HP ProLiant DL560 Server High Density Deployment
hp ProLiant DL560 server high-density deployment white paper
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table 10: power statistics for high voltage 10-chassis redundant power configuration
description value
control unit current handling capacity 24 amperes
control unit load ~ 12 amperes under normal operating
conditions with both feeds active
~ 24 amperes under fault condition where
either the primary or secondary power
feed has failed
(Server load in example is based on the
Power Calculator output using 4 CPUs,
6-GB memory, 72-GB hard drives x 2, and
2 PCI cards)
headroom current available for rack
peripherals
0 amperes
If additional infrastructure loads are
required to support the operation of the
rack, it is suggested that you add
additional PDUs or remove one or more
servers to create headroom for
peripherals.
power cord used for server-to-extension
bar jumper
C13 to C14 (PN 142256-006) quantity of 1
C13 to C14 (PN 142256-007) quantity of 15
high voltage
(230 VAC)
15-chassis
redundant power
configuration
The following illustration (figure 9) shows a redundant power configuration
where high voltage (230 VAC) is distributed to 15 server chassis in a rack that
receives primary and secondary power busses. Each power bus is handled by a
modular PDU that consists of a control unit and three extension bars. Each
control unit can handle a maximum of 32 amps. Under normal operation, the
power supplies in each server would be sharing the load of the server and
each PDU would only see 50% of the full load of each server. Therefore, under
normal conditions, each PDU would be loaded to approximately 15.75 amps.
However, if either the primary or the secondary feed were to fail, the remaining
PDU would be loaded to the full load of each server or approximately 31.5
amps. In this case, either core could be called on to provide approximately
31.5 amps to the servers, leaving about 0.5 amps of headroom for auxiliary
devices, such as KVMs, a TFT display, and rack monitoring devices. Refer to
table 11 for power statistics for the high voltage 15-chassis configuration.