The RPS-1124 battery charger is a 19'' rack frame with a height of four units, designed to house two PWS-1124 power supply modules and a BCU-1124 battery charger module. This feature makes it particularly suitable in configurations where a redundant power supply is required, in fact it is possible the hot-swapping (without interrupting the power supply) of the single modules, whether they are PWS-1124 or BCU-1124.