Dell POWEREDGE 1855 - Manual (Page 46)

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Installing System Options
Dell™ PowerEdge™ 1855 Systems Installation and Troubleshooting Guide
Power Supply Modules
Fan Modules
DRAC/MC Module
KVM Module
Chassis I/O Module
Server Modules
Removing and Installing Server Module Components
The procedures in this section describe how to remove and install system components and server module components, including:
l Power supply modules
l Fan Modules
l Dell™ Remote Access Controller/Modular Chassis (DRAC/MC) module
l KVM modules
l Network switch modules
l Server modules
Power Supply Modules
Your system contains up to four hot-pluggable power supply modules that are accessible from the system chassis back panel.
System Power Guidelines
The Dell™ Remote Access Controller/Modular Chassis (DRAC/MC) module controls the power distribution to the chassis and the server modules. The DRAC/MC
is programmed to allocate the theoretical maximum power of a chassis with all back-panel modules installed and the theoretical maximum power of a fully-
loaded server module for power management and protection purposes. Actual power usage depends on a system's particular configuration; for example, the
number of modules installed in the chassis back panel; the number of processors, memory modules, and hard drives installed in a server module; and the
number of server modules installed in the chassis.
The number of installed power supply modules determine if your system is redundant. Your system has one of the following configurations:
l Two 2100-W power supply modules, which do not provide redundancy if one power supply module fails
l Four 2100-W power supply modules, which provide redundancy if one power supply module fails
l Three 1200-W power supply modules (systems sold prior to April 2005), which do not provide redundancy if one power supply module fails
l Four 1200-W power supply modules (systems sold prior to April 2005), which provide redundancy if one power supply module fails
Removing a Power Supply Module
1. Disconnect the power cord from the power supply module.
2. Press down on the power supply module release tab. See Figure 6 -1 .
3. Rotate the power supply module handle down to eject the power supply module.
NOTE: 2100-W power supply modules require 170-264 V to operate; 1200-W power supply modules (systems sold prior to April 2005) require 180–264
V to operate. If they are plugged into 110-V electrical outlets, the power supply modules will not power up.
NOTE: In addition to supplying power to the system, the power supply modules also have internal fans that provide thermal cooling for the server
modules. A power supply module must be replaced if an internal fan failure occurs.
NOTE: Depending on a non-redundant system's particular configuration, it is possible for some of the server modules to continue to operate even
though a power supply module fails. If this occurs, and the server module that you want to operate is off, then power down the operating server
modules until the desired server module powers up.
In addition, if you install a new server module and it does not power up, ensure that your system meets the normal operating-power configurations
listed above. Only those configurations support a fully-loaded system.
NOTE: The wattage of a power supply module is listed on its regulatory label.
NOTICE: The power supply modules are hot-pluggable. Remove and replace only one power supply module at a time in a system that is turned on.