Allen Bradley 1756-IRT8I ControlLogix RTD/Thermocouple Input Module

Overview

The Allen Bradley 1756-IRT8I is a ControlLogix RTD and thermocouple input module designed for high-accuracy temperature measurement in industrial automation systems. It supports multiple temperature sensor types and delivers stable signal conversion with strong electrical isolation. The module is suitable for process control applications where precise thermal monitoring and reliable signal integrity are required.

General Information

Part Number: 1756-IRT8I

Manufacturer: Allen Bradley

Brand: Allen-Bradley

Country of Origin: United States

Series: ControlLogix

Type: RTD / Thermocouple Input Module

Module Category: Analog Input Module (Temperature)

Number of Channels: 8 Inputs

Supported Sensor Types: RTD (Pt100, Pt1000) and Thermocouple (various types)

Mounting: ControlLogix Chassis Installation

Terminal Block Compatibility: 1756-TBCH, 1756-TBS6H

Power Specifications

Input Type: RTD / Thermocouple Signal

Backplane Current Draw (5.1 V DC): Approx. 400 mA

Backplane Current Draw (24 V DC): Approx. 2 mA

Power Dissipation: Approx. 6 W

Isolation Voltage: 250 V Continuous

Power Source: ControlLogix Backplane

Status Indicators: Channel Status and Module Health LEDs

Communication & Interface

Input Channels: 8

Channel Isolation: Individually Isolated Inputs

Connection Method: Removable Terminal Block

Data Interface: ControlLogix Backplane Communication

Diagnostics: Open-circuit, short-circuit, and over-range detection

System Compatibility: ControlLogix Controllers and I/O Chassis

Signal Processing: High-precision temperature conversion with digital filtering and linearization

Environmental

Operating Temperature: 0°C to +60°C

Storage Temperature: -40°C to +85°C

Relative Humidity: 5% to 95% RH, Non-Condensing

Shock Resistance: Industrial Grade

Vibration Resistance: Suitable for Industrial Environments

Protection Rating: Open-Type Equipment for Enclosed Cabinets

Dimensions & Weight

Dimensions (H × W × D): 144.57 × 22 × 105.42 mm

Weight: 0.45 kg

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