Allen-Bradley 1756-IF8I User Manual

High Resolution Analog I/O Modules
Catalog Numbers 1756-IF8I, 1756-IRT8I, 1756-OF8I, 1756-IR12, 1756-IT16
User Manual
Original Instructions

Allen-Bradley 1756-IF8I Specifications

General

Category	I/O Systems
Manufacturer	Allen-Bradley
Module Type	Analog Input Module
Number of Inputs	8
Resolution	16 bits
Backplane Current @ 24VDC	30 mA
Power Dissipation	1.2 W
Voltage Input Range	0 to 10V, -10 to 10V
Current Input Range	0-20mA, 4-20mA
Module Location	Any slot in the chassis
Operating Temperature	0 to 60 °C

Summary

Important User Information

Analog I/O Module Operation in the ControlLogix System

Before You Begin

Tasks to complete before installing and using the analog I/O modules.

Ownership

Explains controller ownership of I/O modules and communication requirements.

Configure a Module

Details on configuring I/O modules using Studio 5000 Logix Designer application.

Direct Connections

Real-time data transfer link between controller and device.

1756-IF8I Isolated Analog Input Module

1756-IF8I Module Features

Lists key features of the 1756-IF8I module, including filters, alarms, and sampling.

Process Alarms

Alerts when module exceeds configured high or low limits for each channel.

Fault and Status Reporting

Provides fault and status data via module tags for monitoring operation.

Temperature-sensing Analog Modules

Common Module Features

Lists features common to temperature-sensing modules like input ranges, filters, and alarms.

Cold Junction Compensation

Accounts for thermoelectric effect at thermocouple junction for accurate temperature measurement.

Fault and Status Reporting

Provides fault and status data via module tags for monitoring operation.

1756-OF8I Isolated Analog Output Module

1756-OF8I Module Features

Lists key features like output ranges, offset, ramping, clamping, and data echo.

Clamping/Limiting

Limits output to a configured range even if controller commands outside that range.

Redundant Owners

Explains redundant ownership for single output or coordinated control by two controllers.

Install ControlLogix Analog I/O Modules

Install the I/O Module

Procedures for installing an I/O module into the chassis while maintaining power.

Key the Removable Terminal Block

Process to prevent inadvertently connecting the wrong wiring by keying the RTB and module.

Connect Wiring

Instructions for connecting wires to the module using an RTB or pre-wired AIFM.

Configure ControlLogix Analog I/O Modules

Create a New Module

Steps to create a new module within a Logix Designer application project.

Edit the Configuration

Using tabs in the New Module dialog box to edit module configuration parameters.

Calibrate the ControlLogix Analog I/O Modules

Calibrate the Input Modules

Details the multi-step process for calibrating input modules using signal references.

Calibrate the Temperature-sensing Modules

Calibrating temperature-sensing modules (IRT8I, IR12, IT16) for RTD and Thermocouple input types.

Calibrate the Output Module

Calibrating the 1756-OF8I module for Current (mA) and Voltage (V) output types.

Troubleshoot Your Module

Status Indicators for the 1756-IF8I Module

Explains the meaning of status indicators on the 1756-IF8I module for monitoring operation.

Use Logix Designer Application for Troubleshooting

How Logix Designer indicates fault conditions and where to find fault information.

Troubleshoot Incorrect Readings on the Module

Steps to troubleshoot incorrect temperature, current, or voltage readings on analog I/O modules.

Analog I/O Module Tag Definitions

Access the Tags

Steps to view module tags from the Tag Editor in Logix Designer.

1756-IF8I Module Tags

Detailed description of configuration, input, and output tags for the 1756-IF8I module.

1756-IRT8I Module Tags

Detailed description of configuration and input tags for the 1756-IRT8I module.