The Allen Bradley 1746-BTM is a Barrel Temperature Control Module for the SLC 500 system. It is an intelligent I/O module that accommodates 4 zones of autotuned heat/cool PID loops for temperature control applications.

• Four independent temperature control loops with autotune PID capability
• Supports Type J and K thermocouples for process variable input
• Configurable response to broken sensor detection
• Selectable barrel control mode (ON/OFF) for different heating/cooling applications
• 16-bit analog-to-digital converter with 0.1° resolution
• Supports both Celsius and Fahrenheit temperature readings
• User-configurable high and low alarms with deadband for hysteresis
• Self-calibration capability (requires external reference)

• 4 thermocouple input channels (Type J and K)
• 16-bit A/D converter resolution (0.1° resolution)
• Heat and cool CV signals as numeric % values or TPO bits
• Temperature display in °C or °F
• Input open-circuit detection
• Isolated thermocouple inputs for each PID loop