Rockwell Automation 1794-IF4I, 1794-OF4I, 1794-IF2XOF2I, 1794-IF4IXT, 1794-IF4ICFXT User Manual

...

FLEX I/O Isolated Analog Modules

1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT,

-IF4ICFXT, -OF4IXT, IF2XOF2IXT

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

ATTENTION

Identifies information that is critical for successful application and understanding of the product.

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.

Rockwell Automation, Allen-Bradley, FLEX, RSNetWorx, RSLogix5000, and TechConnect are trademarks of Rockwell Automation, Inc.

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

Using this Manual

Preface

Purpose of this Manual

Audience

Vocabulary

This manual shows you how to use your FLEX I/O Isolated Analog modules with Allen-Bradley programmable controllers. The manual helps you install, program and troubleshoot your modules.

Except where noted, information that applies to 1794-IF4I, 1794-OF4I, and IF2XOF2I also applies to 1794-IF4IXT, 1794-IF4ICFXT, 1794-OF4IXT, and IF2XOF2IXT.

You must be able to program and operate an Allen-Bradley programmable controller to make efficient use of your FLEX I/O modules. In particular, you must know how to program block transfers.

We assume that you know how to do this in this manual. If you do not, refer to the appropriate programming and operations manual before you attempt to program your modules.

In this manual, we refer to:

• the isolated analog input or isolated analog output module as

the “input module” or ‘‘output module”

• the Programmable Controller as the “controller”

Manual Organization

3 Publication 1794-6.5.8 - January 2010

This manual is divided into five chapters. The following chart lists each chapter with its corresponding title and a brief overview of the topics covered in that chapter.

Section Title Contents

Chapter 1 Overview of FLEX I/O and

your Analog Modules

Chapter 2 How to Install Your Analog

Module

Chapter 3 Module Programming Explains block transfer

Describes FLEX I/O Isolated Analog modules, features, and how they function

How to install and wire the modules

programming, sample programs

Preface 4

Section Title Contents

Chapter 4 Writing Configuration to and

Reading Status from Your Module with a Remote I/O Adapter

Chapter 5 Communication and I/O

Image Table Mapping with the DeviceNet/ControlNet Adapter

Chapter 6 Input, Output, Status and

Configuration Files for Analog Modules when used with ControlNet

Chapter 7 Calibrating Your Module Explains how to calibrate

Appendix A Specifications Specifications for the

Appendix B Class I, Division 2, Group A,

B, C, D Hazardous Locations Statement

Explains how to configure your modules and read status information from your modules when using a remote I/O adapter

Explains how you communicate with your modules, and how the I/O image is mapped when using a DeviceNet adapter

Explains how you communicate with your modules over ControlNet.

your module.

isolated analog modules Hazardous location approval

Common Techniques Used in this Manual

For Additional Information

Catalog Numbers Voltage Description Publications

1794 1794 FLEX I/O Product Data 1794-2.1 1794-ACN 24V dc ControlNet Adapter 1794-5.8 1794-ACNR 24V dc Redundant Media ControlNet Adapter 1794-5.18 1794-ADN 24V dc DeviceNet Adapter 1794-5.14 1794-6.5.5 1794-ASB/C 24V dc Remote I/O Adapter 1794-5.46 1794-6.5.9

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.

For additional information on FLEX I/O systems and modules, refer to the following documents:

Installation Instructions

User Manual

Publication 1794-6.5.8 - January 2010

Catalog Numbers Voltage Description Publications

Preface 5

Installation Instructions

1794-ASB2 24V dc 2-Slot Remote I/O Adapter 1794-5.44 1794-6.5.3 1794-TB2

1794-TB3 1794-TBN Terminal Base Unit 1794-5.16 1794-TBNF Fused Terminal Base Unit 1794-5.17 1794-TB3T Temperature Terminal Base Unit 1794-5.41 1794-TB3S Spring Clamp Terminal Base Unit 1794-5.42 1794-TB3TS Spring Clamp Temperature Terminal Base

1794-IB16 24V dc 16 Sink Input Module 1794-5.4 1794-OB16 24V dc 16 Source Output Module 1794-5.3 1794-IV16 24V dc 16 Source Input Module 1794-5.28 1794-OV16 24V dc 16 Sink Output Module 1794-5.29 1794-OB8EP 24V dc 8 Electronically Fused Output Module 1794-5.20 1794-OW8 24V dc 8 Output Relay Module 1794-5.19 1794-IB10XOB6 24V dc 10 Input/6 Output Module 1794-5.24 1794-IE8 24V dc Selectable Analog 8 Input Module 1794-5.6 1794-OE4 24V dc Selectable Analog 4 Output Module 1794-5.5 1794-6.5.2 1794-IE4XOE2 24V dc 4 Input/2 Output Analog Module 1794-5.15

2-wire Terminal Base 3-wire Terminal Base

Unit

1794-5.2

1794-5.43

User Manual

Summary

1794-IR8 24V dc 8 RTD Input Analog Module 1794-5.22 1794-6.5.4 1794-IT8 24V dc 8 Thermocouple Input Module 1794-5.21 1794-6.5.7 1794-IB8S 24V dc Sensor Input Module 1794-5.7 1794-IA8 120V ac 8 Input Module 1794-5.9 1794-OA8 120V ac Output Module 1794-5.10 1794-CE1, -CE3 Extender Cables 1794-5.12 1794-NM1 Mounting Kit 1794-5.13 1794-PS1 24V dc Power Supply 1794-5.35 1794-PS13 24V dc Power Supply 1794-5.69

This preface gave you information on how to use this manual efficiently. The next chapter introduces you to the remote I/O adapter module.

Publication 1794-6.5.8 - January 2010

Preface 6

Publication 1794-6.5.8 - January 2010

Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Preface

Using this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Vocabulary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Manual Organization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Common Techniques Used in this Manual . . . . . . . . . . . . . . . 4

For Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table of Contents Chapter Overview of FLEX I/O and your Analog Modules

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

The FLEX I/O System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Types of FLEX I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . 12

How FLEX I/O Analog Modules Communicate with

Programmable Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Features of Your Analog Modules . . . . . . . . . . . . . . . . . . . . 14

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Chapter

How to Install Your Analog Module

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Before You Install Your Analog Module. . . . . . . . . . . . . . . . 15

Compliance to European Union Directives . . . . . . . . . . . . . . 15

EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Low Voltage Directive (to be confirmed). . . . . . . . . . . . . 16

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Installing the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Mounting the Terminal Base Unit on a DIN Rail . . . . . . . 18

Panel/Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Mounting the Analog Module on the Terminal Base Unit. 22

Connecting Wiring for the Analog Modules . . . . . . . . . . . . . 23

Connecting Wiring using a 1794-TB3, -TB3T, -TB3S or -TB3TS

Terminal Base Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Wiring to a 1794-TBN or 1794-TBNF Terminal Base Unit . 26

Module Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Chapter

Module Programming

7 Publication 1794-6.5.8 - January 2010

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Block Transfer Programming . . . . . . . . . . . . . . . . . . . . . . . . 31

Configuration Rungs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Example Configuration Rungs. . . . . . . . . . . . . . . . . . . . . 32

Sample Programs for FLEX I/O Analog Modules. . . . . . . . . . 33

PLC-3 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

PLC-5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

PLC-2 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

SLC-5 Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table of Contents 8

Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Chapter

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Configuring Your Analog Module . . . . . . . . . . . . . . . . . . . . 53

Range Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Safe State Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Real Time Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Input Filtering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Reading Data From Your Module. . . . . . . . . . . . . . . . . . . . . 57

Mapping Data for the Analog Modules. . . . . . . . . . . . . . . . . 57

8 Input Analog Module (Cat. No. 1794-IF4I) . . . . . . . . . . 58

4 Isolated Output Analog Module (Cat. No. 1794-OF4I) . . 64

2 Input/2 Output Analog Combo Module (Cat. No.

1794-IF2XOF2I) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Communication and I/O Image Table Mapping with the DeviceNet/ControlNet Adapter

Input, Output, Status and Configuration Files for Analog Modules when used with ControlNet

Chapter

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

About RSNetWorx and RSLogix . . . . . . . . . . . . . . . . . . . . . . 77

Polled I/O Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Adapter Input Status Word . . . . . . . . . . . . . . . . . . . . . . . 78

Mapping Data into the Image Table. . . . . . . . . . . . . . . . . . . 79

4 Input Isolated Analog Module (Cat. No. 1794-IF4I) Image

Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

4 Output Isolated Analog Module (Cat. No. 1794-OF4I) Image

Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Isolated Analog Combo Module (Cat. No. 1794-IF2XOF2I

Series B) Image Table Mapping . . . . . . . . . . . . . . . . . . . 91

Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Chapter

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

About the ControlNet Adapter . . . . . . . . . . . . . . . . . . . . . . . 99

Commun ication Over the FLEX I/O Backplane . . . . . . . . . . 99

Polled I/O Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Adapter Input Status Word . . . . . . . . . . . . . . . . . . . . . . 101

Safe State Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Communication Fault Behavior . . . . . . . . . . . . . . . . . . . . . 102

Idle State Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Input Data Behavior Upon Module Removal . . . . . . . . . . . 103

4 Input Isolated Analog Module (Cat. No. 1794-IF4I) Image

Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Publication 1794-6.5.8 - January 2010

Calibrating Your Module

Table of Contents 9

4 Output Isolated Analog Module (Cat. No. 1794-OF4I) Image

Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Isolated Analog Combo Module (Cat. No. 1794-IF2XOF2I)

Image Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . 113

Chapter

Chapter Objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

When and How to Calibrate Your Isolated Analog Module . 119

Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Calibrating Your Isolated Analog Input Module . . . . . . . . . 121

Bits Used During Calibration . . . . . . . . . . . . . . . . . . . . 121

Offset Calibration for Inputs . . . . . . . . . . . . . . . . . . . . . 122

Setting the Input Gain . . . . . . . . . . . . . . . . . . . . . . . . . 124

Calibrating Your Isolated Analog Output Module . . . . . . . . 125

Bits Used During Calibration . . . . . . . . . . . . . . . . . . . . 125

Calibrating Voltage Outputs . . . . . . . . . . . . . . . . . . . . . 126

Offset Calibration for Voltage Outputs 126 Gain Calibration for Outputs 127

Calibrating Current Outputs . . . . . . . . . . . . . . . . . . . . . 128

Gain Calibration for Current Outputs 128 Offset Calibration for Current Outputs 128 Final Gain Calibration for Current Inputs 130

Scaling Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Scaling Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Specifications

Class I, Division 2, Group A, B, C, D Hazardous Locations Statement Index

Appendix

Filter Response for 150Hz, 300Hz and 600Hz Conversion 134

Appendix

Publication 1794-6.5.8 - January 2010

Table of Contents 10

Publication 1794-6.5.8 - January 2010

Chapter

Overview of FLEX I/O and your Analog Modules

Chapter Objectives

The FLEX I/O System

Adapter Terminal Base I/O Module

In this chapter, we tell you about:

• what the FLEX I/O system is and what it contains

• types of FLEX I/O analog modules

• how FLEX I/O analog modules communicate with

programmable controllers

• the features of your analog modules

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 I/O system contains the following components shown in

Figure 1.1

Figure 1.1:

20125

• adapter/power supply – powers the internal logic for as many as

eight I/O modules

• 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

11 Publication 1794-6.5.8 - January 2010

12 Overview of FLEX I/O and your Analog Modules

Types of FLEX I/O Modules

Catalog Number Voltage Inputs Outputs Description

1794-IF4I 24V dc 4 – analog – 4 input, isolated

1794-OF4I 24V dc – 4 analog – 4 output, isolated

1794-IF2XOF2I 24V dc 2 2 analog – 2 input, isolated and 2 output, isolated

We describe the following FLEX I/O Analog modules in this user manual:

FLEX I/O analog input, output and combination modules are block transfer modules that interface analog signals with any Allen-Bradley programmable controllers that have block transfer capability. Block transfer programming moves input from the module’s memory to a designated area in the processor data table, and output data words from a designated area in the processor data table to the module’s memory. Block transfer programming also moves configuration words from the processor data table to module memory.

The analog modules have selectable ranges as shown in the table below:

Input Values Data Format Underrange/Overrange

4–20mA signed 2’s complement 4% Underrange, 4% Overrange ±10V signed 2’s complement 2% Underrange, 2% Overrange ±5V signed 2’s complement 4% Underrange, 4% Overrange 0–20mA signed 2’s complement % 0% Underrange, 4% Overrange 4-20mA signed 2’s complement % 4% Underrange, 4% Overrange 0–10V signed 2’s complement % 0% Underrange, 2% Overrange ±10V signed 2’s complement % 2% Underrange, 2% Overrange 0–20mA binary 0% Underrange, 4% Overrange 4–20mA binary 4% Underrange, 4% Overrange 0–10V binary 0% Underrange, 2% Overrange 0–5V binary 0% Underrange, 4% Overrange ±20mA offset binary, 8000H = 0mA 4% Underrange, 4% Overrange 4–20mA offset binary, 8000H = 4mA 4% Underrange, 4% Overrange ±10V offset binary, 8000H = 0V 2% Underrange, 2% Overrange ±5V offset binary, 8000H = 0V 4% Underrange, 4% Overrange

Publication 1794-6.5.8 - January 2010

Overview of FLEX I/O and your Analog Modules 13

How FLEX I/O Analog Modules Communicate with Programmable Controllers

The adapter transfers your configuration data to the module using a BTW.

Allen-Bradley

ADAPTER

ACTIVE FAULT

LOCAL FAULT

POWER SUPPLY

RIO ADAPTER

1794-ASB

24VDC

The adapter/power supply transfers data to the module (block transfer write) and from the module (block transfer read) using BTW and BTR instructions in your ladder diagram program. These instructions let the adapter obtain input values and status from the module, and let you send output values and establish the module’s mode of operation. Figure 1.2 describes the communication process.

Figure 1.2 An Example of Communication Between an Adapter and an Analog Input Module

Flexbus

Your ladder program instructs the adapter to perform a BTR of the values and stores them in a data table.

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

Allen-Bradley

ANALOG INPUT

INPUT 0INPUT 2 INPUT 4 INPUT 6INPUT 1 INPUT 3 INPUT 5 INPUT 7

VI VI VI VI VI VI VI V

External devices transmit analog signals to the module.

1794±IE8

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

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

Your ladder program performs BTWs to the module when you power it up, and any time you wish to reconfigure the module.

Publication 1794-6.5.8 - January 2010

14 Overview of FLEX I/O and your Analog Modules

Features of Your Analog Modules

Each module has a unique label identifying its keyswitch position, wiring and module type. A removable label provides space for writing individual designations per your application.

1794-IF4I

Module Type

Removable Label

Keyswitch Position Indicator (#3)

Input Designators

1794-OF4I

Output Designators

Green Power/Status Indicator

Module Type

Removable Label

Keyswitch Position Indicator (#4)

Green Power/Status Indicator

Summary

1794-IF2XOF2I

Module Type

Removable Label

Keyswitch Position Indicator (#5)

Input and Output Designators

Green Power/Status Indicator

In this chapter you learned about the FLEX I/O system and the types of analog modules and how they communicate with programmable controllers.

Publication 1794-6.5.8 - January 2010

How to Install Your Analog Module

Chapter

Chapter Objectives

Before You Install Your Analog Module

Compliance to European Union Directives

In this chapter, we tell you about:

• how to install your module

• how to set the module keyswitch

• how to wire the terminal base

• the indicators

Before installing your analog module in the I/O chassis:

You need to: As described under:

Calculate the power requirements of all modules in each chassis.

Position the keyswitch on the terminal base Mounting the Analog Module on the

If this product has the CE mark it is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.

Power Requirements, page 2-16

Terminal Base Unit, page 2-22

EMC Directive

This product is tested to meet Council Directive 2004/10/EC Electromagnetic Compatibility (EMC) and the following standards, in whole or in part, documented in a technical construction file:

• 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)

• European Union 2006/95/EC LVD, compliant with: EN 61131-2; Programmable Controllers (Clause 11)

This product is intended for use in an industrial environment.

15 Publication 1794-6.5.8 - January 2010

16 How to Install Your Analog Module

Low Voltage Directive

This product is tested to meet Council Directive 2006/95/EC Low Voltage, by applying the safety requirements of EN 61131–2 Programmable Controllers, Part 2 – Equipment Requirements and Tests.

For specific information required by EN 61131-2, see the appropriate sections in this publication, as well as the following Allen-Bradley publications:

• Industrial Automation Wiring and Grounding Guidelines For Noise Immunity, publication 1770-4.1

• Guidelines for Handling Lithium Batteries, publication AG-5.4

• Automation Systems Catalog, publication B111

Open style devices must be provided with environmental and safety protection by proper mounting in enclosures designed for specific application conditions. See NEMA Standards publication 250 and IEC publication 529, as applicable, for explanations of the degrees of protection provided by different types of enclosure.

Power Requirements

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 10A.

ATTENTION

Total current draw through the terminal base unit is limited to 10A. Separate power connections may be necessary.

Publication 1794-6.5.8 - January 2010

How to Install Your Analog Module 17

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

Daisy-chaining

Individual

ATTENTION

24V dc

Do not daisy chain power or ground from an analog terminal base unit to any ac or dc discrete module terminal base unit.

Note: All modules must be analog modules for this configuration.

Wiring

when total current draw is less than 10A

Combination

24V dc

24V dc or 120V ac

24V dc

Analog module wiring separate from discrete wiring.

iring when total current draw is greater than 10A

Note: All modules powered by the same power supply must be analog modules for this configuration.

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

Note: Use this configuration if using any ªnoisyº dc discrete I/O modules in your system.

Publication 1794-6.5.8 - January 2010

18 How to Install Your Analog Module

Installing the Module

Installation of the analog module consists of:

• mounting the terminal base unit

• installing the analog 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

Mounting the Analog Module on the

Terminal Base Unit on page 2-22.

Mounting the Terminal Base Unit on a DIN Rail

ATTENTION

1. Remove the cover plug (if used) in the male connector of the

unit to which you are connecting this terminal base unit.

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.

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.

3. Position the terminal base on the 35 x 7.5mm DIN rail A (A-B pt. no. 199-DR1; 46277-3; EN 50022) at a slight angle with hook B on the left side of the terminal base hooked into the right side of the unit on the left. Proceed as follows:

Figure 2.1

Position terminal base at a slight angle and hooked over the top of the DIN rail.

Publication 1794-6.5.8 - January 2010

Figure 2.2

How to Install Your Analog Module 19

Slide the terminal base unit over tight against the adapter. Make sure the hook on the terminal base slides under the edge of the adapter and the flexbus connector is fully retracted.

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.

Gently push the flexbus connector into the side of the adapter to complete the backplane connection.

4. Repeat steps 1 - 3 to install the next terminal base.

Publication 1794-6.5.8 - January 2010

30077-M

20 How to Install Your Analog Module

Panel/Wall Mounting

Installation 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 “Mounting the Analog Module on the Terminal Base” on .

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

1794-NM1

1 ± Mounting Plate for Adapter 2 ± 18 #6 self-tapping screws

(2 for the adapter, and 2 each for up to 8 modules)

Mounting Kit

Contents:

Adapter Module (not included)

Terminal Base Unit

(not included)

Publication 1794-6.5.8 - January 2010

How to Install Your Analog Module 21

To install the mounting plate on a wall or panel:

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

Figure 2.3 Drilling Dimensions for Panel/Wall Mounting of FLEX I/O

Inches (Millimeters)

.83 (21)

1.4 (35.5)

2.3 (58.5)

1.4 (35.5)

2.3 (58.5)

1.4 (35.5)

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

3. Mount the mounting plate (1) for the adapter module using two #6 self-tapping screws (18 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 (2) 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.

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

Publication 1794-6.5.8 - January 2010

22 How to Install Your Analog Module

Mounting the Analog Module on the Terminal Base Unit

1. Rotate the keyswitch (1) on the terminal base unit (2) clockwise to the position required for the specific type of analog module.

Figure 2.4

Analog Module Catalog Number Keyswitch Position

1794-IF4I, 1794-IF4IXT, 1794-IF4ICFXT 3

1794-OF4I, 1794-OF4IXT 4

1794-IF2XOF2I, 1794-IF2XOF2IXT 5

2. Make certain the flexbus connector (3) is pushed all the way to the left to connect with the neighboring terminal base/adapter.

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

3. Make sure that the pins on the bottom of the module are straight

so they will align properly with the connector in the terminal base unit.

4. Position the module (4) with its alignment bar (5) aligned with the groove (6) on the terminal base.

Publication 1794-6.5.8 - January 2010

5. Press firmly and evenly to seat the module in the terminal base unit. The module is seated when the latching mechanism (7) is locked into the module.

How to Install Your Analog Module 23

6. Repeat the above steps to install the next module in its terminal base unit.

Connecting Wiring for the Analog Modules

ATTENTION

Remove field-side power before removing or inserting the module. This module is designed so you can remove and insert it under backplane power. When you remove or insert a module with field-side power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by:

• sending an erroneous signal to your system’s field

devices causing unintended machine motion

• causing an explosion in a hazardous environment

Repeated electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance.

Wiring to the analog modules is made through the terminal base unit on which the module mounts.

Refer to the following table for recommended terminal base units that you can use for each module.

Module 1794-TB3 1794-TBT 1794-TB3S 1794-TB3TS 1794-TB3S 1794-TBN,

-TBNF

1794-IF4I, 1794-IF4IXT,

1794-IF4ICFXT

1794-OF4I, 1794-OF4IXT Yes Yes Yes Yes Yes Yes

1794-IF2XOF2I,

1794-IF2XOF2IXT

Yes Yes Yes Yes Yes Yes

Figure 2.5

1794-TB3, -TB3T 1794-TB3S, -TB3TS 1794-TBNF 1794-TBN

Publication 1794-6.5.8 - January 2010

24 How to Install Your Analog Module

Connecting wiring for the individual analog modules is shown on:

Module Connecting Wiring

1794-IF4I, 1794-IF4IXT, 1794-IF4ICFXT page 2-26

1794-OF4I, 1794-OF4IXT

1794-IF2XOF2I, 1794-IF2XOF2IXT page 2-27

Connecting Wiring using a 1794-TB3, -TB3T, -TB3S or -TB3TS Terminal Base Unit

1. Connect the individual signal wiring to numbered terminals on the 0–15 row (A) on the terminal base unit. (Use Belden 8761 cable for signal wiring.)

ATTENTION

Connect only one current or one voltage signal per channel. Do not connect both current and voltage on one channel.

2. Connect each channel signal return to:

1794-IF4I – the associated terminal on row A.

1794-OF4I – the corresponding terminal on the same row (A)

1794-IF4XOF2I – inputs – the associated terminal on row A; outputs – the corresponding terminal on the same row (A).

3. Refer to Table 2.1 or Table 2.2. Connect +24V dc to designated terminals on the 34-51 row (C), and 24V common todesignated terminals on the 16–33 row (B).

ATTENTION

To reduce susceptibility to noise, power analog modules and discrete modules from separate power supplies. Do not exceed a length of 33 ft (10m) for dc power cabling.

Publication 1794-6.5.8 - January 2010

How to Install Your Analog Module 25

ATTENTION

• sending an erroneous signal to your system’s field

devices causing unintended machine motion

• causing an explosion in a hazardous environment

Repeated electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance.

±15

A B C

0 16±33 34±51

1794-TB3, -TB3T

Row A Row B Row C

Row A

Row B

Row C

1794-TB3S, -TB3TS

4. If daisy chaining the +24V dc power to the next base unit, connect a jumper from terminal 51 on this base unit to terminal 34 on the next base unit. Connect the 24V dc common/return from terminal 33 on this base unit to terminal 16 on the next base unit.

Publication 1794-6.5.8 - January 2010

26 How to Install Your Analog Module

Wiring to a 1794-TBN or 1794-TBNF Terminal Base Unit

1. Connect individual input or output wiring to the even numbered terminals on row (B) as indicated in the table below.

2. Connect the associated return wiring to the corresponding odd numbered terminal on row (C) for each input or output as indicated in the table below.

3. Connect 24V dc to terminal 34 on row (C).

4. Connect 24V dc common to terminal 16 on row (B).

5. If continuing power to the next terminal base unit, connect a

jumper from terminal 51 (24V dc) on this base unit to terminal 34 on the next base unit.

16 33Even

0246810121433

13 57 9 11131551

34 51

Numbered T

Odd Numbered Terminals 1 thru 15

erminals 0 thru 14

1794-TBN, 1794-TBNF

16,

0, 2, 4, 6,

8, 10, 12, 14, 33

34, 1, 3, 5, 7, 9, 11, 13, 15, 51

If continuing common to the next terminal base unit, connect a jumper from terminal 33 (24V dc common) on this base unit to termi

nal 16 on the next base unit.

Table 2.1

Wiring connections for 1794-TB3, -TB3T, -TB3S, -TB3TS, -TBN and -TBNF Terminal Base Units when using the 1794-IF4I or 1794-OF4I Isolated Analog Module

Channel Signal Type Label Markings

0 Current I0 0

Current I0 Ret 1 Voltage V0 2 Voltage V0 Ret 3

1 Current I1 4

1794-TB3, -TB3T1, -TB3S, -TB3TS 1794-TBN, 1794-TBNF

Signal

Signal Return

Term in al

(2)

Publication 1794-6.5.8 - January 2010

Current I1 Ret 5 Voltage V1 6 Voltage V1 Ret 7

How to Install Your Analog Module 27

Table 2.1

Wiring connections for 1794-TB3, -TB3T, -TB3S, -TB3TS, -TBN and -TBNF Terminal Base Units when using the 1794-IF4I or 1794-OF4I Isolated Analog Module

Channel Signal Type Label Markings

1794-TB3, -TB3T1, -TB3S, -TB3TS 1794-TBN, 1794-TBNF

Signal

Signal Return

Term in al

2 Current I2 8

Current I2 Ret 9 Voltage V2 10 Voltage V2 Ret 11

3 Current I3 12

Current I3 Ret 13 Voltage V3 14 Voltage V3 Ret 15

24V dc Common

1794-TB3 – 16 through 33

(1)

1794-TB3T, -TB3TS – 17, 18, 33

1794-TBN, -TBNF – 16 and 33

+24V dc power 1794-TB3 – 34 thru 51

1794-TB3T, -TB3TS – 34, 35, 50, 51

1794-TBN, -TBNF – 34 and 51

(1)

Terminals 16 thru 33 are internally connected in the terminal base unit.

(2)

Terminal 39 through 46 are chassis ground. Terminals 36, 37, 38 and 47, 48, 49 are used or cold junction compensation.

(2)

Table 2.2

Wiring connections for the 1794-IF2XOF2I Isolated Analog Module when using 1794-TB3,

-TB3T, -TB3S, -TB3TS, -TBN and -TBNF Terminal Base Units

Channel Signal Type Label Markings

1794-TB3, -TB3T

(2)

-TB3TS

Signal

(2)

, -TB3S,

-TBN, -TBNF

Signal Return

Term in al

Input 0 Current I0 0

Current I0 Ret 1 Voltage V0 2 Voltage V0 Ret 3

Input 1 Current I1 4

Current I1 Ret 5 Voltage V1 6 Voltage V1 Ret 7

Publication 1794-6.5.8 - January 2010

28 How to Install Your Analog Module

Table 2.2

Wiring connections for the 1794-IF2XOF2I Isolated Analog Module when using 1794-TB3,

-TB3T, -TB3S, -TB3TS, -TBN and -TBNF Terminal Base Units

Channel Signal Type Label Markings

Output 0 Current I2 8

Current I2 Ret 9 Voltage V2 10 Voltage V2 Ret 11

Output 1 Current I3 12

Current I3 Ret 13 Voltage V3 14 Voltage V3 Ret 15

24V dc Common

1794-TB3 – 16 thru 33

1794-TB3T, -TB3TS – 17, 18, 33

1794-TBN, -TBNF – 16 and 33

+24V dc power 1794-TB3 – 34 thru 51

1794-TB3T, -TB3TS – 34, 35, 50, 51

1794-TBN, -TBNF – 34 and 51

1794-TB3, -TB3T

(2)

-TB3TS

-TBN, -TBNF

Signal Term in al

(2)

, -TB3S,

Signal Return

(1)

Terminals 16 thru 33 are internally connected in the terminal base unit.

(2)

Terminal 39 through 46 are chassis ground. Terminals 36, 37, 38 and 47, 48, 49 are used or cold junction compensation.

ATTENTION

Total current draw through the terminal base unit is limited to 10A. Separate power connections to the terminal base unit may be necessary.

Publication 1794-6.5.8 - January 2010

1794-IF4I

Figure 2.6

Connections ± 1794-TB3 terminal base shown

How to Install Your Analog Module 29

0 ±15

16±33

34±51

1794-OF4I

I I I I

+±

Current

Input

+±

ac or dc

4-Wire Current

Transmitter

Current

Input

dc only

3-Wire Current

Transmitter

Connections ± 1794-TB3 terminal base shown

+±

Current Output Device

+±

I I

Current Output Device

±±

Current

Input

Current only

2-Wire Current

Transmitter and External

Power Supply

Current

±±

Output Device

24V

Power Supply

Voltage

Input

dc only

3-Wire

Transmitter

Voltage Output Device

±±

0 ±15

16±33

34±51

1794-IF2XOF2I

ac or dc

4-Wire Output

Device

dc only

3-Wire Output

Device

Connections ± 1794-TB3 terminal base shown

I I

+±

Current

Input

+±

ac or dc

4-Wire Current

Transmitter

Current

Input

dc only

3-Wire Current

Transmitter

±±

Current only

2-Wire Output

Device

Current Output Device

Current only

2-Wire Output

Device

dc only

3-Wire Output

Device

Voltage Output Device

dc only

3-Wire Output

Device

Publication 1794-6.5.8 - January 2010

0 ±15

16±33

34±51

30 How to Install Your Analog Module

Module Indicators

The analog modules have one status indicator that is on when power is applied to the module.

1794-IF4I

1794-OF4I

OK Status Indicator ± Indicates power applied to module and status. When flashing, examine module status word.

1794-IF2XOF2I

Chapter Summary

Publication 1794-6.5.8 - January 2010

In this chapter you learned how to install your input module in an existing programmable controller system and how to wire to the terminal base units.

+ 117 hidden pages