A-B 1756-IT6I2 Thermocouple Input Module

Allen-Bradley 1756-IT6I2 Thermocouple Input Module (ControlLogix)

 

 

The Allen-Bradley 1756-IT6I2 is a 6-channel enhanced isolated thermocouple/millivolt input module for the ControlLogix 1756 PLC platform. It is designed to measure temperature from thermocouples or low-level millivolt signals and transmit high-accuracy data to the PLC for monitoring and process control. The module also includes 2 Cold Junction Compensation (CJC) inputs to improve measurement accuracy.

Key Specifications

• Model: 1756-IT6I2
• Brand: Allen-Bradley (Rockwell Automation)
• Series: ControlLogix 1756
• Product Type: Thermocouple / Millivolt Analog Input Module
• Input Channels:
  • 6 individually isolated thermocouple inputs
  • 2 CJC (Cold Junction Compensation) inputs
• Supported Thermocouple Types:
  • B, C, D, E, J, K, L, N, R, S, T
• Input Ranges:
  • −12 to +30 mV
  • −12 to +78 mV
• Resolution: 16-bit
• Isolation: 250 V continuous (channel-to-channel and channel-to-backplane)
• Compatible Terminal Block: 1756-TBNH
• Installation: Any ControlLogix 1756 chassis

What it does (Simple Explanation)

Thermocouple Sensor
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1756-IT6I2 Input Module
↓
ControlLogix PLC
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HMI / SCADA / Temperature Control

The module converts temperature signals from thermocouples into digital values that the PLC can use for monitoring, alarming, and process control.

Main Functions

• Measures temperature from thermocouple sensors
• Accepts millivolt input signals
• Performs automatic cold junction compensation (CJC)
• Detects open thermocouple circuits
• Sends accurate temperature data to the PLC
• Supports industrial process monitoring and control

Key Features

• 6 individually isolated thermocouple input channels
• Supports multiple thermocouple types
• High-accuracy 16-bit conversion
• Built-in cold junction compensation
• Open-wire detection and diagnostics
• Excellent noise immunity for industrial environments
• Compatible with integer or floating-point data formats

Applications

• Industrial furnace temperature monitoring
• Heat treatment equipment
• Boilers and steam systems
• Chemical processing
• Food and beverage production
• Power generation
• Oil & gas process control