12Various power supplies are available from Siemens ranging from 2 amps to 20 amps with single phase 110/220 V input supply and from 5 amps to 40 amps with 3 phase 415 V input supply. 24v DC outputs are provided with short circuit protection. Elegantly and ruggedly designed independent and rack mounted PLC power supplies are also available. 30 V DC supplies are specially designed for ASI systems.