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Cisco 8500 Series Wireless Controller Installation Guide
Chapter 1 Cisco 8500 Series Wireless Controller Installation Guide
Grounding the Chassis
Turning on the Cisco 8500 Series Wireless Controller
Approximately 5 seconds after the controller is connected to power, one or more fans might start running
to provide cooling while the system is connected to power, and the power-on button LED will blink
quickly. Approximately 20 to 40 seconds after the controller is connected to power, the power-control
button becomes active (the power-on LED will blink slowly), and one or more fans might start running
to provide cooling while the controller is connected to power. You can turn on the controller by pressing
the power-control button.
If a power failure occurs while the controller is turned on, the system will restart automatically when
power is restored.
Turning off the Cisco 8500 Series Wireless Controller
When you turn off the controller and leave it connected to power, it can respond to requests to the service
processor, such as a remote request to turn on the controller. While the controller remains connected to
power, one or more fans might continue to run. To remove all power from the controller, you must
disconnect it from the power source.
Caution 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.
The integrated management module (IMM) can turn off the controller as an automatic response to a
critical system failure.
Grounding the Chassis
Caution All power supplies must be grounded. The receptacles of the AC power cables used to provide power to
the chassis must be the grounding type, and the grounding conductors should connect to protective earth
ground at the service equipment.
Preventing ESD Damage
Electrostatic discharge (ESD) damage occurs when electronic cards or components are improperly
handled and can result in complete or intermittent failures.
Always use an ESD-preventive wrist or ankle strap and ensure that it makes good skin contact. Connect
the strap to any unpainted surface on the chassis