Allen-Bradley 1756-IT16 - 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-IT16 Specifications

General

Manufacturer	Allen-Bradley
Product Type	Analog Input Module
Series	ControlLogix
Input Channels	16
Number of Inputs	16
Power Dissipation	2.5 W
Backplane Current @ 5VDC	0.5 A
Operating Temperature	0 to 60 °C
Storage Temperature	-40°C to 85°C
Relative Humidity	5 to 95% (non-condensing)
Module Location	ControlLogix Chassis
Weight	0.5kg
Resolution	16 bits
Isolation Voltage	250V (Continuous), 1500V AC (Test Voltage)

Summary

Important User Information

Chapter 1: 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

Configure a Module

Outlines the process of configuring an I/O module using the Logix Designer application.

Input Module Operation

Details how analog input modules broadcast data to the backplane independently of polling.

Output Module Operation

Explains how controllers send data to output modules and the role of the RPI in timing.

Chapter 2: Analog I;O Module Features

Scaling

Calibration

Details factory and optional user-executed calibration methods for ensuring module accuracy.

Chapter 3: 1756-IF8 I Isolated Analog Input Module

1756-IF8 I Module Features

Lists key features including Internal Loop Power, Multiple Input Ranges, Notch Filter, and Digital Filter.

Chapter 4: Temperature-sensing Analog Modules

Underrange;Overrange Detection

Process Alarms

Wire Off Detection

Cold Junction Compensation

Accounts for thermoelectric effect at junctions to accurately measure thermocouple temperatures.

Chapter 5: 1756-OF8 I Isolated Analog Output Module

1756-OF8 I Module Features

Lists key features including Multiple Output Ranges, Channel Offset, Ramping, and Clamping.

Ramping;Rate Limiting

Clamping;Limiting

Redundant Owners

Configure the Output Module

Steps to configure output modules for redundant owner applications using Logix Designer.

Chapter 6: Install ControlLogix Analog I;O Modules

Environment and Enclosure

Install the I;O Module

Details the procedure for installing an I/O module into the chassis, including RIUP capabilities.

Key the Removable Terminal Block

Explains how to key the RTB to prevent incorrect wiring connections to the module.

Connect Wiring

Describes how to wire the module using an RTB or a pre-wired Analog Interface Module (AIFM).

Assemble the RTB and the Housing

Install the Removable Terminal Block

Guides on aligning and seating the RTB onto the module for making wiring connections.

Chapter 7: Configure ControlLogix Analog I;O Modules

Create a New Module

Steps to add and define a new analog I/O module within a Logix Designer project environment.

Edit the Configuration

Explains how to modify module configuration settings using various tabs in the New Module dialog.

Connection Tab

Configuration Tab

Calibration Tab

Alarm Configuration Tab

Limit Configuration Tab

Chapter 8: Calibrate the ControlLogix Analog I;O Modules

Calibrate the Input Modules

Details the multi-step process of input calibration using low and high signal references applied to the module.

Calibrate the Temperature-sensing Modules

Covers calibration procedures for RTD and Thermocouple inputs on specific temperature-sensing modules.

Calibrate the Output Module

Explains the calibration process for output modules, focusing on current and voltage output types.

Chapter 9: Troubleshoot Your Module

Status Indicators

Use Logix Designer Application for Troubleshooting

Describes how Logix Designer indicates faults via warning signals and status line messages for troubleshooting.

Fault Type Determination

Troubleshoot Incorrect Readings on the Module

Provides general steps to diagnose and resolve incorrect temperature, current, or voltage readings.