Switch mode buffer power supply units PSB are intended for continuous power supply to devices that require stabilised voltage of 12, 24 or 48 V DC (±15%) . Size: 199 x 110 x 50 mm. Uin=~200 – 240 V, Uout=54VDC. ?I=3A. SCP (Short Circuit Protection), OLP (Overload Protection), OVP (Over Voltage PRotection), UVP (Deep Discharge Battery Protection).