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:
• 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
.
• The server comes with one hot-swap 12-volt output power supply that connects to power supply bay 1.
The input voltage is 110 V ac or 220 V ac auto-sensing.
• You cannot mix 460-watt and 675-watt power supplies, high-efficiency and non-high-efficiency power
supplies, or ac and dc power supplies in the server.
• The following information applies when you install 460-watt power supplies in the server:
– A warning message is generated if the total power consumption exceeds 400 watts and the server only
has one operational 460-watt power supply. In this case, the server can still operate under normal
condition. Before you install additional components in the server, you must install an additional power
supply
– The server automatically shuts down if the total power consumption exceeds the total power supply
output capacity
– You can enable the power capping feature in the Setup utility to control and monitor power
consumption in the server (see
“Setup utility menu choices” on page 517).
The following table shows the system status when you install 460-watt power supplies in the server:
Table 21. System status with 460-watt power supplies installed
Total system power
consumption (in watts)
Number of 460-watt power supplies installed
One Two Two with one failure
< 400 Normal Normal, redundant power Normal
400 ~ 460 Normal, status warning Normal, redundant power Normal, status warning
> 460
System shutdown
Normal
System shutdown
• Power supply 1 is the default/primary power supply. If power supply 1 fails, you must replace the power
supply immediately.
• You can order an optional power supply for redundancy.
• 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.
• For instructions on how to install a hot-swap dc power supply, refer to the documentation that comes with
the dc power supply.
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.
Chapter 5. Removing and replacing components 465
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