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input, with each phase (International) or pairs of phases (North America/Japan) associated with
one of the c7000 power supplies. When the c7000 is operating in Dynamic Power Saving Mode,
the minimum number of power supplies are enabled to redundantly power the enclosure. This
mode increases power supply efficiency, but leaves the phases or phase pairs associated with
the disabled power supplies unloaded. For multiple-cabinet installations, in order to balance
phase loads when Dynamic Power Saving Mode is enabled, HP recommends rotating the phases
from one cabinet to the next. For example, if the first cabinet is wired A-B-C, the next cabinet
should be wired B-C-A, and the next C-A-B, and so on.
Enclosure Power Loads
The total power and current load for a modular cabinet depends on the number and type of
enclosures installed in it. Therefore, the total load is the sum of the loads for all enclosures
installed. For examples of calculating the power and current load for various enclosure
combinations, refer to “Calculating Specifications for Enclosure Combinations” (page 51).
In normal operation, the AC power is split equally between the two PDUs in the modular cabinet.
However, if one of the two AC power feeds fails, the remaining AC power feed and PDU must
carry the power for all enclosures in that cabinet.
Power and current specifications for each type of enclosure are:
Peak Inrush
Current (amps)
Apparent Power (volt-amps measured
on single AC line with both lines
powered)
2
Apparent Power
(volt-amps
measured on
single AC line with
one line powered)
AC Power Lines
per Enclosure
1
Enclosure Type
Total:Per line:
2104400220043002
c7000
3
153701853202IP CLIM
153701853202Storage CLIM
52801402602
SAS disk
enclosure
303261632622IOAM enclosure
143481742902Fibre Channel
disk module
4
27--1761Rack-mounted
system console
2--281Rack-mounted
keyboard and
monitor
4--441Maintenance
switch
(Ethernet)
5
1 See “Power Feed Setup for the NonStop BladeSystem” (page 38) for c7000 enclosure power feed requirements.
2 Total apparent power is the sum of the two AC power lines feeding the enclosure. Electrical load is shared equally
between the two lines.
3 Decrease the apparent power VA specification by 508VA for each empty Nonstop server blade slot. For example, a
c7000 that only has four NonStop Server Blades installed would be rated 4400 VA minus (4 server blades x 508 VA)
= 2370 VA apparent power.
4 Measured with 14 disk drives installed and active.
5 Maintenance switch has only one AC plug.
46 System Installation Specifications