Thermocouple Input with Open-Wire Detection
The Mitsubishi Q64TCTTBWN is a thermocouple input module for the Q series PLC that includes wire break protection, detecting open-circuit conditions on the thermocouple wires to prevent erroneous temperature readings from a failed sensor. Wire break protection means the module monitors loop continuity and flags a fault if the thermocouple circuit opens, critical for process safety and avoiding false low-temperature trips in heating control loops.