RACK mounted buffer power supply unit. ROUPS 13,8V/20A RACK mounted buffer power supply unit(W=19”, H=2U, Power supply output: 1 x 18A/13,8VDC, Fuse type: glass fuse – 1x20A, Battery charging current: 2A, Efficiency: 85%). Power supply: 176÷264VAC, Technical output of the relay type: ALARM – collective failure.