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Allen-Bradley 1756

Allen-Bradley 1756
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Migrating 6-channel to 8-channel 1756 Analog Modules
Catalog Numbers 1756-IF6CIS, 1756-IF6I, 1756-IF8I, 1756-IR6I, 1756-IRT8I, 1756-IT6I, 1756-IT6I2, 1756-OF6CI, 1756-OF6VI,
1756-OF8I
Reference Manual
Original Instructions

Table of Contents

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Allen-Bradley 1756 Specifications

General IconGeneral
BrandAllen-Bradley
Model1756
CategoryControl Unit
LanguageEnglish

Summary

Preface

Manual Overview

Describes how to migrate from 6-channel to 8-channel analog I/O modules.

Migration Services and Support

Rockwell Automation's role in supporting product lifecycle and technology transitions.

Integrated Architecture Tools

Tools for planning and configuring systems and migrating architectures.

Additional Resources

Lists related documents and resources from Rockwell Automation.

Chapter 1 Replacement Considerations

6- and 8-Channel Analog Modules

Lists the 6-channel and 8-channel analog I/O modules covered in the manual.

Product Comparison: 6- vs. 8-Channel Modules

Compares 8-channel replacement products with their 6-channel original counterparts.

Wiring for Module Replacement

Discusses physical system changes and RTB wiring for module replacement.

Chapter 2 Emulation Mode

Emulation Mode Functionality

Explains how 8-channel modules emulate 6-channel functionality with specific firmware.

Emulation Mode Differences: Input and Output Ranges

Details differences in input/output ranges when emulating 6-channel modules.

Input Range Emulation Differences

Lists input range differences between 6-channel and 8-channel modules in emulation.

Output Range Emulation Differences

Lists output range differences between 6-channel and 8-channel modules in emulation.

Chapter 3 Hardware Specifications and Considerations

Backplane Power Requirements

Discusses backplane power consumption differences between 6-channel and 8-channel modules.

Module Current Draw Analysis

Details backplane current draw at 5.1V and 24V for 8-channel modules compared to 6-channel.

Module Calibration Procedures

Explains calibration procedures and potential errors when using 6-channel profiles for 8-channel modules.

RPI and RTS Values for Emulation

Compares RPI/RTS sampling behavior between 6-channel and 8-channel modules in emulation.

Cold Junction Compensation for Thermocouple Modules

Information on cold junction compensation sensors for thermocouple modules.

External Loop Supply with 1756-IF6 CIS

Guidance on using external loop supply with the 1756-IF6CIS module.

Chapter 4 Application Conversion

Firmware Update Procedures

Procedures for upgrading/downgrading firmware on 8-channel modules.

Communication Format Support

Discusses communication format compatibility and emulation mode limitations.

Electronic Keying Options

Recommendations and warnings regarding electronic keying options for emulation.

Time Stamp Data Handling

Explains time stamp behavior differences between 6-channel and 8-channel modules.

CIP Generic Message Compatibility

Discusses compatibility and behavior of CIP generic messages with 8-channel modules in emulation.

1756-IF8 I Communication Formats

Shows communication formats supported by 1756-IF8I for 6-channel modules.

1756-IRT8 I Communication Formats

Shows communication formats supported by 1756-IRT8I for 6-channel modules.

1756-OF8 I Communication Formats

Shows communication formats supported by 1756-OF8I for 6-channel modules.

Configuration in Emulation Mode

How 8-channel modules accept 6-channel style configuration in emulation.

Tag Structures in Emulation

States that tag structures remain intact in 6-channel format during emulation.

RSLogix 5000 Version Support

Details RSLogix 5000 version support for 8-channel modules in emulation.

RSLinx EDS Updates

How to remove yellow question marks in RSLinx by installing EDS files.

Module Information Tab Details

Explains module identity reporting and potential mismatches in emulation mode.

Chapter 5 Diagnostics

Module Status Indicators

Overview of status and fault indicators on 8-channel modules.

1756-IF8 I Module Status Indicators

Details the status and fault indicators for the 1756-IF8I module.

1756-IRT8 I Module Status Indicators

Details the status and fault indicators for the 1756-IRT8I module.

1756-OF8 I Module Status Indicators

Details the status and fault indicators for the 1756-OF8I module.

Appendix A RTB Wiring

RTB Wiring: 1756-IF6 I to 1756-IF8 I Voltage Mode

Wiring diagram for migrating 1756-IF6I to 1756-IF8I in Voltage Mode.

RTB Wiring: 1756-IF6 I to 1756-IF8 I Current Mode

Wiring diagram for migrating 1756-IF6I to 1756-IF8I in Current Mode.

RTB Wiring: 1756-IF6 CIS Loop Power

Wiring for 1756-IF6CIS providing loop power to 1756-IF8I.

RTB Wiring: 1756-IF6 CIS User Loop Power

Wiring for 1756-IF6CIS with user-supplied loop power to 1756-IF8I.

RTB Wiring: 1756-IR6 I to 1756-IRT8 I 3-Wire RTD

Wiring diagram for migrating 1756-IR6I to 1756-IRT8I in 3-Wire RTD mode.

RTB Wiring: 1756-IR6 I to 1756-IRT8 I 4-Wire RTD

Wiring diagram for migrating 1756-IR6I to 1756-IRT8I in 4-Wire RTD mode.

RTB Wiring: 1756-IT6 I to 1756-IRT8 I TC or mV

Wiring diagram for migrating 1756-IT6I to 1756-IRT8I for TC or mV inputs.

RTB Wiring: 1756-IT6 I2 to 1756-IRT8 I TC or mV

Wiring diagram for migrating 1756-IT6I2 to 1756-IRT8I for TC or mV inputs.

RTB Wiring: 1756-OF6 VI to 1756-OF8 I Voltage Mode

Wiring diagram for migrating 1756-OF6VI to 1756-OF8I in Voltage Mode.

RTB Wiring: 1756-OF6 CI to 1756-OF8 I Current Mode

Wiring diagram for migrating 1756-OF6CI to 1756-OF8I in Current Mode.

Rockwell Automation Support

Rockwell Automation Technical Support Center

Access to knowledgebase, videos, FAQs, chat, forums, and notifications.

Local Technical Support Phone Numbers

Locates country-specific technical support phone numbers.

Direct Dial Codes for Support

Finds direct dial codes for routing calls to technical support.

Rockwell Automation Literature Library

Access to installation instructions, manuals, brochures, and technical data.

Product Compatibility and Download Center

Determines product interactions, features, capabilities, and firmware.

Documentation Feedback Submission

Provides a form to submit feedback for documentation improvement.

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