Auxiliary Voltage Supply 3 Ac 500 V 50 Hz (Option C43); Auxiliary Voltage Supply 3 Ac 550 V 50 Hz (Option C44); Auxiliary Voltage Supply 3 Ac 575 V 60 Hz (Option C46); Auxiliary Voltage Supply 3 Ac 690 V 50 Hz (Option C48) - Siemens SINAMICS SM120 Operating Instructions Manual