Power modules
The BladeCenter S system supports up to four autoranging power modules that are capable of supporting either 110 V ac or 220 V ac.
There are two types of power modules. These power modules are identical except for the power cord connector; one power module has a C14 connector and the other power module has a C20 connector. Both types of power modules can be installed in the same chassis.
Power module with C14 connector  | Power module with C20 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.NoteBefore 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.
- Verify that the power modules are properly connected to an AC power source. All power modules in the BladeCenter S chassis must be connected to the same power input voltage (either 110 V ac or 220 V ac). Do not mix power input voltages.
- Unplug the AC power cord from the power module and plug it in again.
- Reseat the power supply.
- Swap the AC power cord with a power cord that is known to be working.
- Move the power module to another power module bay in the BladeCenter S chassis.
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