1-28
Cisco Flex 7500 Series Wireless Controller Installation Guide
Chapter 1 Cisco Flex 7500 Series Wireless Controller Installation Guide
Grounding the Chassis
When the controller is connected to an ac power source but is not turned on, the operating system does
not run, and all core logic except for the service processor (the Integrated Management Module) is shut
down; however, the controller can respond to requests to the service processor, such as a remote request
to turn on the controller. The power-on LED flashes to indicate that the controller is connected to power
but is not turned on.
Turning on the Cisco Flex 7500 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 Flex 7500 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.
