Siemens 6EP4240-7HB00-0AX0 SITOP PBM1200 20 A/40 A power boost module input: 24-28 V | 48-56 V DC. SITOP PBM1200 20 A/40 A power boost module input: 24-28 V | 48-56 V DC. It belongs to Power boost module. Recorded manufacturer technical characteristics include Summary: Output voltage: 56 V DC, Rated current: 20 A; Siemens family path: SITOP power supplies > Add-on modules > Power boost module.