Specifications

Chapter 5. Planning 141
80 PLUS is a performance specification for power supplies used within servers
and computers. To meet the 80 PLUS standard, the power supply must have an
efficiency of 80% or greater, at 20, 50, and 100 percent of rated load with a
Power Factor (PF) of 0.09 or greater. The standard has several grades, such as
Bronze, Silver, Gold, and Platinum. Further information about 80 PLUS is at the
following website:
http://www.80PLUS.org
Figure 5-9 shows the location of the power supply bays at the rear of the
Enterprise Chassis.
Figure 5-9 Power supply location
The Enterprise Chassis allows configurations of power supplies to provide N+N
or N+1 redundancy. Three (or six, for redundancy) power supplies allow for a
balanced, three-phase configuration.
All power supply modules are combined into a single power domain in the
chassis, which distributes power to each compute node and I/O module through
the Enterprise Chassis midplane. The midplane is a highly reliable design with no
active components. Each power supply is designed to provide fault isolation.
Power monitoring of the AC and DC signals from the power supplies allows the
Chassis Management Module to accurately monitor these signals.
Power
supply
bay 6
Power
supply
bay 5
Power
supply
bay 4
Power
supply
bay 1
Power
supply
bay 3
Power
supply
bay 2