The 517EPS1 External Rack Power Supply is designed to supply power to two 517R1 Card Cage Racks. It may also be configured to provide redundant power to a single rack. The unit has two operatinig channels with a maximum output of 9.0 amps per channel at 13.5 VDC. The 571EPS1 accepts 115/230 VAC, 60/50 Hz inputs.