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Rev. 8.0
A26361-K863-Z102-8-7619
Power Management
The Power Supply Concept
11.2
Power Management
Depending on the available AC voltage range and the number of power supply
units available at a time (one or two) you have to take notice of some limitations
(see table 4).
Depending on the available AC voltage range, the maximal active power output
of the power supply units (PSU) is shown in the following table (see also section
“Technical Data” on page 8):
Power Management Limitations
I
The management blade checks the power situation when the blade
server system is switched on. Since at this time no detailed data of the
individual power requirements are available, it assumes the maximum
value for each server blade type.
Therefore in some situations it might be possible to switch on an
additional server blade afterwards. If for example none of the used server
blades has a memory extension, there might be enough power reserves
for an additional server blade.
The following table shows, that depending on the available AC voltage range on
the installed power supply units (each system has two PSU’s installed) and the
type of the server blades, the max. possible number of server blades might be
restricted.
I
Note that, in order to ensure power supply redundancy this is the
maximum number of server blades that can be plugged in.
AC voltage range
PSU type
max. active power output
100 - 127 V
1200 W
850 W
200 - 240 V
1200 W
Table 3: Maximal active power output depending on AC voltage range
