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Cisco 8500 Series Wireless Controller Installation Guide
Chapter 1 Cisco 8500 Series Wireless Controller Installation Guide
Replacing a Hot-Swap -48 VDC Power Supply
Statement 33
Caution This product does not provide a power control button. The product also might have more than one power
cord. To remove all electrical current from the product, make sure that all power cords are disconnected
from the power source.
Statement 34
Caution To reduce the risk of electric shock or energy hazards:
• This equipment must be installed by trained service personnel in a restricted-access location, as
defined by the NEC and IEC 60950-1, First Edition, The Standard for Safety of Information
Technology Equipment.
To Connect To Disconnect
1. Turn off all power sources and equipment that
is to be attached to this product.
2. Attach signal cables to the product.
3. Attach power cords to the product.
• For AC systems, use appliance inlets.
• For DC systems, ensure correct polarity of
-48 VDC connections: RTN is + and -48 VDC
is -. Earth ground should use a two-hole lug
for safety.
4. Attach signal cables to other devices.
5. Connect power cords to their sources.
6. Turn on all the power sources.
1. Turn OFF all power sources and equipment
that is to be attached to this product.
• For AC systems, remove all power cords from
the chassis power receptacles or interrupt
power at the AC power distribution unit.
• For DC systems, disconnect DC power
sources at the breaker panel or by turning off
the power source. Then, remove the DC
cables.
2. Remove the signal cables from the
connectors.
3. Remove all cables from the devices.