Rockwell Automation 1769-OF2 User Manual

Compact I/O Analog Modules

1769-IF4, -IF8, -OF2, -OF8C, and

-OF8V

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://www.ab.com/manuals/gi) 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 we use notes to make you aware of safety considerations.

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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.

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

• recognize the consequence

Labels may be located on or inside the drive to alert people that dangerous voltage may be present.

Labels may be located on or inside the drive to alert people that surfaces may be dangerous temperatures.

Summary of Changes

The 1769-IF8, -OF8C, and -OF8V modules have been added to this manual since the last printing.

To help you find new and updated information in this release of the manual, we have included change bars as shown next to this paragraph.

1 Publication 1769-UM002B-EN-P - July 2005

Summary of Changes 2

Notes:

Publication 1769-UM002B-EN-P - July 2005

Overview

Preface

Who Should Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . Preface-1

How to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface-1

Manual Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface-1

Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface-2

Conventions Used in This Manual . . . . . . . . . . . . . . . . . . . . . . Preface-2

Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . . . . Preface-3

Local Product Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface-3

Technical Product Assistance . . . . . . . . . . . . . . . . . . . . . . . Preface-3

Your Questions or Comments on the Manual. . . . . . . . . . Preface-3

Chapter 1

How to Use Analog I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Hardware Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

General Diagnostic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

System Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Module Field Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Installation and Wiring

Chapter 2

Compliance to European Union Directives . . . . . . . . . . . . . . . . . . . . 2-1

EMC Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Low Voltage Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Hazardous Location Considerations. . . . . . . . . . . . . . . . . . . . . . . 2-3

Prevent Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Remove Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Reducing Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Protecting the Circuit Board from Contamination . . . . . . . . . . . 2-4

System Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Minimum Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

DIN Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Replacing a Single Module within a System . . . . . . . . . . . . . . . . . . . . 2-9

External Power Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

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Table of Contents ii

Module Data, Status, and Channel Configuration for the Input Modules

Field Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

System Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Labeling the Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Removing the Finger-Safe Terminal Block . . . . . . . . . . . . . . . . 2-15

Wiring the Finger-Safe Terminal Block . . . . . . . . . . . . . . . . . . . 2-16

Wiring the Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Terminal Door Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Analog Input Modules Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Analog Output Modules Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Chapter 3

1769-IF4 Input Module Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

1769-IF4 Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

1769-IF4 Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

1769-IF4 Input Data File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

1769-IF4 Input Data Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

1769-IF4 Configuration Data File. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Enable/Disable Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Input Filter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Input Type/Range Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Input Data Selection Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Effective Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

1769-IF8 Input Module Addressing . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

1769-IF8 Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

1769-IF8 Output Image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

1769-IF8 Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

1769-IF8 Input Data File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

1769-IF8 Input Data Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

1769-IF8 Output Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

1769-IF8 Configuration Data File. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Enable/Disable Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Input Filter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Input Type/Range Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

Input Data Selection Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

1769-IF8 Real Time Sampling. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

1769-IF8 Process Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30

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Module Data, Status, and Channel Configuration for the Output Modules

Table of Contents iii

Chapter 4

1769-OF2 Output Module Memory Map. . . . . . . . . . . . . . . . . . . . . . 4-1

1769-OF2 Output Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

1769-OF2 Input Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

1769-OF2 Diagnostic Bits (D0 and D1). . . . . . . . . . . . . . . . . . . . 4-2

1769-OF2 Hold Last State Bits (H0 and H1). . . . . . . . . . . . . . . . 4-2

1769-OF2 Over-Range Flag Bits (O0 and O1) . . . . . . . . . . . . . . 4-3

1769-OF2 Under-Range Flag Bits (U0 and U1). . . . . . . . . . . . . . 4-3

1769-OF2 General Status Bits (S0 and S1). . . . . . . . . . . . . . . . . . 4-3

1769-OF2 Output Data Loopback/Echo . . . . . . . . . . . . . . . . . . 4-4

1769-OF2 Configuration Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

1769-OF2 Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . 4-6

1769-OF2 Enable/Disable Channel . . . . . . . . . . . . . . . . . . . . . . . 4-7

1769-OF2 Output Data Format Selection . . . . . . . . . . . . . . . . . . 4-7

1769-OF2 Output Type/Range Selection . . . . . . . . . . . . . . . . . . 4-8

1769-OF2 Fault Mode (FM0 and FM1) . . . . . . . . . . . . . . . . . . . . 4-8

1769-OF2 Program/Idle Mode (PM0 and PM1). . . . . . . . . . . . . 4-9

1769-OF2 Program/Idle to Fault Enable (PFE0 and PFE1) . . 4-10

1769-OF2 Fault Value (Channel 0 and 1). . . . . . . . . . . . . . . . . . 4-11

1769-OF2 Program/Idle Value (Channel 0 and 1) . . . . . . . . . . 4-11

1769-OF2 Module Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

1769-OF8C Output Module Memory Map . . . . . . . . . . . . . . . . . . . 4-16

1769-OF8V Output Module Memory Map . . . . . . . . . . . . . . . . . . . 4-17

1769-OF8C and -OF8V Output Data File . . . . . . . . . . . . . . . . . . . . 4-18

Channel Alarm Unlatch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

1769-OF8C and -OF8V Input Data File . . . . . . . . . . . . . . . . . . . . . 4-19

1769-OF8C and -OF8V Data Values . . . . . . . . . . . . . . . . . . . . . 4-19

1769-OF8C and -OF8V Output Data Loopback/Echo . . . . . . 4-21

1769-OF8C and -OF8V Configuration Data File . . . . . . . . . . . . . . 4-22

1769-OF8C and -OF8V Channel Configuration . . . . . . . . . . . . 4-24

1769-OF8C and -OF8V Enable/Disable Channel . . . . . . . . . . 4-25

Clamping/Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

Clamp/Limit Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26

Ramping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26

Hold for Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28

Open Wire Detection (1769-OF8C Only) . . . . . . . . . . . . . . . . . 4-29

1769-OF8C and -OF8V Fault Mode (FM). . . . . . . . . . . . . . . . . 4-29

1769-OF8C and -OF8V Program/Idle Mode (PM) . . . . . . . . . 4-30

1769-OF8C and -OF8V Program/Idle to Fault Enable (PFE). 4-31

1769-OF8C and -OF8V Fault Value . . . . . . . . . . . . . . . . . . . . . 4-31

1769-OF8C and -OF8V Program/Idle Value . . . . . . . . . . . . . . 4-32

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Module Diagnostics and Troubleshooting

Chapter 5

Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Activating Devices When Troubleshooting . . . . . . . . . . . . . . . . . 5-1

Stand Clear of the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Program Alteration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Safety Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Module Operation vs. Channel Operation . . . . . . . . . . . . . . . . . . . . . 5-2

Power-up Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Channel Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Out-of-Range Detection (Input and Output Modules) . . . . . . . . 5-3

Open-Circuit Detection (Input Modules Only) . . . . . . . . . . . . . . 5-3

Output Wire Broken/High Load Resistance

(Output Modules Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Non-critical vs. Critical Module Errors. . . . . . . . . . . . . . . . . . . . . . . . 5-4

Module Error Definition Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Module Error Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Extended Error Information Field . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Module Inhibit Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Contacting Rockwell Automation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Specifications

Module Addressing and Configuration with MicroLogix 1500

Configuration Using the RSLogix 5000 Generic Profile for CompactLogix Controllers

Appendix A

General Specifications for 1769-IF4, -IF8, -OF2, -OF8C,

and -OF8V Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

1769-IF4 Input Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

1769-IF8 Input Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

1769-OF2 Output Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

1769-OF8C Output Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

1769-OF8V Output Specifications . . . . . . . . . . . . . . . . . . . . . . . . . A-11

Appendix B

Input Module Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Input Modules Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Input Modules’ Configuration File . . . . . . . . . . . . . . . . . . . . . . . . B-3

Configuring Analog I/O Modules in a MicroLogix 1500 System . . . B-4

Configuring the Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . B-6

Configuring the Output Modules . . . . . . . . . . . . . . . . . . . . . . . . . B-7

Appendix C

Configuring I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

Configuring Analog Output Modules. . . . . . . . . . . . . . . . . . . . . . C-7

Configuring Analog Input Modules . . . . . . . . . . . . . . . . . . . . . . . C-7

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Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter

Two’s Complement Binary Numbers

Table of Contents v

Appendix D

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Add the DeviceNet Adapter to the Scanlist . . . . . . . . . . . . . . . . . . . D-2

Configure the 1769-IF4 Input Module Example . . . . . . . . . . . . . . . D-4

1769-IF4 Example of External Power . . . . . . . . . . . . . . . . . . . . D-6

Configure the 1769-OF8C Output Module Example . . . . . . . . . . . D-7

1769-OF8C Example of External Power . . . . . . . . . . . . . . . . . . D-8

1769-OF8C Example of Output Channels. . . . . . . . . . . . . . . . . D-9

Appendix E

Positive Decimal Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1

Negative Decimal Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2

Glossary

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Table of Contents vi

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Preface

Read this preface to familiarize yourself with the rest of the manual. This preface covers the following topics:

• who should use this manual

• how to use this manual

• related publications

• conventions used in this manual

• Rockwell Automation support

Who Should Use This Manual

How to Use This Manual

Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Allen-Bradley Compact™ I/O.

As much as possible, we organized this manual to explain, in a task-by-task manner, how to install, configure, program, operate and troubleshoot a control system using the 1769 analog I/O modules.

Manual Contents

If you want... See

An overview of the analog input and output modules Chapter 1

Installation and wiring guidelines Chapter 2

Input module addressing, configuration and status information Chapter 3

Output module addressing, configuration and status information Chapter 4

Information on module diagnostics and troubleshooting Chapter 5

Specifications for the input and output modules Appendix A

Information on addressing and configuration using MicroLogix 1500 and RSLogix 500

Information on configuring the module using CompactLogix and RSLogix 5000

Information on configuring the module using 1769-ADN DeviceNet Adapter and RSNetWorx

Information on understanding two’s complement binary numbers Appendix E

Definitions of terms used in this manual Glossary

1 Publication 1769-UM002B-EN-P - July 2005

Appendix B

Appendix C

Appendix D

Conventions Used in This Manual

Publication 1769-UM002B-EN-P - July 2005

The following conventions are used throughout this manual:

• Bulleted lists (like this one) provide information not procedural steps.

• Numbered lists provide sequential steps or hierarchical information.

• Italic type is used for emphasis.

• Text in this font indicates words or phrases you should type.

Rockwell Automation Support

Rockwell Automation offers support services worldwide, with over 75 Sales/Support Offices, 512 authorized distributors and 260 authorized Systems Integrators located throughout the United States alone, plus Rockwell Automation representatives in every major country in the world.

Local Product Support

Contact your local Rockwell Automation representative for:

• sales and order support

• product technical training

• warranty support

• support service agreement

Technical Product Assistance

If you need to contact Rockwell Automation for technical assistance, please review the information in Chapter 5, Module Diagnostics and Troubleshooting first. Then call your local Rockwell Automation representative.

Your Questions or Comments on the Manual

If you find a problem with this manual, please notify us. If you have any suggestions for how this manual could be made more useful to you, please contact us at the address below:

Rockwell Automation Automation Control and Information Group Technical Communication, Dept. A602V P.O. Box 2086 Milwaukee, WI 53201-2086

Publication 1769-UM002B-EN-P - July 2005

Notes:

Publication 1769-UM002B-EN-P - July 2005

Chapter

Overview

This chapter explains how analog data is used, and describes the 1769-IF4 and

-IF8 analog input modules and the 1769-OF2, -OF8C, and -OF8V analog output modules. Included is information about:

• the use of analog I/O

• the modules’ hardware and diagnostic features

• an overview of the 1769 analog input system operation

• an overview of the 1769 analog output system operation

How to Use Analog I/O

Analog refers to the representation of numerical quantities by the measurement of continuous physical variables. Analog applications are present in many forms. The following application shows a typical use of analog data.

In this application, the processor controls the amount of fluid in a holding tank by adjusting the valve opening. The valve is initially open 100%. As the fluid level in the tank approaches the preset point, the processor modifies the output to close the valve 90%, 80%, and so on, continuously adjusting the valve to maintain the fluid level.

Figure 1.1 Analog I/O Application Example

Analog output wired to valve

Valve

Controller

Level Sensor

Analog input wired

to tank

Analog I/O

Module

1 Publication 1769-UM002B-EN-P - July 2005

1-2 Overview

General Description

The 1769-IF4 and -IF8 analog input modules convert and digitally store analog data for retrieval by controllers, such as the CompactLogix™ or MicroLogix™

1500. The module supports connections from any combination of up to four voltage or current analog sensors for the 1769-IF4 and up to eight for the 1769-IF8. The high-impedance input channels can be wired as either single-ended or differential inputs.

The 1769-OF2 output module provides two single-ended analog output channels, each individually configurable for voltage or current. The 1769-OF8C and -OF8V output modules each provide eight single-ended analog output channels.

Both modules provide the following input/output types/ranges:

Table 1.1 Normal and Full Ranges

Normal Operating Input Range Full Module Range

±10V dc ± 10.5V dc

1 to 5V dc 0.5 - 5.25V dc

0 to 5V dc -0.5 - +5.25V dc

0 to 10V dc -0.5 - +10.5V dc

0 to 20 mA 0 - 21 mA

4 to 20 mA 3.2 - 21 mA

The data can be configured on board each module as:

• Engineering Units

• Scaled-for-PID

• Percent

• Raw/Proportional Data

Publication 1769-UM002B-EN-P - July 2005

Overview 1-3

Hardware Features

The modules contain removable terminal blocks. The 1769-IF4 and -IF8 channels can be wired as either single-ended or differential inputs. The 1769-OF2, -OF8C, and -OF8V channels are single-ended only. Module configuration is normally done via the controller’s programming software. In addition, some controllers support configuration via the user program. In either case, the module configuration is stored in the memory of the controller. Refer to your controller’s user manual for more information.

Figure 1.2 1769-OF2, -OF8C, -OF8V and -IF4 Analog Module’s Hardware Features

Analog

10a

10b

Analog

DANGER

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous

ANLG Com

I out 0 +

ANLG Com

I out 1 +

ANLG Com

I out 2 +

ANLG Com

I out 3 +

ANLG Com

I out 4 +

ANGL Com

I out 5 +

ANLG Com

I out 6 +

ANLG Com

I out 7 +

NEUT

+24V dc

Ensure Adjacent Bus Lever is Unlatched/Latched Before/After Removing/Inserting Module

1769-OF8C

Table 1.2 1769-OF2, -OF8C, -OF8V, and -IF4 Feature Descriptions

Item Description

1 bus lever (with locking function)

2a upper panel mounting tab

2b lower panel mounting tab

3 module status LEDs

4 module door with terminal identification label

5a movable bus connector with female pins

5b stationary bus connector with male pins

6 nameplate label

7a upper tongue-and-groove slots

7b lower tongue-and-groove slots

8a upper DIN rail latch

8b lower DIN rail latch

9 write-on label for user identification tags

10 removable terminal block (RTB) with finger-safe cover

10a RTB upper retaining screw

10b RTB lower retaining screw

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1-4 Overview

Figure 1.3 1769-IF8 Analog Module’s Hardware Features

IN 1

IN 3

IN 5

IN 7

IN 9

IN 11

IN 13

IN 15

DC COM

WARNING -Do Not Remove RTB Unless

Area is Non-Hazardous

IN 0

IN 2

IN 4

IN 6

DC COM

IN 8

IN 10

IN 12

IN 14

DC COM

1769-IQ32

IN 16

IN 17

IN 18

IN 19

IN 20

IN 21

IN 22

IN 23

DC COM

IN 25

IN 24

IN 27

IN 26

IN 29

IN 28

IN 31

IN 30

10a

10b

30538-M

Table 1.3 1769-IF8 Feature Descriptions

Item Description

1 bus lever (with locking function)

2a upper panel mounting tab

2b lower panel mounting tab

3 I/O diagnostic LEDs

4 module door with terminal identification label

5a movable bus connector with female pins

5b stationary bus connector with male pins

6 nameplate label

7a upper tongue-and-groove slots

7b lower tongue-and-groove slots

8a upper DIN rail latch

8b lower DIN rail latch

9 write-on label for user identification tags

10 removable terminal block (RTB) with finger-safe cover

10a RTB upper retaining screw

10b RTB lower retaining screw

Publication 1769-UM002B-EN-P - July 2005

Overview 1-5

General Diagnostic Features

The analog modules contain diagnostic features that can help you identify the source of problems that may occur during power-up or during normal channel operation. These power-up and channel diagnostics are explained in chapter 6,

Module Diagnostics and Troubleshooting.

System Overview

The modules communicate to the controller through the bus interface. The modules also receive 5 and 24V dc power through the bus interface. The 1769-IF4, -OF2, -OF8C, and -OF8V modules feature an external 24V dc power switch, providing you with the option of using an external power supply. See External Power Switch on page 2-10 for details.

You can install as many analog modules as your power supply can support. However, the modules have a power supply distance rating of 8, which means that they may not be located more than 8 modules away from the system power supply.

Figure 1.4 Determine Power Supply Distance

Adapter

Compact I/O

or I/O Communication

CompactLogix Controller

Compact I/O

System Power Supply

Compact I/O

1123432

End Cap

Compact I/O

Power Supply Distance

MicroLogix 1500 Controller

with Integrated System

Power Supply

Compact I/O

234

End Cap

Compact I/O

Power Supply Distance

Publication 1769-UM002B-EN-P - July 2005

1-6 Overview

System Operation

At power-up, the module performs a check of its internal circuits, memory, and basic functions. During this time, the module status LED remains off. If no faults are found during power-up diagnostics, the module status LED is turned on.

After power-up checks are complete, the module waits for valid channel configuration data. If an invalid configuration is detected, the module generates a configuration error. Once a channel is properly configured and enabled, it begins the analog-to-digital or digital-to-analog conversion process.

Input Modules

Each time a channel is read by the input modules, that analog data value is tested by the modules for an over-range or under-range condition. If such a condition is detected, a unique bit is set in the channel status word. The channel status word is described in 1769-IF4 Input Data File on page 3-2 and 1769-IF8 Input Data File on page 3-18.

The controller reads the two’s complement binary converted analog data from the modules. This typically occurs at the end of the program scan or when commanded by the control program. If the controller and the modules determine that the bus data transfer was made without error, the data is used in your control program.

Output Modules

The output modules monitor channels for over-range and under-range conditions and also for broken output wires and high load resistance (in current mode only). If such a condition is detected, a unique bit is set in the channel status word. The channel status word is described in 1769-OF2 Output Data File on page 4-2 and 1769-OF8C and -OF8V Output Data File on page 4-18.

The output module receives two’s complement binary values from the bus master. This typically occurs at the end of the program scan or when commanded by the control program. If the controller and the module determine that the bus transfer was completed without error, the output module converts the data to an analog output signal.

Publication 1769-UM002B-EN-P - July 2005

Input

Overview 1-7

Module Operation

Input Module Block Diagram

The input module’s input circuitry consists of four differential analog inputs multiplexed into a single analog-to-digital (A/D) converter. The A/D converter reads the selected input signal and converts it to a digital value which is presented to the controller. The multiplexer sequentially switches each input channel to the module’s A/D converter.

Figure 1.5 1769-IF4 Block Diagram

Galvanic

VA2

VA1 VS1

Isolation

CH0

Vin+

Iin+

V/Iin-

COM

A-GND

CH1

CH2

CH3

dc Neutral

+24V dc

Multiplexer

(same as above)

Vref VREF

Channel Select

AIN+

A/D

AIN-

VA3

TXD

MCU ASIC

RXD

DC/DC Power

VA1

VA2

VA3

Supply

A-GND S-GND

Bus

VS1

VS2

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1-8 Overview

Figure 1.6 1769-IF8 Block Diagram

CH0

CH1

CH2

CH3

CH4

CH5

CH6

CH7

Vin + Iin + V/ICom Vin + Iin + V/ICom

Select

High Impedance

Gain

Vref

Gain

Converter

EN0

EN1

CPU

Opto

Coupler

Opto

Coupler

Opto

Coupler

+15V

+5V

-15V

GND

ASIC

DC/DC

converter

LED

CN2

(Out)

+24V

GND

31542-M

CN1

(In)

Publication 1769-UM002B-EN-P - July 2005

Output

Overview 1-9

Output Module Block Diagram

The output module uses a digital-to-analog (D/A) converter to read the digital output data from the controller and convert it to an analog output signal.

Figure 1.7 1769-OF2 Block Diagram

Galvanic Isolation

VA2

VA1

VS1

CH0

Iout+

Vout+

COM

dc Neutral

+24V dc

A-GND

TXD

RXD

Power Supply

VA1

DC/DC

ASIC

VS1

VS2

A-GND

VA2

VA3

CH1

Analog Switch

Selec

Iout

D/A

Iout

Refout

Latch

Selec

MCU

VA2

(same as above)

VA3

A-GND S-GND

Figure 1.8 1769-OF8C and -OF8V Block Diagram

The following diagram shows only one of eight outputs. For each analog output, only one of the sections shown in broken-line boxes is implemented. The 1769-OF8C module uses only the Current Out section while the 1769-OF8V module uses only the Voltage Out section.

Bus

16 pin backplane connector

ASIC

+24 VDC

GND

Curent Out

Detect

CFU

64K Flash/

2K RAM

OPTOS

500VDC Isoleted

Power Supply

+5V

+15V -15V

GND

16 Bit

DAC

Voltage Out

ESD Limit

18 pin Terminal Block

EXT 24VDC

GND

Publication 1769-UM002B-EN-P - July 2005

1-10 Overview

Module Field Calibration

The 1769-IF4 and -IF8 input modules performs autocalibration when a channel is initially enabled. In addition, if a channel is configured differently than the previously scanned channel, an autocalibration cycle is run as part of the reconfiguration process.

The 1769-OF2, -OF8C, and -OF8V output modules’s calibration is guaranteed by its design. No field calibration is required.

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring

This chapter tells you how to:

• determine the power requirements for the modules

• avoid electrostatic damage

• install the module

• wire the module’s terminal block

• wire input devices

• wire output devices

Chapter

Compliance to European Union Directives

This product is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.

EMC Directive

The analog modules are tested to meet Council Directive 89/336/EEC Electromagnetic Compatibility (EMC) and the following standards, in whole or in part, documented in a technical construction file:

• EN 50081-2

EMC – Generic Emission Standard, Part 2 - Industrial Environment

• EN 50082-2

EMC – Generic Immunity Standard, Part 2 - Industrial Environment

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 73/23/EEC Low Voltage, by applying the safety requirements of EN 61131-2 Programmable Controllers, Part 2 – Equipment Requirements and Tests.

For specific information required by EN61131-2, 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

• Automation Systems Catalog, publication B113

1 Publication 1769-UM002B-EN-P - July 2005

2-2 Installation and Wiring

Power Requirements

General Considerations

The modules receive power through the bus interface from the +5V dc/+24V dc system power supply. Some modules can also be supplied 24V dc power by an external power supply connected to the module’s terminal block.

Table 2.1 Maximum Current Draw

Module 5V dc 24V dc

1769-IF4 (Series A)

1769-IF4 (Series B)

120 mA

Not applicable

(1)

60 mA

1769-IF8 (Series A) 70 mA

1769-OF2 (Series A) 120 mA Not applicable

1769-OF2 (Series B)

1769-OF8C (Series A)

145 mA

1769-OF8V (Series A)

(1)

If the optional 24V dc Class 2 power supply is used, the 24V dc current draw from the bus is 0 mA.

120 mA

160 mA

125 mA

(1)

Compact I/O is suitable for use in an industrial environment when installed in accordance with these instructions. Specifically, this equipment is intended for

(1)

use in clean, dry environments (Pollution degree 2

exceeding Over Voltage Category II

(2)

(IEC 60664-1).

) and to circuits not

(3)

Publication 1769-UM002B-EN-P - July 2005

(1)

Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation shall be expected.

(2)

Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.

(3)

Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.

Installation and Wiring 2-3

Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only. The following WARNING statement applies to use in hazardous locations.

ATTENTION

EXPLOSION HAZARD

• Substitution of components may impair suitability for

Class I, Division 2.

• Do not replace components or disconnect equipment

unless power has been switched off or the area is known to be non-hazardous.

• Do not connect or disconnect components unless

power has been switched off or the area is known to be non-hazardous.

• This product must be installed in an enclosure.

• All wiring must comply with N.E.C. article 501-4(b).

Prevent Electrostatic Discharge

ATTENTION

Electrostatic discharge can damage integrated circuits or semiconductors if you touch analog I/O module bus connector pins or the terminal block on the input module. Follow these guidelines when you handle the module:

• Touch a grounded object to discharge static potential.

• Wear an approved wrist-strap grounding device.

• Do not touch the bus connector or connector pins.

• Do not touch circuit components inside the module.

• If available, use a static-safe work station.

• When it is not in use, keep the module in its

static-shield box.

Publication 1769-UM002B-EN-P - July 2005

2-4 Installation and Wiring

Remove Power

ATTENTION

Remove power before removing or inserting this module. When you remove or insert a module with 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

• Electrical arcing causes excessive wear to contacts on

both the module and its mating connector and may lead to premature failure.

Reducing Noise

Most applications require installation in an industrial enclosure to reduce the effects of electrical interference. Analog inputs and outputs are highly susceptible to electrical noise. Electrical noise coupled to the analog inputs will reduce the performance (accuracy) of the module.

Group your modules to minimize adverse effects from radiated electrical noise and heat. Consider the following conditions when selecting a location for the analog module. Position the module:

System Assembly

• away from sources of electrical noise such as hard-contact switches,

relays, and AC motor drives

• away from modules which generate significant radiated heat, such as the

1769-IA16. Refer to the module’s heat dissipation specification.

In addition, route shielded, twisted-pair analog input and output wiring away from any high voltage I/O wiring.

Protecting the Circuit Board from Contamination

The printed circuit boards of the analog modules must be protected from dirt, oil, moisture, and other airborne contaminants. To protect these boards, the system must be installed in an enclosure suitable for the environment. The interior of the enclosure should be kept clean and the enclosure door should be kept closed whenever possible.

The module can be attached to the controller or an adjacent I/O module before or after mounting. For mounting instructions, see Panel Mounting Using the Dimensional Template on page 2-7, or DIN Rail Mounting on page 2-8. To

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-5

work with a system that is already mounted, see Replacing a Single Module within a System on page 2-9.

Figure 2.1 Assemble the Compact I/O System

1. Disconnect power.

2. Check that the bus lever of the module to be installed is in the unlocked

(fully right) position.

3. Use the upper and lower tongue-and-groove slots (1) to secure the modules together (or to a controller).

4. Move the module back along the tongue-and-groove slots until the bus connectors (2) line up with each other.

5. Push the bus lever back slightly to clear the positioning tab (3). Use your fingers or a small screwdriver.

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2-6 Installation and Wiring

6. To allow communication between the controller and module, move the bus lever fully to the left (4) until it clicks. Ensure it is locked firmly in place.

Mounting

ATTENTION

When attaching I/O modules, it is very important that the bus connectors are securely locked together to ensure proper electrical connection.

7. Attach an end cap terminator (5) to the last module in the system by using the tongue-and-groove slots as before.

8. Lock the end cap bus terminator (6).

IMPORTANT

A 1769-ECR or 1769-ECL right or left end cap must be used to terminate the end of the bus.

ATTENTION

During panel or DIN rail mounting of all devices, be sure that all debris (metal chips, wire strands, etc.) is kept from falling into the module. Debris that falls into the module could cause damage at power up.

Publication 1769-UM002B-EN-P - July 2005

Minimum Spacing

Maintain spacing from enclosure walls, wireways, adjacent equipment, etc. Allow 50 mm (2 in.) of space on all sides for adequate ventilation.

Figure 2.2 Space Requirements

Top

Side Side

Host Controller

Compact I/O

Bottom

Compact I/O

End Cap

Compact I/O

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