UNIPOWER’s Guardian Bulk M42 series is a 10RU high 19” rack-mounted DC power system that provides a bulk output of -48VDC. They incorporate six rectifier shelves with up to 23 Guardian family high-efficiency hot-swap rectifiers, with a maximum total current of 1200A (N+1). The rectifiers of the Guardian Bulk M42 series are internally fan cooled with speed control and feature ACX advanced controller monitoring to prevent system failures.