Siemens 6EP1536-3AA00 SITOP PSU400M DC/DC Converter. SITOP PSU400M 20 A DC/DC converter input: 600 V DC output: 24 V DC/20 A. It belongs to SITOP PSU400M. Recorded manufacturer technical characteristics include Summary: Input: 600 V DC, Output: 24 V DC/20 A; Siemens family path: SITOP power supplies > DC/DC converter > SITOP PSU400M.