Allen-Bradley 1756-IT6I2 ControlLogix Isolated Thermocouple Input Module

Product Overview

The Allen-Bradley 1756-IT6I2 operates as a high-precision, channel-to-channel isolated analog thermocouple input module within the ControlLogix platform. This chassis-based module converts micro-volt signals from temperature sensors directly into digital values for the central processor. It monitors critical thermal processes across six independent input channels while utilizing two Cold Junction Compensation (CJC) sensors to maintain absolute measurement accuracy during ambient temperature shifts.

Technical Specifications

Engineering Advantages

• Eliminates Ground Loop Interference: Complete channel-to-channel electrical isolation prevents ground loops from corrupting weak millivolt sensor signals. This protection allows engineers to wire ungrounded or grounded thermocouples safely in environments with high electrical noise.

• Delivers Sub-Microvolt Sensitivity: The 16-bit analog-to-digital converter tracks shifts as small as $0.7\ \mu\text{V}$ per bit when operating within the high-resolution input range (-12 to 30 mV). This sensitivity translates into precise thermal data for tight closed-loop process control.

• Auto-Corrects Ambient Thermal Drift: Dual integrated Cold Junction Compensation (CJC) channels continuously measure terminal block temperatures. The module uses this data to adjust sensor scaling automatically, canceling out localized ambient panel heating errors.

• Minimizes System Energy Footprint: The optimized internal board limits maximum power dissipation to 4.6 Watts. This efficient thermal profile keeps the ControlLogix rack cool, extending the service life of adjacent communication and processing modules.

FAQs

• Does this module ship in original, untampered factory packaging?

  Yes. We supply the 1788-CN2FFR... excuse me, the 1756-IT6I2 exclusively in 100% brand new, original factory condition. The item retains its genuine Rockwell Automation box, complete factory seals, and original UPC barcode (612598299683).

• Which specific removable terminal blocks fit the front of this analog card?

  This module requires either the 1756-TBNH NEMA screw-clamp terminal block or the 1756-TBSH spring-clamp terminal block. Always install the CJC thermistors included with the terminal block to enable cold junction compensation functionality.

• Can this single module handle different types of thermocouples simultaneously?

  Yes. You can configure each of the 6 isolated channels independently via Studio 5000 software. For example, channel 0 can read a Type K thermocouple on a high-temperature kiln while channel 1 tracks a Type J sensor on a nearby bearing housing.