Facility Power Requirements And Characteristics - Sun Microsystems SPARC Enterprise M4000 Installation Manual

2.2.1.1

Facility Power Requirements and Characteristics

For proper redundancy your facility should have two independent power sources:
Either circuit breakers connected to separate power company utility feeds or UPS
(uninterruptible power system). For power redundancy the power cords should not
be connected to the same facility power source.
If the computer equipment is subjected to repeated power interruptions and
fluctuations, it is susceptible to a higher component failure rate than it would be
with a stable power source. There are two basic configurations:
Power Cords With Redundant PSU Connection (
■
Power Cords With Dual-power Feed Connection (
■
Note – If more than one power cable of this server is connected directly to the same
facility power source distribution panel, connect the power cords to outlets
independently using one cable per power feed.
SPARC Enterprise M4000 Server With Redundant PSU Connection
FIGURE 2-1
2-4 SPARC Enterprise M4000/M5000 Servers Installation Guide • November 2008
#1 #0
and
FIGURE 2-1
and
FIGURE 2-3
PSU#0 PSU#1
Circuit
breaker
)
FIGURE 2-2
)
FIGURE 2-4