Siemens 6EP1336-2BA10 SITOP PSU100S 20 A Stabilized Power Supply. SITOP PSU100S 20 A stabilized power supply input: 120/230 V AC output: 24 V DC/20 A. It belongs to 1-phase, 24 V DC. Recorded manufacturer technical characteristics include Efficiency: 90 %; Input voltage: 120/230 V AC; Rated output current: 20 A; Rated output voltage: 24 V DC.