Siemens simatic s7 200 compact digital power supplies siemens 6es7212 1bb23 0xb0 this compact digital ac power supply has a 120230v ac supply voltage and a 24v dc100 to 230v ac load voltage this intelligent unit features integrated counters and timers and also program and data memory modules siemens 6es7212 1bb23 0xb0 sps controller cpu 222