Appendix E
Introduction to Component Power Consumption
247
Pillar Data Systems Confidential
Single-Phase PDUs
Single-phase (115 V / 230 V) PDUs have 16 power outlets,
which are organized into two groups of eight. Each group is
controlled by a separate circuit breaker (CB), as shown in
• For CB-1, all eight outlets are located at the rear of the
PDU.
• For CB-2, four outlets are located at the rear of the PDU
and four are located at the front, next to the breakers.
Figure 65 Single-phase PDU circuit breakers (front view)
shows the distribution of the twelve outlets on the
back of the PDU across the two circuit breakers.
Figure 66 Single-phase PDU outlet distribution (back view)
Single-phase PDUs are used in pairs: two for a small system
and four for a fully populated rack.
CB 1
CB 2
(CB-2 also switches
four additional outlets
on the front of the PDU)
PDU
1
2
3
4
1
2
3
4
5
6
7
8
Power inlet
CB-2
CB-1