DuraComm Corp. - Rack Supply, 10A/48-56V The DuraComm RU1-1048 rack mount power supply ( 1 3/4 x 5x 19 inches) maximizes valuable rack space. The power rectifier features auto adjusting AC input range (85 - 264 VAC) to produce a 48-56 VDC output. This 10 amp continuous power supply produces energy savings of 25 percent due to power factor correction circuits. The DuraComm space saving rack mounted power supply includes short circuit, overload, and over temperature protection. The power supply is fan-cooled.