RACK mounted buffer power supply unit. ROUPS 54V/5A RACK mounted buffer power supply unit(W=19”, H=2U, Power supply output: 1 x 4,5A/54VDC, Fuse type: glass fuse – 1x5A, Battery charging current: 0,5A, Efficiency: 85%). Power supply: 176÷264VAC, Technical output of the relay type: ALARM – collective failure.