Supplying Power To The Bladecenter Unit; Disconnecting Power From The Bladecenter Unit - IBM 8852 - BladeCenter H Rack-mountable Service Manual

Supplying power to the BladeCenter unit

To supply power to the BladeCenter unit, connect one end of each power cord to a
power connector on the rear of the BladeCenter unit and the other end of each
power cord to a 220-volt PDU that is connected to an appropriate electrical outlet.
The BladeCenter unit does not have a power switch.
After the BladeCenter unit has power, the blade servers in the BladeCenter unit are
connected to power but are not turned on. Depending on the configuration
settings, the blade servers might have to be individually turned on.

Disconnecting power from the BladeCenter unit

You can shut down the BladeCenter unit by turning off the blade servers and
disconnecting the BladeCenter unit from the power source.
To disconnect power from the BladeCenter unit, complete the following steps:
1. Shut down the operating systems and turn off any blade servers. See the
2. Disconnect both power cords from the BladeCenter unit.
documentation that comes with the blade server for detailed instructions.
Statement 5:
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.
2 / 3 1 / 4
Attention: The power cords on the rear of the BladeCenter chassis are not
approved to be connected or disconnected under power. You must first
disconnect the power cords from the ac power source; then, you can remove
the power cords from the chassis connectors.
Note: After you disconnect the BladeCenter unit from power, wait at least 5
seconds before you connect the BladeCenter unit to power again.
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Chapter 1. Introduction