The module accepts four temperature sensor inputs — typically thermocouple or RTD — and passes the processed value to the CPU via the Q-series backplane. No standalone PID loop control; that runs in the PLC logic or a dedicated temperature control module like the Q64TCTTN's sibling, the Q64TCTT.
Peer Comparison — FX5-4LC
The Mitsubishi FX5-4LC is a 4-channel temperature controller for the MELSEC iQ-F (FX5) series. It occupies 8 I/O points and runs PID control on board, including heating/cooling and cascade. The Q64TCTTN is a Q-series module with a different form factor, backplane interface, and wiring terminal arrangement. They are not cross-compatible; swapping one for the other would require replacing the PLC rack and rewiring the field sensors. If you're sourcing a Q64TCTTN for a Q-series panel, the FX5-4LC is not a plug-in substitute.