Allen-Bradley 1756-CJC | Cold Junction Compensation Thermistors

Overview

The 1756-CJC from Allen-Bradley is a Cold Junction Compensation (CJC) Thermistor designed for precise thermocouple temperature measurement. It works with 1756-IRT8I and 1756-IT16 thermocouple input modules.

Technical Specifications

This thermistor operates over a temperature range of -40°C to 125°C (-40°F to 257°F) with an accuracy of ±0.5°C (1°F). The response time is 10 seconds, allowing rapid adaptation to temperature changes. Its compact dimensions are 19mm x 19mm x 19mm (0.75 in. x 0.75 in. x 0.75 in.), and the weight is 10 g (0.35 oz), supporting flexible mounting options.

Installation and Compatibility

The 1756-CJC mounts via a Removable Terminal Block (RTB) or 1492 interface module (IFM), ensuring easy installation. It integrates seamlessly with Allen-Bradley ControlLogix controllers and I/O modules, providing accurate reference junction temperature measurements.

Performance and Benefits

Using the 1756-CJC improves thermocouple accuracy by compensating for reference junction temperature variations. Its durable design ensures consistent performance in industrial environments. The thermistor is CE, UL, and CSA certified, guaranteeing compliance with safety and quality standards.

Physical and Operational Details

The thermistor kit weighs 0.25 kg (0.55 lbs) and originates from the United States, offering reliable industrial-grade construction. It is backed by a 1-year warranty, making it suitable for long-term deployment in critical automation applications.