The 6ES7231-5QD50-0XB0 is a thermocouple board.
It belongs to the SIMATIC S7-1200 G2 series.
It provides 4 thermocouple input channels.
It reads temperature signals in millivolts.
It supports type J and K thermocouples.
It also supports R, S, B and T types.
It plugs into the CPU front slot.
It is a Siemens S7-1200 signal module.

