Juniper QFX10000-PWR-DC Switches

Each QFX10000-PWR-DC power supply weighs approximately 6 lb (2.7 kg) and has two independent pairs of DC input lugs (Input 1, RTN, –48V/–60V and Input 2, RTN, –48V/–60V) on the faceplate of the power supply. Each inlet requires a dedicated DC power feed. Although each inlet provides sufficient input power to provide full output, always connect to a dedicated DC power feed to provide redundancy. Only one power feed is operational at a time. DC power models employ electronic A-B input selection. It provides 2n source redundancy and n+1 power supply redundancy using fewer power supplies than you would require in a 2n configuration. Should one power source fail, electronic A-B input selection switches the power supply to the alternate source.