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Installing A Hot-Swap Ac Power Supply - IBM 7945G2U Installation And User Manual

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Installing a hot-swap ac power supply

The following notes describe the type of ac power supply that the server supports
and other information that you must consider when you install a power supply:
v Make sure that the devices that you are installing are supported. For a list of
v Before you install an additional power supply or replace a power supply with one
v The server comes with one hot-swap 12-volt output power supply that connects
v You cannot mix 460-watt and 675-watt power supplies, high-efficiency and
v The following information applies when you install 460-watt power supplies in the
v Power supply 1 is the default/primary power supply. If power supply 1 fails, you
v You can order an optional power supply for redundancy.
v These power supplies are designed for parallel operation. In the event of a
v For instructions on how to install a hot-swap dc power supply, refer to the
Statement 5:
System x3650 M3 Types 4255, 7945, and 7949: Installation and User's Guide
supported optional devices for the server, see
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
to power supply bay 1. The input voltage is 110 V ac or 220 V ac auto-sensing.
non-high-efficiency power supplies, or ac and dc 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
– 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 145)
The following table lists the system status when you install 460-watt power
supplies in the server:
Table 12. System status with 460-watt power supplies installed
Total system power
Number of 460-watt power supplies installed
consumption (in
< 400
400 ~ 460
Normal, status
> 460
System shutdown
must replace the power supply immediately.
power-supply failure, the redundant power supply continues to power the system.
The server supports a maximum of two power supplies.
documentation that comes with the dc power supply.
Two with one failure
Normal, redundant
Normal, redundant
Normal, status
System shutdown



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