IBM BladeCenter S Installation And User Manual page 33

Table 1. Power modules used in the BladeCenter S system
Power module with C14 connector
C14 connector
Within the BladeCenter S chassis, all power supplies are combined into a single
power domain, which distributes power to each of the blade servers and modules
through the system midplane.
You must install a minimum of two power modules. If you install only two power
modules, install them in power module bays 1 and 2 (the top and bottom power
module bays on the right as you face the rear of the BladeCenter S chassis).
Note: You must install all four power modules if you are using both disk storage
modules.
If you disengage or remove all devices from the front of the BladeCenter S chassis
(media tray, blade servers, and disk storage modules), the power modules will be
disabled.
Indicators and controls
There are three LEDs on each power module:
AC power
Lit (green). Power is being supplied to the power module.
DC power
Lit (green). Power is being supplied from the power module to the
BladeCenter S chassis midplane.
Fault Lit (amber). There is a fault with the power module.
Note: Before unplugging the AC power cord from the power module or
removing the power module from the BladeCenter S chassis, verify that the
capacity of the remaining power modules are sufficient to meet the
minimum power requirements for all components in the BladeCenter S
chassis. You can view power status and requirements through the
advanced management module.
For information on accessing and using the advanced management
module, see the Advanced Management Module User's Guide.
1. Verify that the power modules are properly connected to an AC power
source. All power modules in the BladeCenter S chassis must be
Power module with C20 connector
C20 connector
Chapter 1. Introduction
21