Power System; Power-On/Off Procedures Of Main Line Switch - Fujitsu SPARC ENTERPRISE M9000 Service Manual

4.5.1.2

Power System

There are two types of power system: single power and dual power.
FIGURE 4-3
FIGURE 4-3
Distribution panel
The dual power feed option receives power from two external AC power sources
that are independent of each other, and it duplicates the input power system.
The dual power feed can be used with either single-phase or three-phase power
feed.
4.5.2

Power-On/Off Procedures of Main Line Switch

On the server with expansion cabinet, when you turn on or turn off the main line
switch, do not fail to follow the order described below.
4-26 SPARC Enterprise M8000/M9000 Servers Service Manual • June 2010
shows the conceptual diagram of power system.
Power System (Single Power / Dual Power)
Single power feed
Cabinet
PSU
ACS
AC
Dual power feed
ACS
AC
Distribution panel
Cabinet
PSU
PSU
ACS
AC
Distribution panel