NonStop NS-Series Planning Guide (H06.05+)

Modular System Hardware
HP Integrity NonStop NS-Series Planning Guide—529567-008
5-10
Power Distribution Units (PDUs)
This illustration shows the AC power feed cables for the PDU and UPS for AC power
feed from the bottom of the cabinet when the optional UPS and ERM are installed:
Each PDU is wired to distribute the load segments to its receptacles.
Caution. If you are installing Integrity NonStop NS-series system enclosures in a modular
cabinet, balance the current load among the available load segments. Using only one of the
available load segments, especially for larger systems, can cause unbalanced loading and
might violate applicable electrical codes. Connecting the two power plugs from an enclosure to
the same load segment causes failure of the hardware if that load segment fails.
08
09
03
04
05
06
07
01
02
08
09
03
04
05
06
07
01
02
Uninterruptible
Power Supply
(UPS)
VST153.vsd
38
39
40
41
42
37
38
39
40
41
42
37
To AC Power Source
Power
Distribution
Unit (PDU)
Extended Runtime
Module (ERM)
Unused
Cable
Extension bars are
installed along the rear
right side instead of a
PDU when a UPS is
installed in the modular
cabinet
To AC Power Source