J9828A

Power Redundancy - if any one of the power supplies should fail, the remaining supply or supplies provide the power to continue running a fully loaded 5400R zl2 switch.
Power Load Sharing - with two supplies installed, each shares the power load, which increases the life of both of the power supplies.
Hot Swap Operation - you can add or replace one of the Power Supplies without having to shut down or reboot the switch.
Automatic Fault Detection - if the power supply encounters a problem, the Switch can immediately detect the condition and report it by way of the Power Status and Fault LEDs on the switch and the Fault LED on the power supply. Event messages will also be displayed in the switch console event log and the web browser interface Alert log.
Power and Fault LEDs - The Power LED (green) is lit when power is supplied to the power supply. The Fault LED (orange) is lit when there is a fault condition with the power supply.