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Chapter 3 Install Components
C
3
HAPTER
Install Components
About Power Distribution Unit Installation
Mount power distribution units (PDUs) in the bottom units of the rack. The one-
phase PDUs mount on the rear rack rails while the 2U three-phase PDUs mount
on the front rails. The default configuration places up to four 1U 220V, 30A PDUs
at the bottom of the rack.
Prerequisites:
● A 1U or 2U PDU
● Torx T20 screw driver
● Four snap-in cage nuts (for square mounting holes) or four clip-on cage
nuts (for round mounting holes)
● Four 10-32 x 1/2" Torx Washer Head screws
Important! We strongly recommend that you use Pillar Axiom 600 PDUs. If you
install non-Pillar PDUs, they must meet the PDU specification described in the
Pillar Axiom Site Preparation Survey and in the hardware specifications appendix.
Important! If the external power supplied to the Pillar Axiom 600 is 208V instead
of 230V, the number of components that can be powered by a single PDU is
reduced. Because of the lower voltage of 208V circuits, use of this connection
type lowers the number of Bricks that can be placed in a rack. Pillar recommends
using 230V circuits instead.
Tip: Use a voltmeter to verify the voltage of the available power. The Pillar
Axiom 600 PDUs support multiple ranges of voltage and the current rating on the
PDU breakers varies with the external available power. The external available
power determines the number of Pillar Axiom 600 components that can be
connected to the PDU port groups or circuit breakers (CB). If the voltage of the
input power into the PDU is lower than the nominal rating of the PDU, the current
rating on the breakers is decreased to compensate the lower voltage of the
available power. For example, a 15A breaker on a 230V PDU is rated at 12A if
the voltage of the input available power into the PDU is 208V.
About Power Distribution Unit Installation
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