Allen-Bradley 1756-IT6I 6-Channel Isolated TC Analog Input Module

Overview

The Allen-Bradley 1756-IT6I is a ControlLogix analog thermocouple input module featuring six isolated channels. It provides high-accuracy temperature measurement and flexible integration for industrial automation applications, supporting a wide range of thermocouple types.

Technical Specifications

• Manufacturer: Allen-Bradley

• Product Line: ControlLogix

• Model / Part Number: 1756-IT6I

• Product Type: 6-Point Isolated Thermocouple Input Module

• Module Type: Analog Thermocouple Module (Isolated)

• Number of Inputs: 6 isolated thermocouple channels + 1 CJC channel

• Supported Thermocouples: B, C, E, J, K, N, R, S, T

• Input Range: -12…78 mV (typical), -12…30 mV (high-resolution range)

• Resolution: 16 bits, 0.7–1.4 µV/bit depending on input range

• Data Format: Integer mode (left justified, 2’s complement), IEEE 32-bit floating point

• Module Scan Time: 25 ms min floating point (millivolt), 50 ms min floating point (temperature), 10 ms min integer (millivolt)

• Backplane Current: 5V DC: 250 mA, 24V DC: 125 mA

• Power Dissipation: 4.3 W max

• Removable Terminal Blocks: 1756-TBNH, 1756-TBSH

• Enclosure Type: Open

• Weight: 1.38 lbs (0.62 kg)

Key Features

• Fully isolated inputs for accurate thermocouple measurement without cross-channel interference

• Supports multiple thermocouple types for versatile process monitoring

• High-resolution input for precision signal conversion

• Compatible with ControlLogix chassis and removable terminal blocks for easy installation

• Low power consumption and minimal heat generation

Application Scenarios

• Industrial temperature monitoring and process automation requiring isolated thermocouple inputs

• Integration with ControlLogix PLCs for precision process control

• Multi-channel temperature acquisition for SCADA or HMI systems

• Replacement or upgrade for existing 6-point TC modules in ControlLogix racks

FAQs

Q: How many thermocouple channels are isolated?
A: All six input channels are fully isolated for accurate measurements.

Q: Which thermocouple types are supported?
A: B, C, E, J, K, N, R, S, and T thermocouples are compatible.

Q: What is the module scan time?
A: Scan times range from 10 ms (integer millivolt) to 50 ms (floating point temperature) depending on configuration.