1756-IRT8IK Allen-Bradley ControlLogix Temperature Module

Allen-Bradley 1756-IRT8IK ControlLogix Temperature Input Module

The Allen-Bradley 1756-IRT8IK by Rockwell Automation is a high-precision, isolated 8-channel analog input module engineered for advanced temperature measurement within the ControlLogix system. Featuring an extra conformal coating layer indicated by the "K" suffix for superior protection against harsh environments, this 24-bit high-resolution card carries an average physical weight of 0.62 pounds (0.28 kg). It fits seamlessly into a single chassis slot and supports a flexible mix of RTD, thermocouple, and millivolt signals, ensuring exceptionally fast and reliable tracking data for chemical reactors, HVAC loops, and food production thermal logs.

Key Advantages

Built with a flexible 8-channel input matrix, this module allows engineers to mix RTDs, thermocouples, or low-level millivolt signals seamlessly across isolated ports without dedicating multiple slots to single sensor styles. It achieves remarkable reading accuracy through embedded dual Cold Junction Compensation (CJC) sensors that preserve a tight ±0.3°C tolerance baseline alongside an automatic lead resistance self-calibration engine. Furthermore, despite its lightweight construction, the unit increases localized process safety with integrated operational diagnostic networks, offering rapid wire-off fault discovery, customizable process alarms, and digital notch filters designed to filter out industrial backplane electrical hums.

Technical Specifications

Quick Installation

• Chassis Placement: Align the module card with the top and bottom chassis runners inside your Allen-Bradley ControlLogix rack, sliding it firmly until the levers lock. The compact 0.28 kg form factor ensures effortless insertion without strain on the backplane connectors.
• Terminal Interfacing: Wire up the field loops directly onto the appropriate pins of your 36-pin Removable Terminal Block (RTB) housing prior to snapping the component into place over the front module pins.
• Configuration Verification: Map the synchronized sample settings inside your RSLogix 5000 or Studio 5000 development window, ensuring baseline notch filtering parameters match local line distribution frequencies.

Technical FAQs

Q1: What does the specific "K" suffix represent on the Allen-Bradley 1756-IRT8IK hardware badge?
A1: The "K" suffix denotes that the circuit boards receive a specialized conformal coating overlay, protecting core silicon parts against ambient humidity, salt spray, and airborne chemical pollution.

Q2: Does the physical weight of this module include the required 36-pin Removable Terminal Block assembly?
A2: No, the net weight of approximately 0.62 lbs (0.28 kg) covers the standalone 1756-IRT8IK module itself. Adding a fully wired 1756-TBCH or 1756-TBS6H terminal block will slightly increase the overall weight when mounted in the chassis.

Q3: Can I combine thermocouple elements alongside standard RTDs on the same module block?
A3: Yes, the 1756-IRT8IK features independent configuration profiles for each of its 8 channels, enabling separate sensor assignments to meet complex processing demands.