Allen-Bradley 1746-BTM | SLC 500 Temperature Control Module

Product Overview

The Allen-Bradley 1746-BTM is a Barrel Temperature Control Module engineered for the SLC 500 platform. It provides four thermocouple analog inputs, each serving as a controlled variable in a dedicated PID loop for precise temperature regulation.

Technical Specifications

The 1746-BTM operates with a backplane current draw of 110 mA at 5 Volts and 85 mA at 24 Volts. Its inputs support thermocouple types J and K with voltage ranges of -50 to 50 mV and -100 to 100 mV. It offers a 16-bit resolution using Sigma-Delta A/D conversion and ensures reliable isolation with 1000 Volts channel-to-channel protection. The module features an 8 Hz bandwidth and integrates seamlessly into any chassis slot except Channel 0.

Features and Performance

This module supports tuning-assisted process algorithms and PID calculations directly within the hardware, reducing processor load. Each loop provides either a numeric manipulated variable output or a time-proportioned output, which can be directed to an analog or digital output module. The 1746-BTM includes auto-calibration, self-diagnostics, and detection of open thermocouple circuits, ensuring high system reliability.

Applications

The Allen-Bradley 1746-BTM is specifically optimized for extrusion and molding processes requiring precise barrel temperature management. It maintains closed-loop control with autotuned PID loops, making it essential for industries that depend on stable heating and cooling cycles.

Compatibility and Connections

This module works with all SLC 500 processors except the SLC 5/01 and requires the 1746-RT32 connection hardware for installation. It occupies a single slot, ensuring efficient use of chassis space in compact control panels.