1794-OV16, 1794-OV16P).

Information on how to install the Flex I/O Digital DC Sourcing Output Modules

(Catalog No. 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P, 1794-OB32P).

Information on how to install the Flex I/O Input/ Output Modules

(Catalog No. 1794-IB16XOB16P, 1794-IB10XOB6).

Information on how to install the Flex I/O 8 Output Relay Modules

(Catalog No. 1794-OW8, 1794-OW8K, 1794-OW8XT).

Information on how to install the FLEX I/O Input, Output and Input/Output

Analog Modules (Catalog No. 1794-IE8, 1794-IE4XOE2, 1794-OE4, 1794-IE8K,

1794-OE4K).

Information on how to install the FLEX I/O Analog Modules

(Catalog No. 794-OE4, 1794-IE8, 1794-IE12, 1794-OE12, 1794-IE4XOE2,

1794-IE8XOE4, 1794-IE4XOE2XT, 1794-IE8XT, 1794-OE4XT).

FLEX I/O Isolated Analog Output Module Installation

Instructions, publication 1794-IN037 x xxxxxxxxxxxxx

Information on how to install the FLEX I/O Isolated Analog Output Module

(Catalog No. 1794-OF4I).

Publication 1794-6.5.12 - September 2011

Preface xi

Resource

FLEX I/O 4 Isolated Input Module Installation Instructions, publication 1794-IN038 x xxxxxxxxxxxxx

FLEX I/O 2 In/2 Out Isolated Analog Combo Module

Installation Instructions, publication 1794-IN039 x xxxxxxxxxxxxx

FLEX I/O Isolated Analog Modules User Manual, publication 1794-6.5.8

x xxxxxxxxxxxxx

Description

Information on how to install the FLEX I/O 4 Isolated Input Module

(Catalog No. 1794-IF4I).

Information on how to install the FLEX I/O 2 In/2 Out Isolated Analog Combo

Module (Catalog No. 1794-IF2XOF2I).

Information on how to use the FLEX I/O Isolated Analog Modules

(Catalog No. 1794-IF4I, 1794-OF4I, 1794-IF2XOF2I, 1794-IF4IXT, 1794-IF4ICFXT,

1794-OF4IXT, 1794-IF2XOF2IXT).

FLEX I/O 8 Thermocouple Input Module Installation

Instructions, publication 1794-IN021 x xxxxxxxxxxxxx

FLEX I/O 8 Input RTD Module User Manual, publication 1794-6.5.4

x xxxxxxxxxxxxx

FLEX I/O Thermocouple/Millivolt Input Module User

Manual, publication 1794-6.5.7

x xxxxxxxxxxxxx

FLEX I/O Thermocouple/RTD Input Analog Module

Instructions, publication 1794-IN050 x xxxxxxxxxxxxx

2-Input Frequency Module Installation Instructions, publication 1794-IN049 x xxxxxxxxxxxxx

FLEX I/O Frequency Input Module User Manual, publication 1794-6.5.11

x xxxxxxxxxxxxx

24V FLEX I/O 2 Channel Incremental Encoder Module

Installation Instructions, publication 1794-IN063 x xxxxxxxxxxxxx

FLEX Integra Analog Module User Manual, publication 1793-6.5.1

x xxxxxxxxxxxxx

FLEX I/O 4 Channel Pulse Counter Module Installation

Instructions, publication 1794-IN064 x xxxxxxxxxxxxx

FLEX I/O Very High Speed Counter Module Installation

Instruction, publication 1794-IN067 x xxxxxxxxxxxxx

FLEX I/O 48V DC Input and Output Modules Installation

Instructions, publication 1794-IN105 x xxxxxxxxxxxxx

FLEX I/O AC Digital Input Modules Installation

Instructions, publication 1794-IN102 x xxxxxxxxxxxxx

FLEX I/O Digital AC Output Modules Installation

Instructions, publication 1794-IN103 x xxxxxxxxxxxxx

FLEX I/O 220V AC Input and Output Modules Installation

Instructions, publication 1794-IN104 x xxxxxxxxxxxxx

FLEX I/O Terminal Base Units Installation Instructions, publication 1794-IN092 x xxxxxxxxxxxxx

Information on how to install the FLEX I/O 8 Thermocouple Input Modules

(Catalog No. 1794-IT8, 1794-IR8).

Information on how to use the FLEX I/O 8 Input RTD Module

(Catalog No. 1794-IR8).

Information on how to use the Thermocouple and Millivolt Input Module

(Catalog No. 1794-IT8).

Information on how to install the Thermocouple/Millivolt Input Modules

(Catalog No. 1794-IRT8, 1794-IRT8K, 1794-IRT8XT).

Information on how to install the 2-Input Frequency Module

(Catalog No. 1794-IJ2, 1794-IJ2K, 1794-IJ2XT).

Information on how to use the FLEX I/O Frequency Input Module

(Catalog No. 1794-IJ2).

Information on how to install the 24V FLEX I/O 2 Channel Incremental Encoder

Module (Catalog No. 1794-ID2).

Information on how to install the FLEX Integra Analog Module (Catalog No.

1793-IE2X0E1,1793-IE2XOE1S, 1793-IE4, 1793-IE4S, 1793-OE2, 1793-OE2S).

Information on how to install the 24V DC FLEX I/O 4-Channel Module

(Catalog No. 1794-IP4).

Information on how to install the Very High Speed Counter Module

(Catalog No. 1794-VHSC).

Information on how to install the FLEX I/O 48V DC Input and Output Modules

(Catalog No. 1794-IC16, 1794-OC16).

Information on how to install the FLEX I/O AC Input Modules

(Catalog No. 1794-IA8, 1794-IA8I, 1794-IA16).

Information on how to install the FLEX I/O Digital AC Output Modules

(Catalog No. 1794-OA8, 1794-OA8K, 1794-OA8I, 1794-OA16).

Information on how to install the FLEX I/O 220V AC Input and Output Modules

(Catalog No. 1794-IM8, 1794-OM8).

Information on how to install the FLEX I/O Terminal Base Units

(Catalog No. 1794-TB2, 1794-TB3, 1794-TB3K, 1794-TB3S, 1794-TB32,

1794-TB3G, 1794-TB3GK, 1794-TB3GS, 1794-TB3T, 1794-TB3TS, 1794-TBN,

1794-TBNK, 1794-TBNF).

Interconnect Cable Installation Instructions, publication 1794-5.12

x xxxxxxxxxxxxx

Information on how to install the Interconnect Cable

(Catalog No. 1794-CE1, 1794-CE3).

Publication 1794-6.5.12 - September 2011

xii

Preface

Resource

FLEX I/O DC Power Supply Installation Instructions, publication 1794-IN069 x xxxxxxxxxxxxx

Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1

x xxxxxxxxxxxxx

Rockwell Automation Industrial Automation Glossary,

AG-7.1

x xxxxxxxxxxxxx

Description

Information on how to install the FLEX I/O DC Power Supply

(Catalog No. 1794-PS13, 1794-PS3).

In-depth information on grounding and wiring Allen-Bradley programmable controllers.

A glossary of industrial automation terms and abbreviations.

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.

• Italic type is used for emphasis.

Publication 1794-6.5.12 - September 2011

1

Overview

The FLEX System

Adapter

Chapter

1

Overview of FLEX I/O and Your Thermocouple,

RTD, and Millivolt Input Module

This chapter provides a description of the FLEX I/O Thermocouple, RTD, and Millivolt Input module and an overview of how it communicates with programmable controllers.

Topic

The FLEX System

Types of Modules

What the FLEX I/O Input Module Does

The FLEX I/O Module in a Logix Control System

Physical Features of Your Module

Chapter Summary

3

4

2

2

5

Page

1

FLEX I/O is a small, modular I/O system for distributed applications that performs all of the functions of rack-based I/O. The FLEX system contains the following components shown below:

Terminal base I/O module

2

+

2

+

1794-IRT8

45374

• Adapter – transfers read and write configuration data to and from the

I/O module

• Terminal base – contains a terminal strip to terminate wiring for two- or three-wire devices

• I/O module – contains the bus interface and circuitry needed to perform specific functions related to your application

Publication 1794-6.5.12 - September 2011

2

Overview of FLEX I/O and Your Thermocouple, RTD, and Millivolt Input Module

The FLEX system consists of an adapter module, terminal base unit, DIN rail, power supply, and adapter cabling components. You can use up to 8 terminal bases per adapter module.

For detailed instructions on how to set up and install your module, refer to the topic, Install Your FLEX I/O Input Module, on page 7.

Types of Modules

The module refer to the following catalogs.

Catalog No.

Voltage Inputs

1794-IRT8 24V DC 8

1794-IRT8K 24V DC 8

1794-IRT8XT 24V DC 8

Description

Analog – 8-pt, 16 bit non-isolated RTD, thermocouple and mV Input module

Analog – 8-pt, 16 bit non-isolated RTD, thermocouple and mV Input module.

Conformally coated module.

Analog – 8-pt, 16 bit non-isolated RTD, thermocouple and mV Input module designed for extended temperature.

The module accepts up to 8 thermocouple or RTD inputs. The inputs are nonisolated and are selected with analog multiplexers. The inputs accept millivolt or resistive inputs. Default input spans are -40.00 mV… +100.00 mV or 0.0…500.0

Ω . Fault indicators are located on the field side.

No switches or jumpers are used on the TC and RTD Input module. The inputs have both fixed hardware filters and selectable firmware digital filters.

What the FLEX I/O Input

Module Does

The module is a high-speed, high-accuracy temperature and millivolt measuring module that accepts thermocouple inputs, 2-, 3-, and 4-wire RTD inputs, and mV source inputs.

It offers the following:

• wire-off, over-range, and under-range detection

• good common mode rejection

• usage with long thermocouple wiring

• usage with grounded or ungrounded thermocouples

The Series B version of 1794-IRT8 provides capability to work with grounded thermocouples.

Use cold junction compensators (cat. no. 1794-CJC2) in thermocouple mode.

Two cold junction compensators are shipped with the 1794-IRT8.

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Overview of FLEX I/O and Your Thermocouple, RTD, and Millivolt Input Module

3

The FLEX I/O Module in a

Logix Control System

The FLEX I/O Thermocouple, RTD, and Millivolt modules are intelligent modules that interface analog signals with Rockwell Automation programmable controllers through a FLEX I/O adapter module.

The adapter transfers data to and from the module. These transfers allow:

• the adapter to obtain input or output values and status from the module

• the user to establish the mode of operation through a process called configuration

The following illustration shows the flow of communication between the adapter and the I/O module.

Typical Communication Between the Adapter and a Module

1794-ACN15

1794-ACNR15

1794-ACNR15K

1794-ADN

1794-AENT

1794-APBDPV1

1794-ASB

1794-APB

Adapter

1794-AENT shown

1

The adapter transfers your configuration data.

2

External devices transmit analog signals to the module.

FlexBus

4

The adapter receives data from the modules and stores it in the data table.

1794-IRT8

TC RTD INPUT 8 CHANNEL

IN 0

F

IN 1

F

IN 2

F

IN 3

F

IN 4

F

IN 5

F

IN 6

F

IN 7

F

3

PWR

5

The adapter module determines that the transfer was made without error and input values are within specified range.

6

Your ladder program can use and/or move the data (if valid) before it is overwritten by the transfer of new data in a subsequent transfer.

7

New configuration data can be sent to the module any time during operation.

3

The module converts analog signals into binary format and stores these values until the adapter requests their transfer.

45316

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4

Overview of FLEX I/O and Your Thermocouple, RTD, and Millivolt Input Module

Ethernet

A broader view of how the FLEX I/O module interfaces with the different elements in a Logix system is shown in the sample illustration below.

PC running controller and

Rockwell Automation configuration software

Panel

V iew

S tation

FLEX System

1794 adapter

1794 FLEX I/O module

Bridge

45567

.

In this example, the FLEX I/O module communicates with the controller through the adapter. The controller can produce and consume tags. It can initiate MSG instructions that send and receive data or configure devices.

Configuration of devices and the network is done through the personal computer running the controller and configuration software.

To learn the prerequisites and steps to configure your FLEX I/O module using RSLogix 5000 software, see Configure Your FLEX I/O Module with

RSLogix 5000 Software on page 21.

ATTENTION

The following publications provide more information about

EtherNet/IP, and ControlNet modules in a Logix5000 system:

•EtherNet/IP Modules in Logix5000 Control Systems, publication ENET-UM001

•ControlNet Modules in Logix5000 Control Systems, publication CNET-UM001

Physical Features of Your

Module

The module label identifies the keyswitch position, wiring and module type. A removable label provides space for writing individual designations per your application. Indicators are provided to identify input fault conditions, and to show when power is applied to the module.

Publication 1794-6.5.12 - September 2011

Chapter Summary

Overview of FLEX I/O and Your Thermocouple, RTD, and Millivolt Input Module

5

Module Label and Indicators

1794-IRT8

1794-IRT8

TC RTD INPUT 8 CHANNEL

IN 0

F

IN 1

F

IN 2

F

IN 3

F F

IN 4

Input designators

IN 5

F F

IN 6 IN 7

F

P

W

R

3

Module type

Removable label

Keyswitch position indicator (#3)

Power on indicator

45317

In this chapter, you were introduced to the FLEX I/O system and the

Thermocouple, RTD, and mV input module, and how it communicates with programmable controllers.

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6

Overview of FLEX I/O and Your Thermocouple, RTD, and Millivolt Input Module

Notes:

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7

Chapter

2

Install Your FLEX I/O Input Module

Overview

This chapter provides you with pre-installation requirements and instructions on how to install your FLEX I/O Thermocouple, RTD, and Millivolt Input module.

Topic

Before You Install Your Module

Series A and Series B

Power Requirements

Install the Module

Mount on a DIN Rail

Mount on a Panel or Wall

Mount the FLEX I/O Module on the Terminal Base Unit

Wiring Information

Chapter Summary

13

14

16

20

Page

7

8

8

10

10

Before You Install Your

Module

Before installing your FLEX I/O Thermocouple, RTD, and mV module, you need to:

• verify that a suitable enclosure is available for installation of the module, and

• position the keyswitch on the terminal base.

ATTENTION

These modules do not receive primary operational power from the backplane. 24V DC power must be applied to your module before installation. If power is not applied, the module position may appear to the adapter as an empty slot in your chassis.

ATTENTION

If using a Series B product to replace a Series A product, connect a wire between terminals 39 and 48 on the 1794-TB3G or 1794-TB3GS terminal base unit. If not connected, the Series B product defaults to

Series B functionality.

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Install Your FLEX I/O Input Module

Power Requirements

Series A and Series B

The table, Series A and Series B Differences, describes the differences between

Series A and Series B of the FLEX I/O Thermocouple, RTD, and mV Input modules.

Series A and Series B Differences

Mode 1794-IRT8 Series A

Isolation

Common Mode Range

Thermocouple Mode

Wire-off Detection

Between user side and system side

+4V DC

When an open sensor is detected, data defaults to maximum value

1794-IRT8, 1794-IRT8XT

Series B

Between user 24V DC and user I/O; between user side and system side

+15V DC

When open sensor is detected, data defaults to minimum value

ATTENTION

In the RSLogix 5000 software, if using a series B product to replace a series A product, the module will be accepted without an electronic key mismatch warning.

This is true for 1794-IRT8 and 1794-IRT8XT modules installed on

Ethernet/IP, ControlNet, or Remote I/O networks.

ATTENTION

The CJC Status bit, Read Word 9, Bit 3 is added with the Firmware C release of the 1794-IRT8 Series B module.

The CJC Status bit is turned On when the temperature between the

CJCs is greater than 6 °C but less than 12 °C.

When this temperature difference is above 12 °C, then the CJC Alarm bits are set.

Also, if a CJC temperrature is over-range or under-range, then the associated CJC Alarm bit is set. In this condition, the CJC Status bit is not set.

The CJC Status bit did not exist in Series A.

The wiring of the terminal base unit is determined by the current draw through the terminal base. Make certain that the current draw does not exceed 10 A.

ATTENTION

Total current draw through the terminal base unit is limited to 10 A.

Separate power connections may be necessary.

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Install Your FLEX I/O Input Module

9

ATTENTION

Do not daisychain power or ground from the terminal base unit to any

AC or DC digital module terminal base unit.

Methods of wiring the terminal base units are shown in the illustration below.

Daisychain

TC/RTD/mV

Module

TC/RTD/mV

Module

TC/RTD/mV

Module

Analog

Module

Individual

24V DC

Wiring when total current draw is less than 10 A

Digital Input

Module

TC/RTD/mV

Module

Digital Input

Module

Digital Output

Module

24V DC

24V DC

24V DC

Wiring when total current draw is less than 10 A

Thermocouple, RTD, Millivolt wiring separate from digital wiring.

Combination

Analog

Module

Analog

Module

TC/RTD/mV

Module

Analog

Module

24V DC

24V DC

Total current draw through any base unit must not be greater than 10 A

45318

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10

Install Your FLEX I/O Input Module

Install the Module

ATTENTION

Note the following considerations for each type of wiring configuration:

• Daisychain – AIl modules must be analog or TC, RTD, and mV modules for this configuration.

• Individual – Use this type of of configuration for any "noisy" DC digital I/O modules in your system.

• Combination – All modules powered by the same power supply must be analog or TC, RTD, and mV modules for the combination type of configuration.

Installation of the FLEX I/O module consists of:

• mounting the terminal base unit

• installing the TC, RTD, and mV module into the terminal base unit

• installing the connecting wiring to the terminal base unit

If you are installing your module into a terminal base unit that is already

installed, proceed to the section, Mount the FLEX I/O Module on the

Terminal Base Unit, on page 14.

Mount on a DIN Rail

ATTENTION

Do not remove or replace a terminal base unit when power is applied.

Interruption of the FlexBus can result in unintended operation or machine motion.

Install the Terminal Base Unit

1.

Remove the cover plug in the male connector of the unit to which you are connecting this terminal base unit.

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Install Your FLEX I/O Input Module

11

2.

Check to make sure that the 16 pins in the male connector on the adjacent device are straight and in line so that the mating female connector on this terminal base unit will mate correctly.

7

8

9

6

0

1

2

3

4

7

2

+

2

+

45319

Make certain that the female FlexBus connector is fully retracted into the base unit.

3.

Position the terminal base at a slight angle and hooked over the top of the 35 x 7.5 mm DIN rail A (Allen-Bradley part number 199-DR1;

46277-3).

2

+

2

+

45320

4.

Slide the terminal base over tight against the adapter, or proceeding terminal base. Make sure the hook on the terminal base slides under the edge of the adapter, or proceeding terminal base, and the FlexBus connector is fully retracted.

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12

Install Your FLEX I/O Input Module

5.

Rotate the terminal base onto the DIN rail with the top of the rail hooked under the lip on the rear of the terminal base.

Use caution to make sure that the female FlexBus connector does not strike any of the pins in the mating male connector.

6.

Press down on the terminal base unit to lock the terminal base on the

DIN rail. If the terminal base does not lock into place, use a screwdriver or similar device to open the locking tab, press down on the terminal base until flush with the DIN rail and release the locking tab to lock the base in place.

2

+

2

+

45321

Gently push the FlexBus connector into the side of the adapter, or proceeding terminal base, to complete the backplane connection.

Publication 1794-6.5.12 - September 2011

2

+

2

+

45322

For specific wiring information, refer to the installation instructions for the module you are installing in this terminal base unit.

7.

Repeat the above steps to install the next terminal base unit.

Ensure that the cover of the FlexBus connector on the last terminal base unit is in place.

Install Your FLEX I/O Input Module

13

Mount on a Panel or Wall

Installation of a FLEX system on a wall or panel consists of:

• laying out the drilling points on the wall or panel.

• drilling the pilot holes for the mounting screws.

• mounting the adapter mounting plate.

• installing the terminal base units and securing them to the wall or panel.

If you are installing your module into a terminal base unit that is already

installed, proceed to the section, Mount the FLEX I/O Module on the

Terminal Base Unit, on page 14.

Use the mounting kit Cat. No. 1794-NM1 for panel or wall mounting.

35.5

(1.4)

Millimeters

(Inches)

1

4

2

8

9

7

6

0

1

4

2

3

7

2

+

2

+

3

45323

1

2

Description

Mounting plate for adapter

#6 Self-tapping screws

3

4

To install the mounting plate on a wall or panel:

Description

Terminal base unit (not included)

Adapter module (not included)

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14

Install Your FLEX I/O Input Module

Millimeters

(Inches)

21 (0.83)

1.

Lay out the required points on the wall or panel as shown in the drilling dimension drawing.

Drilling Dimensions for Panel or Wall Mounting

35.5

(1.4)

58.5

(2.3)

35.5

(1.4)

58.5

(2.3)

35.5

(1.4)

Publication 1794-6.5.12 - September 2011

45327

2.

Drill the necessary holes for the #6 self-tapping mounting screws.

3.

Mount the mounting plate for the adapter module using two #6 self-tapping screws – 18 screws included for mounting up to 8 modules and the adapter.

IMPORTANT

Make certain that the mounting plate is properly grounded to the panel. Refer to Industrial Automation Wiring and Grounding

Guidelines, publication 1770-4.1

.

4.

Hold the adapter at a slight angle and engage the top of the mounting plate in the indention on the rear of the adapter module.

5.

Press the adapter down flush with the panel until the locking lever locks.

6.

Position the terminal base unit up against the adapter and push the female bus connector into the adapter.

7.

Secure to the wall with two #6 self-tapping screws.

8.

Repeat for each remaining terminal base unit.

Mount the FLEX I/O Module on the Terminal Base Unit

The Thermocouple, RTD, and mV input module mounts on a 1794-TB3G or

1794-TB3GS terminal base unit.

Install Your FLEX I/O Input Module

15

1.

Rotate keyswitch (3) on terminal base unit (4) clockwise to position 3 as required for the module.

Do not change the position of the keyswitch after wiring the terminal base unit.

1

2

3

4

5

6

8

7

40231

Label here or under here

Description

1 FlexBus connector

2 Latching mechanism

3 Keyswitch

4 Cap plug

Description

5 Base unit

6 Alignment groove

7 Alignment bar

8 Module

2.

Make certain the FlexBus connector (1) is pushed all the way to the left to connect with the neighboring terminal base or adapter.

You cannot install the module unless the connector is fully extended.

3.

Make sure the pins on the bottom of the module are straight so they will align properly with the connector in the terminal base unit.

ATTENTION

If you remove or insert the module while the backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding.

4.

Position the module (8) with its alignment bar (7) aligned with the groove (6) on the terminal base.

5.

Press firmly and evenly to seat the module in the terminal base unit.

The module is seated when the latching mechanism is locked into the module.

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16

Install Your FLEX I/O Input Module

6.

Remove cap plug and attach another terminal base unit to the right of this terminal base unit if required.

Make sure the last terminal base has the cap plug in place.

IMPORTANT

The adapter is capable of addressing eight modules. Do not exceed a maximum of eight terminal base units in your system.

Wiring Information

Wiring the module is done using the 1794-TB3G, 1794-TB3GK or the

1794-TB3GS terminal base units.

1794-TB3G, 1794-TB3GK and 1794-TB3GS Wiring

1794-TB 3 G o r 1794-TB 3 GK

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

1794-TB 3 GS

0

16

34

1

17

2 3 4 5 6 7 8

18 19 20 21 22 23

9 10 11 12 13 14 15

24 25 26 27 28 29 30 31 32

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

33

51

Label placed at top of wiring area

A 0...15

A

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

B 16...33

B

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

C 34...51 C

34 and 50 = 24V DC

35 and 51 = common

16 and 33 = chassis

40…45 = chassis ground

35 and 51 = common

34 and 50 = 24V DC

16 and 33 = chassis ground

40…45 = chassis ground

45328

Connect Wiring to the FLEX I/O Module

Wiring to the TC, RTD, and mV module is made through the terminal base unit on which the module mounts.

The module is compatible with the 1794-TB3G, 1794-TB3GK and

1794-TB3GS terminal base units.

Connecting Wiring Using a 1794-TB3G, 1794-TB3GK or 1794-TB3GS

Terminal Base Unit

1.

Connect individual signal wiring to numbered terminals on 0…15 row

(A), and 17…32 row (B), on the terminal base unit as indicated in the table below. Use Belden 8761 cable for mV signal wiring, or the appropriate thermocouple wire for your thermocouples.

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Install Your FLEX I/O Input Module

17

Signal wiring shields can be connected to terminals 16 or 33 on row B or terminals 40…45 on row C.

2.

Connect the +V DC power lead to terminal 34 on row C, terminals

34…51.

3.

Connect the -V DC common (return-) to terminal 35 on row C, terminals 34…51.

ATTENTION

Do not daisychain power or ground from this terminal base unit to any

AC or DC digital module terminal base units.

4.

If daisychaining power to the next terminal base unit, connect a jumper from terminal 50 (+V DC) on this base unit to +V terminal on the next terminal base unit.

5.

Connect a jumper from terminal 51 (-V DC common) to the -V DC common terminal on the next terminal base unit.

6.

If using cold junction compensators, make these connections as shown in the CJC Sensor chart below.

Identify RTD Wire Pairs

If the RTD wires are color-coded, the wires that are the same color are connected together. If the wires are not color-coded, use an ohmmeter to determine the pairs as explained below.

How to Connect a 4-wire RTD

If the 4-wire RTD wires are all different colors, use an ohmmeter to determine which leads are connected together. One of the leads in each pair is the compensation lead. Either lead of the pair can be the compensation lead.

Attach one pair to terminals L and - and the other pair to + and H.

How to Connect a 3-wire RTD

If the 3-wire RTD wires are all different colors, use an ohmmeter to determine which leads are connected together. Either lead of the pair can be the compensation lead. Attach one lead of the pair to terminal L and the other to

+. Attach the single lead to -.

Refer to the table, Wiring Connections for the FLEX I/O Input Module, on page 18.

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18

Install Your FLEX I/O Input Module

RTD

The r moco u ple

Millivolt

+ mV

-

2-wi r e

3 -wi r e

1

3

2

1

2

4-wi r e

1

1a

2a

2

1

2

1

2

45332

Wiring Connections for the FLEX I/O Input Module

Input types

RTD – 2-wire

RTD – 3-wire

RTD – 4-wire

Thermocouple

Millivolt

Connect the following:

H

1a

L

3

2a

1

1

+

1

1

1

-

2

2

2

2

2

Shield

(1)

(1) Terminals 37, 38 and 39 and 46, 47 and 48 are for cold junction compensation, with 38 and 47 as chassis GND.

45359

Input

CJC1

CJC2

CJC Sensor

+

C-37

C-46

Chassis

Ground

C38

C47

-

C39

C48

CJC Tail

(1)

A-5 (B-22)

A-12 (B-29)

(1) Terminals 37, 38, and 39, and 46, 47, and 48 are for cold junction compensation, with 38 and 47 as chassis GND. Connect the tail of CJC1 to terminal 5 and CJC2 to terminal 12 if channels 0…3 or 0…7 are configured for thermocouples. Connect the tail of CJC1 to terminal 22 and CJC2 to 29 if channels 4…7 are configured for thermocouples.

Terminal Base Unit Wiring Connections

RTD or TC

Channel

1794-TB3G, 1794-TB3GK, and 1794-TB3GS Terminal

Base Units

(1)

High Signal

Terminal (H)

6

7

4

5

2

3

0

1

A-1

A-5

A-9

A-13

B-18

B-22

B-26

B-30

+24V DC Power 34 and 50

24V DC Common 35 and 51

Low

Signal

Terminal (L)

A-2

A-6

A-10

A-14

B-19

B-23

B-27

B-31

RTD Source

Current (+)

A-0

A-4

A-8

A-12

B-17

B-21

B-25

B-29

Signal

Return (-)

B-20

B-24

B-28

B-32

A-3

A-7

A-11

A-15

(1) Terminals 37, 38, and 39, and 46, 47 and 48 are for cold junction compensation. Terminals 16, 33 and 40…45 are chassis ground. Connect tail of CJC1 to terminal 5 and CJC2 to 12 if channels

0…3 or 0…7 are thermocouples. Connect tail of CJC1 to terminal 22 and CJC2 to 29 only

if channels 4…7 are used.

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Install Your FLEX I/O Input Module

19

IMPORTANT

Disconnecting and reconnecting RTDs or CJCs with power applied temporarily disturbs the channel steady state data. Allow 2 minutes for settling time after finishing connections.

IMPORTANT

If using RTD isolators, use 2- or 4-wire configurations only, and add digital filtering to the inputs.

Example of 2-, 3- and 4-wire RTD and Thermocouple Wiring to a 1794-TB3G

Terminal Base Unit

Thermocouple Channel 4

1

+

2

-

2-Wire RTD Channel 1

1

2

3-Wire RTD Channel 2

1

3

2

4-Wire RTD Channel 3

1

1a

2a

2

0

0

1

1

2

2

3

3

4

4 5

5 6

6

7

7 8

8 9

9 10 11 12 13 14 15

10 11 12 13 14 15

16

34

17 18

35 36

19 20

37 38

21

39

22 23

40 41

24

42

25 26

43 44

27

45

28 29

46 47

30

48

31

49

32 33

50 51

0...15

A

16...33

B

34...51 C

1794-TB 3 G

CJC

45329

ATTENTION

Keep exposed area of inner conductor as short as possible.

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Install Your FLEX I/O Input Module

Chapter Summary

Example of Millivolt Wiring to a 1794-TB3G Terminal Base Unit

Millivolt

Source

+ -

+

Millivolt

Source

-

+

Millivolt

Source

-

+

Millivolt

Source

-

16

0

0

1

1 2 3 4

2 3 4 5

5 6 7 8 9 10 11 12 13 14 15

6 7 8 9 10 11 12 13 14 15

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

33

51

0...15

16...33

A

B

34...51 C

45330

This chapter provided the user with installation prerequisites and instructions for the FLEX I/O Input module in an existing programmable controller system. It also provided the user with instructions on how to wire to a terminal base unit.

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21

Chapter

3

Configure Your FLEX I/O Module with

RSLogix 5000 Software

Overview

Add and Configure the

FLEX I/O Module

This chapter describes how to configure the FLEX I/O Thermocouple, RTD, and mV module for the ControlLogix and CompactLogix system using the

RSLogix 5000 software. The 1794-IRT8 module can communicate through different networks such as ControlNet, Ethernet, Profibus, among others. In the examples below, the Ethernet adapter is used for communication between the Logix processor and the FLEX I/O bus.

ATTENTION

If using an SLC controller with ControlNet, refer to the associated I/O scanner documentation.

If using a PLC 5 controller, refer to the PLC 5 controller documentation for ControlNet configuration information.

You need to follow these series of steps to fully configure your FLEX I/O module in the RSLogix 5000 software.

1.

Add and configure the new local bridge module, such as 1756-ENBT, to your project. This user manual assumes you have already properly configured this module. Refer to the associated documentation.

2.

Add and configure the new adapter module, such as a FLEX I/O

EtherNet Adapter (1794-AENT). This user manual assumes you have already properly configured this module. Refer to the associated documentation.

3.

Add and configure your FLEX I/O module. See the steps provided below.

4.

Download the configuration to the controller.

To be able to add your FLEX I/O Thermocouple, RTD, mV module, you should have already added and configured your Ethernet bridge and/or adapter.

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22

Configure Your FLEX I/O Module with RSLogix 5000 Software

1.

In the I/O Configuration tree, right-click the 1794-AENT adapter, and select New Module.

Right-click the local adapter module.

Select New Module.

2.

The Select Module dialog appears. Select the FLEX I/O module and click OK.

Publication 1794-6.5.12 - September 2011

3.

Complete the following fields in the New Module dialog that appears.

Click OK.

• Name

• Description

• Comm Format

• Electronic Keying

Configure Your FLEX I/O Module with RSLogix 5000 Software

23

4.

Click the Connection tab. Specify a value for the Requested Packet

Interval (RPI).

5.

Click the Module Info tab to see Module Identification and Status information. These fields are populated when the module goes online.

6.

Click the Input Configuration tab and specify the values for the following fields:

• Channel

• Sensor

• Sensor Mode

• Input Filter Cutoff

• Data Format

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Configure Your FLEX I/O Module with RSLogix 5000 Software

Configuration Parameters

Field Name

Sensor

Sensor Type

Description

Allows you to select the main sensor function of your module, whether Thermocouple or RTD.

You will need to configure your module based on this main configuration by specifying the next parameters.

Allows you to select one of nine thermocouple types or one of eight RTD types. Default unit is mV for thermocouples and ohms for RTDs.

Configuration Options

Thermocouple

RTD

For Thermocouple mV

Type B

Type E

Type J

Type K

Type TXK/XKL(L)

Type N

Type R

Type S

Type T

For RTD

Resistance

100 ohm Pt 385

200 ohm Pt 385

100 ohm Pt 3916

200 ohm Pt 3916

100 ohm Ni 618

200 ohm Ni 618

120 ohm Ni 672

10 ohm Cu 427

To help you select the proper operating range of your thermocouple, see Resolution Curves for Thermocouples, on page 65.

To help you specify the value for your RTD, see

Sensor Types, on page

29.

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25

Configuration Parameters

Field Name

Sensor Mode

Description

Allows you to select the operational mode for the thermocouple or RTD inputs. For thermocouple inputs, you can choose the cold junction compensation mode.

For RTD inputs, you can choose 2-wire, 2-wire with user selected RTD offset, 3-wire, and 4-wire.

Default for thermocouples is external compensation; default for RTDs is 2-wire (with no offsets).

Configuration Options

For Thermocouple

External compensation

Internal compensation

No compensation

Differential compensation

For RTD

2-wire compensation (default)

2-wire with Loop compensation

3-wire

4-wire

For a description of the different sensor mode options, for both

Thermocouple and RTD,

see Bit/Word

Descriptions for Block

Transfer Write Words, on page 34.

When you select

Internal Compensation for your Thermocouple, you need to specify a corresponding

Reference Junction value. This parameter sets a fixed reference junction to compensate all thermocouple channels and ranges from 0 °C…70 °C.

When you select 2-wire with Loop compensation for your RTD, you need to specify values for each channel for the

RTD Loop

Compensation.

Input Filter Cutoff Allows you to select one of eight levels on input filtering. The single pole, low pass filtering is accomplished by the module microprocessor. The filter selections range from Hardware Only to 5 s time constant. The times are approximate because they are based on the module scan time, which varies. The default is Hardware Only.

Data Format Allows you to specify the format of the data reported.

Module defaults to -4000…10000 in millivolt mode, and 0…5000 in Ω

(i.e. -40.00mV, 0.1

mode with implied decimal points

Ω ) whenever °C, °F, °K is selected.

Hardware Filter Only (default)

25 ms

100 ms

250 ms

500 ms

1 s

2 s

5 s

°C

°F

°K

-32767…32767

0…65535

7.

After you have completed all the Module Configuration parameters, click OK in the Module Properties dialog box.

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Configure Your FLEX I/O Module with RSLogix 5000 Software

You should see the FLEX I/O module in the I/O Configuration tree.

Chapter Summary

To be able to check if your configured parameters are acceptable and the configuration is successful, you need to go online.

Refer to the RSLogix 5000 Online Help for detailed descriptions of the configuration parameters.

This chapter provided instructions and required parameters for setting up your

FLEX I/O module on an EtherNet/IP network.

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Chapter

4

Read and Write Configuration Maps for the

FLEX I/O Module

Overview

This chapter describes how to configure, read data from, and map data to your

FLEX I/O Thermocouple, RTD, and mV Input module.

Topic

Configure Your Input Module

Configurable Options and Their Effect on the Channels

Sensor Types

Read Data From the Module

Map Data for the Module

Using Series A Functionality in a Series B Module

Chapter Summary

Page

30

38

38

27

27

29

30

Configure Your Input

Module

The Thermocouple, RTD, and mV input module is configured using a group of data table words mapped by the processor that is used when the connection to the module is established.

The software configurable features available are:

• input range selection

• selectable single pole low pass filter

• data reported in °F, °C, °K, mV, Ω , unipolar or bipolar count

• fault detection

Configurable Options and

Their Effect on the

Channels

There are two types of configurable options: those that affect all channels, and those that affect each group of 4 input channels.

Options that Affect All Channels

Input Filter Selection

This combination of bits allows you to select one of eight levels on input filtering. The single pole, low pass filtering is accomplished by the module

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28

Read and Write Configuration Maps for the FLEX I/O Module microprocessor. The filter selections range from Hardware Only to 5 s time constant. The times are approximate because they are based on the module scan time, which varies. The default is Hardware Only.

Data Format Selection

This set of bits allows you to select one of these five formats:

• Degree C

• Degree F

• Degree K

• Unipolar – The end points for Unipolar are scaled to the end points of the thermocouple or RTD range. The default unit is mV.

• Bipolar – The end points for Bipolar are scaled to the end points of the thermocouple or RTD range. It uses Ω as default unit.

Options that Affect Each Group of Four Inputs

Sensor Type

This set of bits allows you to select one of nine thermocouple types or one of eight RTD types. Default unit is mV for thermocouples and ohms for RTDs.

Sensor Mode

This set of bits allows you to select the operational mode for the thermocouple or RTD inputs. For thermocouple inputs, you can choose the cold junction compensation mode: internal, external, no CJC and differential measurement between 2 channels, for example, the value of channel 0 minus the value of channel 1 appears in the channel 0 and channel 1 data table locations. For RTD inputs, you can choose 2-wire, 2-wire with user selected

RTD offset, 3-wire, and 4-wire. Default for thermocouples is external CJC; default for RTDs is 2-wire (with no offsets).

Input Types

This set of bits allows you to select one of two input types: thermocouple

(millivolt) or RTD (resistance). The default input type is thermocouple.

Reference Junction

These bits allow you to select from seven fixed temperatures for the CJC value that is used by the module in thermocouple mode. Use this mode when the ambient temperature surrounding the thermocouple connection point is known and steady. The default temperature is 0 °C (32 °F).

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Read and Write Configuration Maps for the FLEX I/O Module

29

Sensor Types

Fault Mode

You can enable or disable the fault detection. When enabled in thermocouple mode, each channel is monitored for an open circuit. If an open is detected, the overrange and fault bits are set for that channel, and the channel data is set to the maximum value (Series A), or minimum value (Series B) for the chosen mode of operation.

When enabled in RTD mode, each channel is monitored for an open circuit

(RTD and wires) and short circuits (RTD). If an open is detected, the overrange and fault bits are set for that channel, and the channel data is set to the maximum value for the chosen mode of operation. If a short is detected, the underrange bits is set for that channel, except when in Ω mode. The channel data is set to the minimum value for the chosen mode of operation.

RTD Offset

You can select from four fixed resistive values used by the module when inputs are configured for 2-wire with user selected RTD offset. The RTD offset is used to nullify the effects of the resistance of long lead wires. Each value represents the total resistance of both leads of a 2-wire RTD. For example, if you choose 5 Ω , the module compensates for a total of 5 Ω of lead resistance.

You can perform a calibration operation that measures the actual total lead resistance with RTD replaced with a short circuit. The value stored from this operation is used when the option Use Channel Loop Compensation Value is selected. This is also the default setting and is initially set to 0 at the factory.

Each channel has its own pair of RTD offset bits and a Channel Loop

Compensation value.

Individual input channels are configurable to operate with the following sensor types:

RTD Type

Sensor type for channels 0…3

Thermocouple Type

Sensor type for channels 0…3

Sensor type for channels 4…7

Resistance (default)

Sensor type for channels 4…7 mV (default)

100 Ω Pt α = 0.00385 Euro (-200 … +870 °C) (-328…1598 °F) B 300 … 1800 °C (572 … 3272 °F)

200 Ω Pt α = 0.00385 Euro (-200 … +400 °C) (-328…752 °F) E -270 … 1000 °C (-454 … 1832 °F)

100 Ω Pt α = 0.003916 U.S. (-200 … +630 °C) (-328…1166 °F) J -210 … 1200 °C (-346 … 2192 °F)

200 Ω Pt α = 0.003916 U.S. (-200 … +400 °C) (-328…752 °F) K -270 … 1372 °C (-454 … 2502 °F)

100 Ω Nickel α = 0.00618 (-60 … +250 °C) (-76…482 °F)

200 Ω Nickel α = 0.00618 (-60 … +200 °C) (-76…392 °F)

TXK/XK(L) -200

N -270 …

… 800 °C (-328

1300 °C (-450 …

… 1472 °F)

2372 °F)

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Read and Write Configuration Maps for the FLEX I/O Module

RTD Type

120 Ω Nickel α = 0.00672 (-80 … +320 °C) (-112…608 °F)

10 Ω Copper α = 0.00427 (-200 … +260 °C) (-328…500 °F)

Thermocouple Type

R -50 … 1768 °C (-58 … 3214 °F)

S -50 … 1768 °C (-58 … 3214 °F)

T -270 … 400 °C (-454 … 752 °F)

You select individual channel ranges using write word 1 of the block transfer write instruction.

ATTENTION

Disconnecting and reconnecting RTDs with power applied temporarily disturbs the steady state data of the channel. Allow 2 minutes for settling time or cycle power to the module after terminating connections.

ATTENTION

If using RTD isolators, we recommend using 2- or 4-wire configurations only and digital filtering to the inputs.

WARNING

The range -32768…32767 should only be used with mV selection.

Signals from a thermocouple or RTD are non-linear, the mV selection is not recommended for thermocouple or RTD real time readings.

If selected, the module will return the mV generated by the thermocouple or RTD, in addition to any offsets generated by wiring without any correction for the non-leanearity of the device.

Also, when the module is configured for mV the CJC compensation is not applied for thermocouple devices.

For thermocouples and RTDs you should use F or C data format. When configured as thermocouple or RTD the module will use an internal table to adjust for the non-linear mV returned by the field devices.

After the internal calculations are preformed the module will provide results in degrees F or C.

Read Data From the Module

Read programming transmits status and data from the TC and RTD input module to the processor data table in one I/O scan. The processor user program initiates the request to transfer data from the TC and RTD input module to the processor.

Map Data for the Module

The following read and write words and bit/word descriptions describe the information written to and read from the TC and RTD input module. The

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Read and Write Configuration Maps for the FLEX I/O Module

31 module uses up to 11 words of input data and up to 4 words of output data.

Each word is composed of 16 bits.

Thermocouple and RTD Input Module Image Table Mapping

I/O Image

Input S ize

1...11 Wo r ds

Output S ize

0...4 Wo r ds

Module Image

Input Data C hannel 0

Input Data C hannel 1

Input Data C hannel 2

Input Data C hannel 3

Input Data C hannel 4

Input Data C hannel 5

Input Data C hannel 6

Input Data C hannel 7

Ove rr ange

C hannel Faults

Unde

C J C S AB

EDT c ommand and data r esponse rr ange

Diagnosti c s

T C /RTD Mode

Data Fo r mat FM Refe r en c e J c t

S enso r Type T C /RTD Mode

RTD Offsets fo r ea c h c hannel

Filte r C ut

S enso r Type

EDT c ommand and data

45333

Block Transfer Read and Write

The following block transfer read and write word bit information is presented for experienced users only.

Input Map (Block Transfer Read)

Dec.

Oct.

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

15 14 13 12 11 10

17 16 15 14 13 12

Channel 0 Input Data

Channel 1 Input Data

Channel 2 Input Data

Channel 3 Input Data

Channel 4 Input Data

Channel 5 Input Data

09 08 07

11 10 07

06

06

05

05

04 03

04 03

02

02

01

01

00

00

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Read and Write Configuration Maps for the FLEX I/O Module

Input Map (Block Transfer Read)

Dec.

Oct.

Word 6

Word 7

Word 8

Word 9

Word 10

Where:

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01

17 16 15

Channel 6 Input Data

14 13 12 11

Ch Flt = Channel Fault

CJC = Cold Junction Compensation

SAB = Series of unit; 0 = Series A, 1 = Series B

Alm = Alarm

10

Channel 7 Input Data

Overrange Alarm Bits (channel 0 = bit 8, and so on.)

Ch 7

Flt

Resp

Flag

Ch 6

Flt

Ch 5

Flt

Ch 4

Flt

Command Response

Ch 3

Flt

Ch 2

Flt

Ch 1

Flt

Ch 0

Flt

07 06 05 04 03 02 01

Underrange Alarm Bits (channel 0 = bit 0, and so on.)

Res CJC2

Alm

Response Data

CJC1

Alm

SAB CJC

Status

Reserved

00

00

Output Map (Block Transfer Write)

Dec.

Oct.

Word 0

Word 1

Word 2

Word 3

Where:

15

17

14

16

Reserved

13

15

12

14

11

13

10

12

Data Format

09

11

08

10

07 06 05 04 03 02 01

07

Flt

Mode

Ch

4…7

TC/RTD

Ch 0…3

06

Flt

Mode

Ch

0…3

05 04

Reference Jct.

03

Sensor Mode

Ch 0…3

02 01

Filter Cutoff

Sensor Type

Ch 0…3

00

00

TC/RTD

Ch 4…7

Sensor

Mode

Ch 4…7

RTD Offset

Ch 7

Cmd

Flag

RTD Offset

Ch 6

EDT Command

Sensor Type

Ch 4…7

RTD Offset

Ch 5

RTD Offset

Ch 4

Flt = Fault

Ch = Channel

TC/RTD = Thermocouple/Resistance Temperature Detector

EDT = Extended Data Transfer

RTD Offset

Ch 3

RTD Offset

Ch 2

EDT Command Data

RTD Offset

Ch 1

RTD Offset

Ch 0

Bit/Word Descriptions for the Input Module Block Transfer Read Words

Word Dec. Bits

(Octal Bits)

Read Word 0 00…15

(00…17)

Read Word 1 00…15

(00…17)

Read Word 2 00…15

(00…17)

Description

Channel 0 Input data

Channel 1 Input data

Channel 2 Input data

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33

Read Word 3 00…15

(00…17)

Read Word 4 00…15

(00…17)

Read Word 5 00…15

(00…17)

Read Word 6 00…15

(00…17)

Read Word 7 00…15

(00…17)

Read Word 8 00…07

Read Word 9

08…15

(10…17)

00…03

04

05…06

07

08…15

(10…17)

Channel 3 Input data

Channel 4 Input data

Channel 5 Input data

Channel 6 Input data

Channel 7 Input data

Underrange bits – these bits are set if the input signal is below the minimum range of the input channel.

Bit 00 corresponds to channel 0…bit 07 corresponds to channel 7.

Overrange bits

– these bits are set if 1), the input signal is above the maximum range of the input channel; or 2), an input is disconnected.

Bit 08 (10) corresponds to channel 0, bit 09 (11) corresponds to channel 1, and so on.

Diagnostic bits – represent module configuration and/or hardware errors.

Bit 03 02 01 00

0 0 0 0 Reserved for factory use

0 0 1 0 Improper module configuration

0 1 1 0 RAM ault f

0 1 1 1 EEPROM fault

0001, 0100, and 0011…1111 Reserved for factory use

Series of Unit (SAB) – 0 = Series A, 1 = Series B

Cold junction compensation fault bits

– These bits are set (1) when the corresponding cold junction compensator lead is broken, unattached or shorted, and the thermocouple is set to "external compensation.” Bit 05 corresponds to CJC1, and bit

06 to CJC2.

Not used

Fault alarm bits – An alarm bit is set (1) when an individual input lead opens (broken, disconnected). If the alarm is enabled, the channel reads maximum value. Bit 08 (10) corresponds to input channel 0, bit

09 (11) to channel 1, and so on.

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Read and Write Configuration Maps for the FLEX I/O Module

Word Dec. Bits

(Octal Bits)

Read Word 10 00…07

08…14

(10…16)

15 (17)

Description

Extended data table data response bits – These bits echo the EDT command data written to the module during calibration.

Extended data table command response bits

–

These bits echo the EDT command written to the module during calibration.

Reserved for factory use

Bit/Word Descriptions for Block Transfer Write Words

Word Dec. Bits

(Octal Bits)

Write Word 0 00…02

Description

Bits 03…05

Bits 06…07

Bits 08…11

(10…13)

Input Filter Selection bits

Bit 02 01 00 Filter Time Constants – actual filtering depends on the module mode of operation

0 0 0 Hardware filtering only (default filtering)

0 0 1 25 ms

0 1 0 100 ms

0 1 1 250 ms

1 0 0 500 ms

1 0 1 1s

1 1 0 2 s

1 1 1 5 s

Reference Junction – used when input type is set to thermocouple and sensor mode is set to internal compensation. Sets a fixed reference junction to compensate all thermocouple channels.

Bit 05 04 03 Reference Junction

0 0 0 0 °C (32 °F)

0 0 1 20 °C (68 °F)

0 1 0 25 °C (77 °F)

0 1 1 30 °C (86 °F)

1 0 0 40 °C (104 °F)

1 0 1 50 °C (122 °F)

1 1 0 60 °C (140 °F)

1 1 1 70 °C (158 °F)

Fault Mode bits

– when a bit is set (1), fault mode is enabled for that channel. Bit 06 corresponds to channels 0…3; bit 07 corresponds to channels 4…7.

0 = Disabled

1 = Enable wire-off detection

Data format

– module defaults to -4000…10000 in millivolt mode, and 0…5000 in Ω mode with implied decimal points (i.e. -40.00mV, 0.1 Ω ) whenever °C, °F, °K is selected.

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35

Bit/Word Descriptions for Block Transfer Write Words

Word

Write Word 0

(continued)

Dec. Bits

(Octal Bits)

Bits 08…11

(10…13)

Bits 12…15

(14…17)

Write Word 1 Bits 00…03

Description

Bit 11 10 09 08

0 0 0 0

0 0 0 1

0 0 1 0

0 0 1 1

0 1 0 0

0101…1111 not used

Not used

Data type for channels 0…7

°C (implied decimal point xxxx.x)

°F (implied decimal point xxxx.x)

°K (implied decimal point xxxx.x)

-32767…+32767

0…65535

Bits 04…05

Sensor Type (Thermocouple or RTD)

RTD Type

Bit 03 02 01 00

0 0 0 0

0 0 0 1

0 0 1 0

0 0 1 1

0 1 0 0

0 1 0 1

0 1 1 0

0 1 1 1

1 0 0 0

1001…1111 not used

Sensor type for channels 0…3

Resistance (default)

100 Ω Pt α = 0.00385 Euro (-200…+870 °C) (-328…1598 °F)

200 Ω Pt α = 0.00385 Euro (-200…+400 °C) (-328…752 °F)

100 Ω Pt α = 0.003916 U.S. (-200…+630 °C) (-328…1166 °F)

200 Ω Pt α = 0.003916 U.S. (-200…+400 °C) (-328…752 °F)

100 Ω Nickel (-60…+250 °C) (-76…482 °F)

200 Ω Nickel (-60…+200 °C) (-76…392 °F)

120 Ω Nickel (-80…+320 °C) °F) (-112…608 °F)

10 Ω Copper (-200…+260 °C) °F) (-328…500 °F)

Thermocouple Type

Bit 03 02 01 00

0 0 0 0

0 0 0 1

0 0 1 0

0 0 1 1

0 1 0 0

0 1 0 1

0 1 1 0

0 1 1 1

1 0 0 0

1 0 0 1

1010…1111 not used

Sensor type for channels 0…3 mV (default)

B 300…1800 °C (572…3272 °F)

E -270…1000 °C (-454…1832 °F)

J -210…1200 °C (-346…2192 °F)

K -270…1372 °C (-454…2502 °F)

TXK/XK(L) -200…800 °C (-328…1472 °F)

N -270…1300 °C (-450…2372 °F)

R -50…1768 °C (-58…3214 °F)

S -50…1768 °C (-58…3214 °F)

T -270…400 °C (-454…752 °F)

Sensor Mode Select bits

Bit 05 04 Sensor mode select for channels 0…3

Thermocouple

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Read and Write Configuration Maps for the FLEX I/O Module

Bit/Word Descriptions for Block Transfer Write Words

Word Dec. Bits

(Octal Bits)

Description

Write Word 1

(continued)

Bits 06…07

Bits 08…11

(10…13)

Bits 08…11

(10…13)

0 0 External compensation – uses cold junction sensors. Both CJC sensors must be used when external compensation is selected.

0 1 Internal compensation – uses the user selected Reference Junction Selection.

1 0 No compensation. Data is referenced to 0 °C (32 °F).

1 1 Differential measurement between 2 channels (0…1, 2…3, 4…5, 6…7)

RTD

0 0 2-wire RTD no compensation

0 1 2-wire RTD with user selected RTD offset

1 0 3-wire RTD

1 1 4-wire RTD

Input Type Select

Bit 07 06 Input type selection for channels 0…3

0 0 Thermocouple

0 1 RTD

1 0 Not used

1 1 Not used

Sensor Type (Thermocouple or RTD)

RTD Type

Bit 11 10 09 08

0 0 0 0

0 0 0 1

0 0 1 0

0 0 1 1

0 1 0 0

0 1 0 1

0 1 1 0

0 1 1 1

1 0 0 0

1001…1111 not used

Sensor type for channels 4…7

Resistance (default)

100 Ω Pt α = 0.00385 Euro -200…+870 °C (-328…1598 °F)

200 Ω Pt α = 0.00385 Euro -200…+400 °C (-328…752 °F)

100 Ω Pt α = 0.003916 U.S. -200…+630 °C (-328…1166 °F)

200 Ω Pt α = 0.003916 U.S. -200…+400 °C (-328…752 °F)

100 Ω Nickel -60…+250 °C (-76…482 °F)

200 Ω Nickel -60…+200 °C (-76…362 °F)

120 Ω Nickel -80…+320 °C (-112…608 °F)

10 Ω Copper -200…+260 °C (-328…470 °F)

Thermocouple Type

Bit 11 10 09 08

0 0 0 0

0 0 0 1

0 0 1 0

0 0 1 1

0 1 0 0

0 1 0 1

0 1 1 0

0 1 1 1

1 0 0 0

Sensor type for channels 4…7 mV (default)

B 300…1800 °C (572…3272 °F)

E -270…1000 °C (-454…1832 °F)

J -210…1200 °C (-346…2192 °F)

K -270…1372 °C (-454…2502 °F)

TXK/XK(L) -200…800 °C (-328…1472 °F)

N -270…1300 °C (-450…2372 °F)

R -50…1768 °C (-58…3214 °F)

S -50…1768 °C (-58…3214 °F)

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Read and Write Configuration Maps for the FLEX I/O Module

37

Bit/Word Descriptions for Block Transfer Write Words

Word Dec. Bits

(Octal Bits)

Description

Write Word 2

Bits 12…13

(14…15)

Bits 14…15

(16…17)

00…15

(00…17)

1 0 0 1

1010…1111 not used

T -270…400 °C (-454…752 °F)

Sensor Mode Select bits

Bit 13 12 Sensor mode select for channels 4…7

Thermocouple

0 0 External compensation – uses cold junction sensors. Both CJC sensors must be used when external compensation is selected.

0 1

Internal compensation

– uses the user selected Reference Junction.

1 0 No compensation. Data is referenced to 0 °C (32 °F).

1 1 Differential measurement between 2 channels.

RTD

0 0 2-wire RTD no compensation

0 1 2-wire RTD with user selected offset

1 0 3-wire RTD

1 1 4-wire RTD

Input Type Select

Bit 15 14 Input type selection for channels 4…7

0 0 Thermocouple

0 1 RTD

1 0 Not used

1 1 Not used

RTD offset select bits

– used when input type is set to RTD and sensor mode select is set to 2-wire with user selected RTD offset. Allows you to set the type of RTD loop resistance compensation used for all RTDs or one of three fixed values for all channels.

NOTE:

Not applicable to 10 Ω copper RTD.

Bit 01 00 RTD Offset Select Bits – channel 0

03 02 RTD Offset Select Bits – channel 1

05 04 RTD Offset Select Bits – channel 2

07 06 RTD Offset Select Bits – channel 3

09 08 RTD Offset Select Bits – channel 4

11 10 RTD Offset Select Bits – channel 5

13 12 RTD Offset Select Bits – channel 6

15 14 RTD Offset Select Bits – channel 7

0 0 Use channel loop compensation value stored during calibration procedure for 2-wire

RTD (default = 0 Ω )

0 1 5 Ω (total lead resistance)

1 0 10 Ω (total lead resistance)

1 1 15 Ω

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Read and Write Configuration Maps for the FLEX I/O Module

Bit/Word Descriptions for Block Transfer Write Words

Word Dec. Bits

(Octal Bits)

Write Word 3 00…07

Description

08…14

(10…16)

15 (17)

Extended data table data bits – These bits are written to the module during calibration. They are used to define offset, gain and general channel calibration.

Extended data table command bits – These bits are written to the module during calibration. They are used to select channel calibration action.

Reserved for factory use only

Using Series A

Functionality in a

Series B Module

To employ Series A functionality when using a Series B 1794-IRT8 module, connect a wire from terminal 39 to terminal 48 on the 1794-TB3G or

1794-TB3GS terminal base unit. When terminals 39 and 48 are wired together, bit 4 in read word 9 will not be set (0), indicating the module is in Series A functionality.

ATTENTION

If these terminals are not connected together, the Series B product will default to Series B functionality.

Chapter Summary

This chapter provided the user with data and instructions to configure and map data for the FLEX I/O Thermocouple, RTD, and Millivolt Input module.

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Chapter

5

Calibrate Your Module

Overview

This chapter provides the tools and equipment, and procedure for calibrating your FLEX I/OThermocouple, RTD, and mV input module.

Topic

When and How to Calibrate Your FLEX I/O Module

Tools and Equipment

Calibrate Your Input Module

Calibration Setup

Wiring Connections for Calibrating the Thermocouple and RTD

Input Module

Read and Write Words for Calibration

EDT Calibration Command and Command Data Summary

Offset Calibration

Gain Calibration

Current Source Calibration

Cold Junction Calibration

Channel Loop Compensation Calibration

Chapter Summary

47

49

49

49

42

44

45

46

40

41

41

Page

39

40

When and How to

Calibrate Your FLEX I/O

Module

This module is shipped to you already calibrated. If a calibration check is required, the module must be in a FLEX system. We recommend recalibrating your module, if the module is going to be used in an environment with temperature other than 25 °C (77 °F) and 30% humidity.

ATTENTION

Perform module calibration periodically, based on your application, or at least once a year. Module calibration may also be required to remove module error caused by aging components in your system.

Offset calibration must be done first, followed by gain calibration.

39

IMPORTANT

You must use a 1794-TB3G or 1794-TB3GS terminal base when calibrating this module.

Calibration can be accomplished using the manual calibration procedure described in the following sections.

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Tools and Equipment

Calibrate Your Input

Module

To calibrate your Thermocouple, RTD, and mV input module, you will need the following tools and equipment:

Tool or Equipment

Industrial Terminal and

Interconnect Cable

Description

Precision Resistors High Precision Resistors:

383 W, 0.01%, 5ppm/°C

100 W, 0.01%, 5ppm/°C

10 K Ω , 0.5%, 5ppm/°C

Precision Voltage Source 320 mV, 1 μ V resolution Analogic 3100, Data Precision

8200 or equivalent

Programming terminal for Allen-Bradley family processors

ATTENTION

You must calibrate the module in a FLEX I/O system. The module must communicate with the processor and an industrial terminal. You can calibrate input channels in any order, or all at once.

IMPORTANT

To allow the internal module temperature to stabilize, apply power to the module at least 20 minutes before calibration.

When using remote I/O, before calibrating your module, you must enter ladder logic into the processor memory, so that you can initiate block transfer writes (BTW) to the module, and read inputs (BTR) from the module.

To manually calibrate the module:

1.

Apply a reference to the desired input(s).

2.

Send a message to the module indicating which inputs to read and what calibration step is being performed (offset).

The module returns a response which echoes the message sent to the module. The module stores this input data.

3.

Apply a second reference signal to the module.

4.

Send a second message indicating which inputs to read and what calibration step is being performed (gain).

The module computes new calibration values for the inputs and returns a response which echoes back the message sent to the module. If the calibration cannot be completed, the module returns a fault message.

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41

Using P r e c ision Resisto r s - fo r 383

Ω

and 100

Ω c alib r ation

Calibration Setup

0

0

1

1 2

2 3

3

4

4 5

5 6

6

7

7

8

8

9

9 10 11 12 13 14 15

10 11 12 13 14 15

16

34

17 18

35 36

19 20

37 38

21

39

22 23 24

40 41 42

25 26

43 44

27

45

28 29

46 47

30

48

31 32

49 50

33

51

Using P r e c ision Voltage S ou rc e fo r offset and gain c alib r ation

+ -

P r e c ision Voltage S ou rc e

0

0

16 17

1

1 2

2

18 19

3

3

20

4

4

5

5

21 22

6

6

23

7

7

8

8

24

9

9 10 11 12 13 14 15

10

25 26 27

11 12

28 29

13

30

14 15

31 32 33

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

45357

1794-TB3G

C onne c t + to te r minals 2, 6, 10, 14, 19, 23, 27, and 31

C onne c t - to te r minals 3, 7, 11, 15, 20, 24, 28 and 32

C onne c t one 10 K

Ω

, 0.5% r esisto r a cr oss te r minals 37 and 39 and anothe r a cr oss 46 and 48.

RTD

4-wire

1

1a

2a

2

+ mV

-

Millivolt

1

2

45358

Wiring Connections for Calibrating the Thermocouple and RTD Input Module

Type of Input Connect the following

RTD – 4-wire

Millivolt

H

1a

L

2a

1

+

1

-

2

2

Shield

Wiring to the 1794-TB3G and 1794-TB3GS Terminal Base Units

4

5

6

2

3

0

1

RTD or

Thermocouple

Channel

1794-TB3G and 1794-TB3GS Terminal Base Units

(1)

High Signal

Terminal (H)

18

22

26

1

5

9

13

Low Signal

Terminal (L)

2

6

10

14

19

23

27

RTD Source

Current (+)

0

4

8

12

17

21

25

Signal Return

(-)

20

24

28

3

7

11

15

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Wiring to the 1794-TB3G and 1794-TB3GS Terminal Base Units

RTD or

Thermocouple

Channel

1794-TB3G and 1794-TB3GS Terminal Base Units

High Signal

Terminal (H)

7 30

24V DC Power 34 and 50

24V DC

Common

35 and 51

Low Signal

Terminal (L)

31

RTD Source

Current (+)

29

(1)

Signal Return

(-)

32

(1) Terminals 16, 33 and 40…45 are chassis ground.

Read and Write Words for Calibration

The following tables provide read and write words for module calibration.

Write Words for Calibration

Decimal

Octal

Word ⇓

0

1

2

3

Where:

15 14 13 12 11 10 09 08 07

17 16 15 14 13 12 11 10 07

06

06

05

05

04

04

03

03

02

02

01

01

00

00

Write

Reserved

TC/RTD

Ch. 4…7

RTD Offset

Ch 7

Sensor

Mode

Ch 4…7

RTD Offset

Ch 6

EDT command

Data Format

Sensor Type Ch 4…7

RTD Offset

Ch 5

RTD Offset

Ch 4

Flt

Mode

Ch

0…3

0…3

Flt = Fault

TC/RTD = Thermocouple/Resistance Temperature Detector

EDT = Extended Data Transfer

Flt

Mode

Ch

4…7

TC/RTD Ch.

Reference Junction

Sensor Mode

Ch 0…3

RTD Offset

Ch 3

EDT command data

RTD Offset

Ch 2

Filter Select

Sensor Type Ch 0…3

RTD Offset

Ch 1

RTD Offset

Ch 0

Read Words for Calibration

Decimal

2

3

4

0

1

Octal

Word

⇓

15 14 13 12 11 10 09 08 07

17 16 15 14 13 12 11 10 07

Read

Channel 0 Input Data

Channel 1 Input Data

Channel 2 Input Data

Channel 3 Input Data

Channel 4 Input Data

06

06

05

05

04

04

03

03

02

02

01

01

00

00

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43

Read Words for Calibration

Decimal

8

9

6

7

Octal

Word

⇓

5

10

Where:

15 14 13 12 11 10 09 08 07

17 16 15 14 13 12 11 10 07

06

06

05

05

04

04

03

03

02

02

Read

Channel 5 Input Data

Channel 6 Input Data

Channel 7 Input Data

Overrange Alarm Bits (channel 0 = bit 08, and so on.) Underrange Alarm Bits (channel 0 = bit 00, and so on.)

Ch7

Flt

Ch6

Flt

Ch5

Flt

Ch4

Flt

Ch3

Flt

Ch2

Flt

Ch1

Flt

Ch0

Flt

CJC 2

Flt

CJC 1

Flt

SAB Diagnostic Status

EDT data response EDT command response

Flt = Fault

CJC = Cold Junction Compensation

SAB = Series of unit; 0 = Series A; 1 = Series B

01

01

ATTENTION

00

00

The CJC Status bit, Read Word 9, Bit 3 is added with the Firmware C release of the 1794-IRT8 Series B module.

The CJC Status bit is turned On when the temperature between the

CJCs is greater than 6 °C but less than 12 °C.

When this temperature difference is above 12 °C, then the CJC Alarm bits are set.

Also, if a CJC temperrature is over-range or under-range, then the associated CJC Alarm bit is set. In this condition, the CJC Status bit is not set.

The CJC Status bit does not exist in Series A.

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Calibrate Your Module

EDT Calibration Command and Command Data Summary

Config Word 3

EDT Command bits 8…15

Dec. (Hex)

4 (4)

Meaning

General calibration by channel

Config Word 3 bits 4…7

Channel No.

0…7

Config Word 3 bits 0…3

Command data

1

5 (5) Offset calibration by channel

0…7

0…7

0…7

0…7

2

3

4

0

Meaning

Channel internal current source and current sense resistor, with

4-wire external 383 Ω inputs

Channel internal current source and current sense resistor with

4-wire external 100 Ω inputs

Loop channel compensation for

2-wire RTD

CJC calibration gain= 1, input = -320 mV

6 (6) Gain calibration by channel

0…7

0…7

0…7

0…7

0…7

1

2

3

4

5

0 gain = 2, input = 0.0 mV gain = 4, input = -50 mV gain = 8, input = -10.0 mV gain = 16, input = -9 mV gain = 32, input = 1.0 mV gain = 1, input = 320 mV

3

4

5

1

2 gain = 2, input = 320 mV gain = 4, input = 110 mV gain = 8, input = 70 mV gain = 16, input = 29 mV gain = 32, input = 19 mV

36 (24) Calibration all channels

General calibration all channels

0 1

Offset calibration all channels

0

0

0

1

2

3

4

0

Channel internal current source and current sense resistor, with

4-wire external 383 Ω inputs

Channel internal current source and current sense resistor with

4-wire external 100 Ω inputs

Loop channel compensation for

2-wire RTD

CJC calibration gain = 1, input = -320 mV

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45

Config Word 3

EDT Command bits 8…15

Meaning

Gain calibration all channels

1

2

1

1

1

1

2

2

2

2

2

Config Word 3 bits 4…7

Config Word 3 bits 0…3

1

2

3

4

5

0

Meaning gain = 2, input = 0.0 mV gain = 4, input = -50 mV gain = 8, input = -10.0 mV gain = 16, input = -9 mV gain = 32, input = 1.0 mV gain = 1, input = 320 mV gain = 2, input = 320 mV gain = 4, input = 110 mV gain = 8, input = 70 mV gain = 16, input = 29 mV gain = 32, input = 19 mV

Offset Calibration

Inputs can be calibrated one at a time or all at once. To calibrate the offsets, proceed as follows:

1.

Apply power to the module for 20 minutes before calibrating.

2.

Connect a precision millivolt source across each input channel. Set the source to -320.00 mV for a gain of 1. Connect all (L) signal terminals together and attach to the positive lead from the precision voltage source. Connect all (-) signal terminals together and attach to the negative lead.

EDT Commands for Offset Calibration

1

2

4

Gain

Selected

Input (mV)

All Channels

EDT Command

Hex Decimal

Single Channel

EDT

Command

Dec. or Hex

Bits 8 …

15

-320.00 + 0.064 mV 2410 9232

0.000 + 0.032 mV 2411 9233

-50.00 + 0.016 mV 2412 9234

05

05

05

EDT Command

Data

Dec. or Hex

Bits

4 … 7

0 … 7

0 … 7

0 … 7

1

2

Bits

0 … 3

0

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Calibrate Your Module

EDT Commands for Offset Calibration

Gain

Selected

8

16

32

Input (mV)

All Channels

EDT Command

Hex Decimal

-10.00 + 0.008 mV 2413 9235

-9.00 + 0.004 mV 2414 9236

1.000 + 0.002 mV 2415 9237

05

05

05

Single Channel

EDT

Command

Dec. or Hex

Bits 8 … 15

EDT Command

Data

Dec. or Hex

Bits

4 … 7

0 … 7

0 … 7

0 … 7

4

5

Bits

0 … 3

3

3.

Initiate a write to the module with the appropriate value in the EDT command location (write word 3, bits 00…15), as shown above.

4.

Monitor the EDT response location (read word 11 bits 00…15) for an echo of the EDT command. Depending on which command you sent, it should show 241X Hex.

If the EDT response word reads 80FF (hex), repeat the step 3. Make sure that sufficient time is allowed for the module to respond to your request. If there is no change, calibration has failed. Check the wiring and try again.

5.

Set the precision millivolt source to the value required for a gain of 2.

Repeat steps 3 and 4 for gain 2. Repeat for each gain setting.

6.

When all offset calibrations are successful, proceed to the gain calibration.

Gain Calibration

After completing the offset calibration, proceed with the gain calibration.

1.

Connect a precision millivolt source across each input channel. Set the source to 320.00 mV for a gain of 1. Connect all (L) signal terminals together and attach to the positive lead from the precision voltage source. Connect all (-) signal terminals together and attach to the negative lead.

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47

EDT Commands for Gain Calibration

All Channels

EDT Command

Gain

Selected

4

8

1

2

16

32

Input (mV) Hex Decimal

-320.00 + 0.064 mV 2420 9248

320.00 + 0.032 mV 2421 9249

110 + 0.016 mV

70.00 + 0.008 mV

2422

2423

9250

9251

29.00 + 0.004 mV

19.00 + 0.002 mV

2424 9252

2425 9253

06

06

06

06

06

06

Single Channel

EDT

Command

Dec. or Hex

Bits 8 … 15

EDT Command

Data

Dec. or Hex

Bits

4 … 7

Bits

0 … 3

0 … 7 0

0 … 7 1

0 … 7 2

0 … 7 3

0 … 7 4

0 … 7 5

2.

Apply power to the module for 20 minutes before calibrating.

3.

After the connections stabilize, initiate a write word with the appropriate

EDT command location (write word 3, bits 00…15) as shown above.

4.

Monitor the value in the EDT response location (read word 11, bits 00…15) for an echo of the EDT command. Depending on which command you sent, it should show 242X Hex.

If the EDT response word reads 80FF (hex), repeat step 3. Make sure to allow for sufficient time for the module to respond to your request. If there is no change, calibration has failed. Check the wiring and try again.

5.

Set the precision millivolt source to the value required for a gain of 2.

Repeat steps 3 and 4 for gain 2. Repeat for each gain setting.

When all gain calibrations are successful, proceed to perform Current Source

Calibration on page 47.

Current Source Calibration

The current sources can be calibrated one at a time or all at once. To calibrate all the current sources, proceed as follows:

1.

Connect a 383 Ω , 0.01% resistor across (H, +) and (L, -) of each input channel (8 resistors).

2.

Apply power to the module for 20 minutes before calibrating.

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Calibrate Your Module

3.

Initiate a write to the module with 2401 (hex) value in EDT command location (word 3, bits 00…15), as shown, for calibrating all channels at once. For individual channel calibrations, use the 04X1 (hex) (0401,

0411, 0421, ...0471 hex).

4.

Monitor the EDT response location (read word 10, bits 00…15) for an echo of the EDT command.

If the EDT response word reads 80FF (hex), repeat step 3. Make sure to allow for sufficient time for the module to respond to your request. If there is no change, calibration has failed. Check the wiring and try again.

5.

Connect a 100 Ω , 0.01% resistor across (H, +) and (L, -) of each input channel (8 resistors). Repeat steps 3 and 4 using the EDT command value of 2402 (hex) for calibrating all channels at once. For individual channel calibrations, use the 04X2 (hex) (0402, 0412, 0422, ...0472 hex).

When all calibrations are successful, proceed to the Cold Junction Calibration

on page 47.

Publication 1794-6.5.12 - September 2011

Chapter Summary

Calibrate Your Module

49

Cold Junction Calibration

Both cold junction compensation inputs must be calibrated at at the same time. To calibrate both at once, proceed as follows:

1.

Connect 10 K Ω , 0.5% resistors across terminals 37 and 39 (CJC 1) and terminals 46 and 48 (CJC 2).

2.

Apply power to the module for 20 minutes before calibrating.

3.

Initiate a write to the module with 2404 (hex) value in the EDT command location (word 3, bits 00…15).

4.

Monitor the EDT response location (read word 11, bits 00…15) for an echo of the EDT command.

If the EDT response word reads 80FF (hex), repeat step 3. Make sure that sufficient time is allowed for the module to respond to your request. If there is no change, calibration has failed. Check the wiring and try again.

Channel Loop Compensation Calibration

Each 2-wire RTD can be calibrated individually, or at the same time. Proceed as follows.

1.

Short circuit the end of each input cable at the RTD element. Do this for all the channels to be calibrated.

2.

Apply power to the module for 20 minutes before calibrating.

3.

Initiate a write to the module with 2403(hex) (calibrate all channels) in the EDT command location (write word 3, bits 00…15). For individual channel calibrations, use 04X3 (hex) (0403, 0413, 0423, ...0473).

4.

Monitor the EDT response location (read word 1X, bits 00…15) for an echo of the EDT command.

If the EDT response word reads 80FF (hex), repeat step 3. Make sure that sufficient time is allowed for the module to respond to your request. If there is no change, calibration has failed. Check the wiring and try again.

This chapter provided the user with instructions on how to calibrate your

FLEX I/O Thermocouple, RTD, and mV input module.

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Calibrate Your Module

Notes:

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Chapter

6

Troubleshoot the Module

Overview

Module Indicators

This chapter provides a description of the different status indicators for the

FLEX I/O Thermocouple, RTD, and mV module to help you troubleshoot.

The FLEX I/O module has one status indicator (PWR) that is On when power is applied to the module, and one fault indicator (F) for each input.

1794-IRT8

TC RTD INPUT 8 CHANNEL

Status Indicators

Indicator

Fault

Color

Red

State

On

IN 0

F

IN 1

F

IN 2

F

IN 3

F

IN 4

F

IN 5

F

IN 6

F

IN 7

F

PWR

3

A B

A

– Insertable label for writing individual input designations

B

– Fault Indicator - indicates noncritical fault

C

– Power Indicator - indicates power applied to module A

C

Description

At power up – Channel 0 indicator lights at power up until all internal diagnostics are checked. After successful power up, the indicator goes off if no fault is detected and the module has started communicating with an adapter.

After successful power up – Indicates a critical fault, such as diagnostic failure. If channel indicator stays solid red after power up, there is an internal module error. Try cycling power. If problem persists, replace module.

If channel indicator continues to blink after power up, communication between the module and the adapter has not been established.

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Troubleshoot the Module

Status Indicators

Indicator Color

Power

Green

State

Blinking

(when faults are enabled, and bit set)

Off

On

Description

Indicates a noncritical fault (such as open sensor). Input data set to maximum, and indicator flashes at about 1 Hz rate.

Module not powered

Module receiving power

The FLEX I/O Thermocouple, RTD, and mV module returns diagnostics to the processor in Word 9 of the block transfer read (BTR) file. These diagnostics give you information on the status or condition of the module.

Diagnostic Bits in Word 9

Word Dec. Bits

(Octal Bits)

Read Word 9 00…03

Description

04

05…06

07

08…15

(10…17)

Diagnostic bits – represent module configuration and/or hardware errors.

Bit 03 02 01 00

0 0 0 0 Reserved for factory use

0 0 1 0 Improper module configuration

0 1 1 0 RAM ault f

0 1 1 1 EEPROM fault

0001, 0100, and 0011…1111 Reserved for factory use

Series of Unit (SAB) – 0 = Series A, 1 = Series B

Cold junction compensation fault bits – These bits are set (1) when the corresponding cold junction compensator lead is broken, unattached or shorted, and the thermocouple is set to "external compensation.” Bit 05 corresponds to CJC1, and bit

06 to CJC2.

Not used

Fault alarm bits – An alarm bit is set (1) when an individual input lead opens (broken, disconnected). If the alarm is enabled, the channel reads maximum value. Bit 08 (10) corresponds to input channel 0, bit

09 (11) to channel 1, and so on.

Chapter Summary

This chapter specified the different status indicators that would help the user troubleshoot the module.

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53

Overview

Appendix

A

Specifications

This appendix contains general and environmental specifications and certifications for the FLEX I/O Thermocouple, RTD, mV Input Modules.

General Specifications

Attribute

Number of inputs

Module location

Nominal input voltage ranges

Supported thermocouple types

Supported RTD types

Value

8 channels (2 groups of 4)

Cat. Nos. 1794-TB3G, 1794-TB3GS, 1794-TB3GK Terminal base units

-40…100 mV DC for thermocouples

0…325 mV for RTDs mV default

S

T

E

J

Type

B

N

R

K

TXK/XK(L)

Range °C

300…1800 °C

-270…1000 °C

-210…1200 °C

-270…1372 °C

200…800 °C

-270…1300 °C

-50…1768 °C

-50…1768 °C

-270…400 °C

Range °F

(572…3272 °F)

(-454…1832 °F)

(-346…2192 °F)

(-454…2502 °F)

(-328…1472 °F)

(-454…2372 °F)

(-58…3214 °F)

(-58…3214 °F)

(-454…752 °F)

Resistance

100 Ω Pt α = 0.00385 Euro -200…870 °C (-328…1598 °F)

200 Ω Pt α = 0.00385 Euro -200…400 °C (-328…752 °F)

100 Ω Pt α = 0.003916 U.S. -200…630 °C (-328…1166 °F)

100 Ω Pt α = 0.003916 U.S. -200…400 °C (-328…752 °F)

Resolution

Accuracy vs. filter cutoff

Data format

100 Ω Nickel -60…250 °C (-76…482 °F)

200 Ω Nickel -60…200 °C (-76…362) °F)

120 Ω Nickel -80…320 °C (-112…608 °F)

10 Ω Copper -200…260 °C (-328…470 °F)

14 bits

0.05% of full range in millivolt mode with filtering selected

Hardware only = 0.10% of full range in millivolt mode

°C (implied decimal point XXX.X)

°F (implied decimal point XXX.X)

°K (implied decimal point XXX.X)

-32767…32767

0…65535

0…5000 ohms mode (implied decimal point XXX.X)

-4000…+10000 millivolt mode (implied decimal point XXX.XX)

Common mode rejection -80 db @ 5V peak-to-peak, 50…60 Hz

Common mode input range +15V min

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54

Specifications

Publication 1794-6.5.12 - September 2011

General Specifications

Attribute

Isolation voltage

(continuous voltage withstand rating)

Value

50V (continuous), Basic Insulation Type

Type tested @ 1365V AC for 60 s, between field side and system

No isolation between individual channels

Typical module timing is shown here.

System throughput (8 channels scanned) – Add

0.5 ms if filtering is selected

Open circuit protection

7.4 ms - millivolt

8.0 ms - Ω - 2-wire RTD

10.0 ms - Ω - 3-wire RTD

10.4 ms - Ω - 4-wire RTD

8.0 ms - 2-wire RTD (°F)

10.4 ms - 4-wire RTD (°F)

8.8 ms - 2-wire RTD (°C), (°K)

10.8 ms - 4-wire RTD (°C), (°K)

9.8 ms - 3-wire RTD (°F)

10.0 ms - 3-wire RTD (°C), (°K)

9.0 ms - Thermocouples (°F)

9.4 ms - Thermocouples (°C), (°K)

RTD mode – Open input – Module defaults to max value

TC mode – Open input – Module defaults to min value

To simulate wire-off detection in Series A TC mode when using a Series B module, attach a jumper from terminal 39 to terminal

48 on the 1794-TB3G, 1794-TB3GS, or 1794-TB3GK terminal base unit so that an open input will default to max value.

Open input detection time Immediate detection 2 scans, max

Overvoltage capability 15V DC continuous at 25 °C

50 ppm/°C of span Overall drift with temperature, max

Cold junction compensation range

-20…100 °C

Cold junction compensator Allen-Bradley catalog number 1794-CJC2

Indicators 1 green power status indicator

8 red open input indicators

FlexBus current 40 mA

Power dissipation, max 3.0 W @ 31.2V DC

Thermal dissipation, max 10.2 BTU/hr @ 31.2V DC

3 Keyswitch position

External DC power supply voltage

Voltage range

Supply current

Dimensions (with module installed in base) HxWxD approx.

Temperature code, IEC

24V DC nom

95 mA @ 24V DC

94 x 94 x 69 mm

(3.7 x 3.7 x 2.7 in.)

T4

Specifications

55

General Specifications

Attribute

Temperature code, North

American

Enclosure type rating

Wire size

Signal conductors

Value

T4A

None (open-style)

Determined by installed terminal base

Thermocouple

Millivolt

Wire type

Wiring category (1)

Use appropriate shielded thermocouple wire (2)

Belden 8761

Shielded on signal ports

2 – on signal ports

3 – on power ports

Determined by installed terminal base Terminal screw torque for cage-clamp terminal base

(1) Refer to the thermocouple manufacturer for proper thermocouple extension.

(2) Use this category information for planning conductor routing as described in Industrial Automation Wiring and

Grounding Guidelines, Allen-Bradley publication 1770-4.1

.

Environmental Specifications

Attribute Value

Temperature, operating IEC 60068-2-1 (Test Ad, Operating Cold),

IEC 60068-2-2 (Test Bd, Operating Dry Heat),

IEC 60068-2-14 (Test Nb, Operating Thermal Shock):

-20…55 °C (-4…131 °F) (1794-IRT8, 1794-IRT8K)

-20…70 °C (-4…158 °F) (1794-IRT8XT)

Temperature, non- operating

Relative humidity

Vibration

Shock operating nonoperating

IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold),

IEC 60068-2-2 (Test Bb, Unpackaged Non-operating Dry Heat),

IEC 60068-2-14 (Test Na, Unpackaged Non-operating

Thermal Shock):

-40…85 °C (-40…185 °F)

IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):

5…95% noncondensing

IEC 60068-2-6 (Test Fc, Operating):

5 g @ 10…500 Hz

IEC60068-2-27 (Test Ea, Unpackaged shock):

30 g

50 g

Emissions

ESD immunity

CISPR 11:

Group 1, Class A (with appropriate enclosure)

IEC 61000-4-2:

6 kV contact discharges

8 kV air discharges

Publication 1794-6.5.12 - September 2011

56

Specifications

Publication 1794-6.5.12 - September 2011

Environmental Specifications

Attribute Value

Radiated RF immunity IEC 61000-4-3:

10V/m with 1 kHz sine-wave 80% AM from 80…2000 MHz

10V/m with 200 Hz 50% Pulse 100% AM at 900 MHz

10V/m with 200 Hz 50% Pulse 100% AM at 1890 MHz

3V/m with 1 kHz sine-wave 80% AM from 2000…2700 MHz

EFT/B immunity

Surge transient immunity

IEC 61000-4-4:

±2 kV at 5 kHz on power ports

±2 kV at 5 kHz on shielded signal ports

IEC 61000-4-5:

±2 kV line-earth(CM) on shielded signal ports

Conducted RF immunity IEC 61000-4-6:

10V rms with 1 kHz sine-wave 80% AM from

150 kHz…80 MHz on shielded signal ports

ATTENTION

To comply with the CE Low Voltage Directive (LVD), all connections to this equipment must be powered from a source compliant with the following:

Safety Extra Low Voltage (SELV) or Protected Extra Low Voltage (PELV).

Certifications

Certification (when product is marked)

(1) c-UL-us

Value

UL Listed Industrial Control Equipment, certified for US and

Canada. See UL File E65584.

CE

C-Tick

Ex

TÜV

UL Listed for Class I, Division 2 Group A,B,C,D Hazardous

Locations, certified for U.S. and Canada. See UL File E194810.

European Union 2004/108/EC EMC Directive, compliant with:

EN 61326-1; Meas./Control/Lab., Industrial Requirements

EN 61000-6-2; Industrial Immunity

EN 61000-6-4; Industrial Emissions

EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)

Australian Radiocommunications Act, compliant with:

AS/NZS CISPR 11; Industrial Emissions

European Union 94/9/EC ATEX Directive, compliant with:

EN 60079-15; Potentially Explosive Atmospheres, Protection

"n" (II 3 G Ex nA IIC T4 X)

EN 60079-0; General Requirements (Zone 2)

TÜV Certified for Functional Safety: up to and including SIL 2

(1) See the Product Certification link at http://www.ab.com

for Declarations of Conformity, Certificates, and other certification details.

57

Overview

Appendix

B

Electronic Data Sheet (EDS) Files

EDS provides the definition for a device’s configurable parameters and public interfaces to those parameters.

Every type of configurable device has its own unique EDS. It is a simple text file that allows product-specific information to be made available to third-party vendors.

This makes updating of configuration tools easier without having to constantly revise the configuration software tool.

Beginning with the following revisions, EDS files are required for RSNetworx for Devicenet and ControlNet, RSLinx, RSLogix5, and RSLogix 5000 software to recognize a device:

RSNetworx

RSLinx

RSLogix5

RSLogix5000

Version 2.21

Version 1.10.176

Version 4.0

Version 5.12

Updating EDS File

Most EDS files are installed with RSLinx, RSNetworx, and other RSI software as long as you enable the option during installation.

There are instances where you will need to acquire and register EDS files on your own even after all software is installed.

• If you go online with RSNetworx and it shows a device with a "?" mark icon, a globe, or a message that says the device is unrecognized, this means the EDS file for that device does not exist on your PC.

• If RSLinx can see a processor but going online, uploading or downloading is not possible.

With ControlLogix modules the backplane does not show after expanding the tree or ControlLogix modules in the backplane show up as a yellow question mark without a red X sign.

An EDS file is also required if a bridge module such as a 1756-CNB or DNB does not show the "+" sign to expand the tree to show its network.

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58

Electronic Data Sheet (EDS) Files

To acquire EDS files for Rockwell Automation and Allen-Bradley devices, go to Tools & Resources EDS Files at www.ab.com/networks/eds . It allows you to search for devices by the type of network and their catalog number.

ATTENTION

•Make sure to match the major firmware revision of the device as each major firmware revision is associated with a specific

EDS file.

•Download the EDS file and place it in any folder, except the

/Program Files/Rockwell Software/RSCommon/EDS folder where your Rockwell Automation software is installed.

•Register EDS files with RSNetworx by selecting Tools EDS

Wizard.

•Select Register an EDS File, then click the Browse button on the Next page to find your file.

EDS Installation

You can register EDS files with the EDS Hardware Installation tool.

1.

In Windows, go to Rockwell Software → RSLinx Tools → EDS

Hardware Installation Tool.

2.

Click Add to register an EDS file.

When an EDS file is registered, a copy of the file is made and placed in the /RSCommon/EDS folder, where your Rockwell Automation software is installed and your Windows registry is updated. Once the registration is complete you can move, copy, or delete the original files.

ATTENTION

Only one EDS file is required to support both the Series A and Series B modules. The module ID for the Series A and B is identical because there is no change in software functionality.

The Series B hardware jumper determines how the module data reacts to an open circuit condition.

ATTENTION

The Series A and B EDS file can be downloaded from www.ab.com/networks/eds .

The EDS file is installed using the RSLinx Tools EDS Hardware

Installation Tool.

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59

Appendix

C

Program Your Module with PLC Family

Processors

Overview

Enter Block Transfer

Instructions

This Appendix serves as a reference to users of the PLC-* Family Processors to program their modules.

To initiate communication between the Thermocouple, RTD, and Millivolt modules and your PLC processor, you must enter block transfer instructions into your ladder logic program. Use this chapter to enter the necessary block transfer instructions into your ladder logic program.

The Thermocouple, RTD, and Millivolt modules communicate with the PLC processor through bidirectional block transfers. This is the sequential operation of both read and write block transfer instructions.

Before you configure the module, you need to enter block transfer instructions into your ladder logic. The following example programs illustrate the minimum programming required for communication to take place between the module and a PLC processor. These programs can be modified to suit your application requirements.

A configuration block transfer write (BTW) is initiated when the frequency module is first powered up, and subsequently only when the programmer wants to enable or disable features of the module. The configuration BTW sets the bits which enable the programmable features of the module, such as scalars and alarm values, and so on. Block transfer reads are performed to retrieve information from the module.

Block transfer read (BTR) programming transmits status and data from the module to the processor data table. The processor user program initiates the request to transfer data from the module to the processor. The transferred words contain module status, channel status and input data from the module.

Your program should monitor status bits, block transfer read and block transfer write activity.

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Program Your Module with PLC Family Processors

PLC-2 Family Processor

The 1794 Thermocouple, RTD, and Millivolt modules are not recommended for use with PLC-2 family programmable controllers due to the number of digits needed for high resolution.

IMPORTANT

The Thermocouple, RTD, and Millivolt modules function with reduced performance in PLC-2 systems. Because the modules do not support BCD and the PLC-2 processor is limited to values of

4095 (12 bit binary), many values returned in the BTR file may not provide meaningful data to the PLC-2 processor.

PLC-3 Family Processor

Block transfer instructions with the PLC-3 processor use a control file and a data file. The block transfer control file contains the data table section for module location, the address of the block transfer data file and other related data. The block transfer data file stores data that you want transferred to the module (when programming a BTW) or from the module (when programming a BTR).

The programming terminal prompts you to create a control file when a block transfer instruction is being programmed. The same block transfer control file is used for both the read and write instructions for your module. A different block transfer control file is required for every module.

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Program Your Module with PLC Family Processors

61

PLC-3 Processor

Program Example

Rung M:0

The IRT8 module is located in rack 3, I/O group 2, slot 1. The control file is a 10 word file starting at B17:0 that is shared by the BTR/BTW. The data obtained by the PLC3 processor is placed in memory starting at location N18:101, and with the default length of 0, is 11 words long.

IRT8 BTR/BTW

Control Block

BTR

IRT8 BTR

Done Bit

B17:0

15

BLOCK TRANSFER READ

Rack

Group

Slot

3

2

1

B17:0 Control

Data File

Length

N18:101

0

EN

DN

ER

IRT8 BTR

Error Bit

B17:0

13

IRT8 BTR

Error Bit

B17:0

U

13

The IRT8 module is located in rack 3, I/O group 2, slot 1. The control file is a 10 word file starting at B17:0 that is shared by the BTR/BTW. The data sent by the PLC-3 processor to the IRT8 module is from PLC memory starting at N18:1, and with the default length of 0, is 4 words long.

IRT8 BTW

Done Bit

IRT8 BTR/BTW

Control Block

BTW

B17:0

5

BLOCK TRANSFER WRITE

Rack

Group

Slot

Control

Data

Length

3

2

1

B17:0

N18:1

0

EN

DN

ER

IRT8 BTW

Error Bit

B17:0

3

IRT8 BTW

Error Bit

B17:0

U

3

45566

PLC-5 Family Processor

Block transfer instructions with the PLC-5 processor use a control file and a data file. The block transfer control file contains the data table section for module location, the address of the block transfer data file and other related data. The block transfer data file stores data that you want transferred to the module (when programming a BTW) or from the module (when programming a BTR).

The programming terminal prompts you to create a control file when a block transfer instruction is being programmed. A different block transfer control file is used for the read and write instructions for your module.

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Program Your Module with PLC Family Processors

PLC-5 Processor

Program Example

Rung 2:0

The IRT8 module is located in rack 2, I/O group 2, slot 1. The integer control file starts at N22:200, is 5 words long and is compatible with all PLC-5 family members.

The data obtained by the PLC-5 processor from the IRT8 module is placed in memory starting at N22:101, and with the default length of 0, is 11 words long. The length can be any number

IRT8 BTR

Enable Bit

N22:200

IRT8 BTW

Enable Bit

N22:205

15 15

IRT8 BTR

Control File

BTR

BLOCK TRANSFER READ

Rack

Group

Slot

Control

Data File

Length

Continuous

02

2

1

N22:200

N22:101

0

N

EN

DN

ER

Rung 2:1

The IRT8 module is located in rack 2, group 2, slot 1. The integer control file starts at N22:205, is a 5 words long and is compatible will all PLC-5 family members. The data sent by the PLC-5 processor to the IRT8 module starts at N22:1, and with the default length of 0, is 4 words long. Valid BTW lengths: 0, 1, 2, 3, and 4. In enhanced PLC-5 processors

1

, the block transfer data type may be used as a control file.

IRT8 BTR

Enable Bit

N22:200

IRT8 BTW

Enable Bit

N22:205

15 15

IRT8 BTW

Control File

BTW

BLOCK TRANSFER WRITE

Rack 02

Group

Slot

Control

Data File

2

1

N22:205

N22:1

Length

Continuous

0

N

EN

DN

ER

À

Enhanced PLC-5 processors include: PLC-5/11, -5/20, -5/3x, -5/4x, and -5/6x.

45567

PLC-5/250 Family Processor

Block transfer instructions with the PLC-5/250 processor use a control file and a data file. The block transfer control file contains the data table section for module location, the address of the block transfer data file and other related data. The block transfer data file stores data that you want transferred to the module (when programming a BTW) or from the module (when programming a BTR).

The programming terminal automatically selects the control file based on rack, group and module, and whether it is a read or write. A different block transfer control file is used for the read and write instructions for your module. A different block transfer control file is required for every module.

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Program Your Module with PLC Family Processors

63

PLC-5/250 Processor

Program Example

Rung 1STEPO:1

The IRT8 module is located in rack 14, I/O group 1, slot 0. The data obtained by the

PLC-5/250 processor from the IRT8 module is placed in the data table starting at

2BTD5:101, and with the default length of 0, is 11 words long. The length can be any number between 0 and 11.

IRT8 BTR

Control File

IRT8 BTR

Enable Bit

IRT8 BTW

Enable Bit

BTR

BR141:0

EN

BW141:0

EN

BLOCK TRANSFER READ

Rack

Group

Slot

Control Block

Data File

BT Length

14

1

0

BR141:0

2BTD5:101

0

EN

DN

ER

Continuous

BT Timeout

NO

4

Rung 1STEPO:1

The IRT8 module is located in rack 14, I/O group 1, slot 0. The data sent to the

IRT8 module from the PLC-5/250 processor is from the data table starting at 2BTD5:1, and with a default length of 0, is 4 words long. Valid BTW lengths: 0, 1, 2, 3, and 4.

IRT8 BTR

Enable Bit

BR141:0

EN

IRT8 BTW

Enable Bit

BW141:0

EN

IRT8 BTW

Control File

BTW

BLOCK TRANSFER WRITE

Rack

Group

Slot

Control Block

Data File

BT Length

Continuous

BT Timeout

14

1

0

BW141:0

2BTD5:1

NO

0

4

EN

DN

ER

45568

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64

Program Your Module with PLC Family Processors

Notes:

Publication 1794-6.5.12 - September 2011

65

Appendix

D

Safety Approvals

European Hazardous

Location Approval

The 1794-IRT8, 1794-IRT8K, and 1794-IRT8XT modules are European

Hazardous Location approved.

European Zone 2 Certification (The following applies when the product bears the

Ex or EEx Marking)

This equipment is intended for use in potentially explosive atmospheres as defined by

European Union Directive 94/9/EC and has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of Category 3 equipment intended for use in potentially explosive atmospheres, given in Annex II to this Directive.

Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079-15 and EN 60079-0.

WARNING

Observe the following additional Zone 2 certification requirements.

• This equipment is not resistant to sunlight or other sources of UV radiation.

• This equipment must be installed in an enclosure providing at least IP54 protection when applied in Zone 2 environments.

• This equipment shall be used within its specified ratings defined by Allen-Bradley.

• Provision shall be made to prevent the rated voltage from being exceeded by transient disturbances of more than 40% when applied in Zone 2 environments.

• Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with this product.

• Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.

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66

Safety Approvals

North American Hazardous

Location Approval

The 1794-IRT8, 1794-IRT8K, and 1794-IRT8XT modules are North

American Hazardous Location approved.

The following information applies when operating this equipment in hazardous locations.

Products marked “CL I, DIV 2, GP A, B, C, D” are suitable for use in Class I Division 2 Groups A, B, C, D, hazardous locations and nonhazardous locations only. Each product is supplied with markings on the rating nameplate indicating the hazardous location temperature code. When combining products within a system, the most adverse temperature code (lowest “T” number) may be used to help determine the overall temperature code of the system. Combinations of equipment in your system are subject to investigation by the local Authority Having Jurisdiction at the time of installation.

WARNING

EXPLOSION HAZARD

•Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.

•Do not disconnect connections to this equipment unless power has been removed or the area is known to be nonhazardous. Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with this product.

•Substitution of components may impair suitability for Class I, Division 2.

•If this product contains batteries, they must only be changed in an area known to be nonhazardous.

Informations sur l’utilisation de cet équipement en environnements dangereux.

Les produits marqués “CL I, DIV 2, GP A, B, C, D” ne conviennent qu’à une utilisation en environnements de Classe

I Division 2 Groupes A, B, C, D dangereux et non dangereux.

Chaque produit est livré avec des marquages sur sa plaque d’identification qui indiquent le code de température pour les environnements dangereux. Lorsque plusieurs produits sont combinés dans un système, le code de température le plus défavorable (code de température le plus faible) peut être utilisé pour déterminer le code de température global du système. Les combinaisons d’équipements dans le système sont sujettes à inspection par les autorités locales qualifiées au moment de l’installation.

AVERTISSEMENT

•Couper le courant ou s’assurer que l’environnement est classé non dangereux avant de débrancher l'équipement.

•Couper le courant ou s'assurer que l’environnement est classé non dangereux avant de débrancher les connecteurs. Fixer tous lesconnecteurs externes reliés à cet équipement à l'aide de vis, loquets coulissants, connecteurs filetés ou autres moyens fournis avec ce produit.

•La substitution de composants peut rendre cet équipement inadapté à une utilisation en environnement de Classe

I, Division 2.

•S’assurer que l’environnement est classé non dangereux avant de changer les piles.

Publication 1794-6.5.12 - September 2011

Numerics

1756-CNB

57

1756-ENBT 21

1794-ACN15

3

1794-ACNR15

3

1794-ACNR15K

3

1794-ADN

3

1794-AENT

3, 22

1794-APB

3

1794-APBDPV1

3

1794-ASB

3

1794-CJC2

2, 54

1794-IRT8

ix, 2, 4, 8, 21, 38, 71, 72

1794-IRT8K ix, 2, 71, 72

1794-IRT8XT

ix, 2, 71, 72

1794-TB3G

7, 14, 15, 16, 18, 38, 39, 53, 54

1794-TB3GK

15, 16, 18, 53, 54

1794-TB3GS

7, 14, 15, 16, 18, 38, 39, 53, 54

A

accuracy 65

adapter

1, 2, 12, 14

alignment

bar 15 groove 15

Allen-Bradley

40, 71

analog signals

3

B

backplane

7, 15 base unit 15

Belden 8761

55

bipolar 27

bits

CJC alarm 8

CJC fault 33, 52

data format 28, 34

diagnostic 33, 52

EDT 34

EDT command 38

EDT data 38

fault alarm 33, 52

fault mode 34 input type 37

input types 28

overrange alarm 32

reference junction 28 sensor mode 28, 35, 37 sensor type 28, 36

underrange alarm 32

Index block transfer read (BTR)

31,52,59, 60, 61, 62

block transfer write (BTW)

30, 31, 40, 59, 60, 61, 62

C

calibration

CJC 44

cold junction 43, 48, 49

current source 47

EDT command 44, 45

environment 39 equipment 39

gain 44, 46 general 44

manual 40

offset 44, 45, 46

periodic 39

power supply 40, 45 preparation 40

procedure 39

read words 42

setup 41

temperature 39, 40 tools 39, 40 types of 39

using resistors 41

write words 42

cap plug

15

CE Low Voltage Directive

56

certification

CE 56

C-Tick 56 c-UL-us 56

European Zone 2 71

chassis

7, 16, 18, 42

CJC

disconnecting 18, 19

fault 52

sensors 36, 37

alarm bit 8

cold junction

calibration 49

compensation 18, 25, 28, 43

compensators 2, 17

commands

EDT 44

common mode

8

communication

module and adapter 3

CompactLogix

21

compensation

2-wire 25

2-wire with Loop 25

Publication 1794-6.5.12 - September 2011

68

Index

channel loop 29

CJC 30

differential 25 external 25, 36, 37 internal 25, 36, 37

conductors

55

configuration

data format selection 28

fault mode 29

input filter 27 input range 27

input types 28

options 27

parameters 24

reference junction 28

RTD offset 29

sensor mode 28 sensor type 28

connecting wiring

41

connector

current 54

female 10 male 10

controller

21

ControlLogix

21, 57

ControlNet

4, 8, 21

C-Tick

56

current draw

8

current source

calibration 47

D

daisychain

9, 17

data format

bipolar 28 unipolar 28

data table

27

detection

over-range 2 under-range 2 wire-off 2

diagnostics

51, 52

digital module

9

dimensions

54

DIN rail

2, 11

dissipation

power 54

drilling

dimension 13

points 12

Publication 1794-6.5.12 - September 2011

E

EDT

command 32, 45, 46, 47, 48

data response 34

response 46, 48, 49

EFT/B immunity

56

Electronic Data Sheet (EDS)

58

emissions

55

EN 60079-0

71

EN 60079-15

71

enclosure

7

type rating 55

equipment

40

ESD immunity

55

Ethernet

adapter 21

EtherNet/IP

4, 8

explosion hazard

72

F

fault

alarm 33, 52

channel 32

detection 27

EEPROM 52

mode 29

RAM 52

filter

single pole 28

firmware

8

FLEX I/O

39

components 1

millivolt 7, 27, 53

RTD 7, 27, 53

system 12, 39, 40

thermocouple 7, 27, 53

FLEX system

1, 2

FlexBus

3, 10, 11, 12, 15

frequency input

indicators 51

G

gain

39, 40, 46

H

hazardous location

European 71

North American 72

humidity

39

I

indicator

54

input

channels 40

default 28

designators 5

filter 24, 25

range 30

resistive 2

type 36, 37 installation

connecting wiring 10

hazardous location 15

instructions 7

mounting 10

requirements 7

terminal base 12

IP54 protection

71

isolation mode

8

K

keyswitch

7, 14, 15, 54

L

ladder logic

40, 59

latching mechanism

15

Logix system

4 loop compensation

37 low pass

28

M

male connector

10

manual

conventions xii

purpose ix

related x

manual calibration

40

message

fault 40

millivolt

28, 39, 60

calibration 41

wiring 18, 20

module

label 4

status 52

mounting

kit 13

Index

69

wall or panel 12

MSG instructions

4

mV source

2, 28

O

offset calibration

45

ohmmeter

17

open input

54

open sensor

52

overrange

29

P

PLC processors

control file 62, 60

data file 62, 60

PLC-2 60

PLC-2 system 60

PLC 5-250 21, 61, 62

PLC 5 controller 21

power

40

connections 8

external DC 54

operational 7

precision millivolt

45, 46, 47

processor

27, 40

programming

59

Protected Extra Low Voltage (PELV)

56

publications

related x

R

read programming

30

read words

decimal 42 octal 42

overrange bits 33 underrange bits 33

recalibration

39

reference junction

34, 37, 42

default temperature 28

selection 36 related documentation

x

relative humidity

55

Requested Packet Interval (RPI)

23

resistance

28, 35, 36

resolution curve

type B 24, 65 type E 24, 66 type J 24, 66

Publication 1794-6.5.12 - September 2011

70

Index

type K 24, 67

type N 24, 69

type R 24, 68 type S 24, 68 type T 24, 69 type TXK/XKL(L) 24, 70

RF immunity

56

RSLinx

57, 58

RSLogix 5000 software

4, 8, 21, 57

RSLogix 5 software

57

RSNetworx

57, 58

RTD

analog input mapping 31

2-wire 18, 36, 37

3-wire 18, 25, 36, 37

3-wire connection 17

4-wire 18, 25, 36, 37, 41

4-wire connection 17

disconnecting 19

fault mode 29

isolators 19, 30

loop channel compensation 44

mode 29

offset 29, 32, 37, 42

wire pairs 17

S

Safety Extra Low Voltage (SELV)

56

sensor

CJC 36

mode 24, 25, 32, 28, 35, 42

RTD Type 29

RTD type 36

thermocouple type 29, 36 type 24, 32, 28, 29, 35, 36

series A

7, 8, 38 series B

7, 8, 38, 43

shock

55

signal

analog to binary 3

conductors 55

wiring 16

SLC

21

specification

accuracy vs. filter cutoff 53

cold junction compensation 54

common mode input range 53 common mode rejection 53

conducted RF immunity 56

data format 53

DIN rail 11

Publication 1794-6.5.12 - September 2011

emissions 55 enclosure type rating 55

ESD immunity 55

general 53

indicators 54 isolation voltage 54

module location 53 nominal input voltage 53 number of inputs 53

open circuit 54 overall drift with temperature 54 overvoltage capability 54

radiated RF immunity 56

relative humidity 55

resolution 53

supply voltage 54

supported RTD 53 supported thermocouple 53

system throughput 54

temperature 55 vibration 55 wire size 55

status indicator

diagnostic 43

fault 51

power 52

supply voltage

54

surge transient immunity

56

T

T4

55

T4A

55

temperature

ambient 28

code 55

non-operating 55 operating 55

terminal base

1, 2, 7, 10, 13, 55 installation 12

mounting 10

wiring 8

thermal dissipation

54

thermocouple

2, 24, 25, 28, 30, 36, 39, 42, 60

mode 8

resolution curves 65

wiring 18

tools

precision resistors 40 precision voltage source 40 calibration 40 interconnect cable 40

troubleshoot

51

U

unipolar

27

V

vibration

55

voltage

supply 54

W

wire type

55

wire pairs

3-wire RTD 17

4-wire RTD 17 connecting 17

wiring

category 55

combination 9

connections 18, 41

terminal base 8, 41

write words

data format 42

filter time constants 34 input type 36

RTD Type 35 sensor mode 37 sensor type 36

Z

Zone 2

71

Index

71

Publication 1794-6.5.12 - September 2011

72

Index

Notes:

Publication 1794-6.5.12 - September 2011

Index

73

Publication 1794-6.5.12 - September 2011

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com/support/ , you can find technical manuals, a k no w ledge base of FAQs, technical and application notes, sample code and lin k s to soft w are service pac k s, and a MySupport feature that you can customize to ma k e the best use of these tools .

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Use the Worldwide Locator at http://www.rockwellautomation.com/support/americas/phone_en.html

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Supersedes Publication 1794-6.5.12 - November 1997 Copyright © 2011 Rockwell Automation, Inc. All rights reserved.