Cisco Systems 8500 User Manual

The following section describes the type of AC power supply that the controller supports and other 
information that you must consider when you replace a failed power supply: 

The Cisco 8500 Series Wireless Controller comes with two 675-watt hot-swap 12-volt output power 
supplies that connect to power supply bays 1 and 2. The input voltage is 110 VAC or 220 VAC 
auto-sensing.

Power supply 1 is the default/primary power supply. If power supply 1 fails, you must replace the 
power supply immediately. 

You can order replacement power supplies from Cisco. The replacement part PID is 
AIR-SRVR-PWR=.

These power supplies are designed for parallel operation. In the event of a power-supply failure, the 
redundant power supply continues to power the system. 

The power control button on the device and the power switch on the power supply do not turn off the 
electrical current supplied to the device. The device also might have more than one power cord. To 
remove all electrical current from the device, ensure that all power cords are disconnected from the 
power source.

Never remove the cover on a power supply or any part that has the following label attached. Hazardous 
voltage, current, and energy levels are present inside any component that has this label attached. There 
are no serviceable parts inside these components. If you suspect a problem with one of these parts, 
contact a service technician.

To install a hot-swap power supply, complete the following steps.

Read the safety information in 

Touch the static-protective package that contains the hot-swap power supply to any unpainted metal 
surface on the controller; then, remove the power supply from the package and place it on a 
static-protective surface.