Installing a hot-swap ac power supply
Use this information to install a hot-swap ac power supply.
About this task
The following notes describe the type of power supply that the server supports
and other information that you must consider when you install a power supply:
v Before you install an additional power supply or replace a power supply with
one of a different wattage, you may use the IBM Power Configurator utility to
determine current system power consumption. For more information and to
download the utility, go to http://www.ibm.com/systems/bladecenter/
resources/powerconfig.html.
v The server comes with one hot-swap 12-volt output power supply that connects
to power supply bay 1. The input voltage is 100-127 V ac or 200-240 V ac
auto-sensing.
v Power supplies in the server must be with the same power rating or wattage to
ensure that the server will operate correctly. For example, you cannot mix
550-watt and 750-watt power supplies in the server.
v Power supply 1 is the default/primary power supply. If power supply 1 fails,
you must replace the power supply with the same wattage immediately.
v You can order an optional power supply for redundancy.
v 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 server supports a maximum of two power supplies.
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.
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2
Statement 8
72 IBM System x3550 M4 Type 7914: Installation and Service Guide
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