1756-IRT8I | Allen-Bradley ControlLogix Isolated Analog I/O Module

Overview

The Allen-Bradley 1756-IRT8I is an 8-channel ControlLogix isolated analog input module optimized for precise temperature and millivolt (mV) measurements. Designed for thermocouple applications, it offers high-resolution signal acquisition and maintains full electrical isolation between input channels and the backplane.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model / Part Number: 1756-IRT8I

• Product Type: ControlLogix Isolated Analog I/O Module

• Channels: 8 isolated inputs

• Input Mode: Thermocouple

• Input Voltage Range: -100 to 100 mV

• Actual Input Range Capability: -101 to 101 mV

• Resolution: 24-bit theoretical, 23.98-bit effective across full range

• Removable Terminal Block: 36-pin (compatible with 1756-TBCH or 1756-TBS6H)

• Isolation: Each input channel is individually isolated to prevent interference

• Module Mounting: Standard ControlLogix chassis slot

Key Features

• High-accuracy 8-channel analog input for thermocouples

• Individually isolated channels improve system safety and signal integrity

• Compatible with standard ControlLogix terminal blocks for easy installation

• Supports millivolt-range signals for precise process monitoring

• Ideal for temperature and low-voltage sensor integration

Applications

• Industrial process temperature measurement and monitoring

• Integration with ControlLogix systems requiring isolated analog inputs

• High-precision signal acquisition for research or manufacturing processes

FAQs

Q1: What type of signals does the 1756-IRT8I accept?
It supports thermocouple temperature signals and low-voltage millivolt inputs.

Q2: How many inputs are isolated?
All 8 channels are individually isolated for improved safety and reduced cross-talk.

Q3: Which terminal blocks are compatible?
It is compatible with 36-pin 1756-TBCH or 1756-TBS6H removable terminal blocks.