Siemens analogue input output module 6es7234 4he32 0xb0 sm 1234 siemens 6es7234 4he32 0xb0 p the siemens 6es7234 4he32 0xb0 is a sm 1234 analogue input output signal module that will convert analogue signals from the process into digital signals for internal processing by the simatic s7 1200 for controlling the respective process the module is snapped onto the din rail next to the cpu on the right and they become electrically and mechanically connected to each other p siemens 6es723