The 6ES7231-4HD50-0XB0 is an analog board.
It belongs to the SIMATIC S7-1200 G2 series.
It provides 4 analog input channels.
It reads voltage and current signals.
It covers plus and minus 10 volts.
It also covers 4 to 20 milliamp loops.
It plugs into the CPU front slot.
It is a Siemens S7-1200 signal module.

