Power Subsystem; Server Block Diagram - Oracle X5-8 Service Manual

Server Block Diagram

Caution -
is in full power mode. This action removes power from the CMODs and causes an immediate
shutdown. On an eight-CMOD system, this applies to all fan modules. On a four-CMOD
system, this applies to the fan modules in the left-hand fan frame.
For FM reference and servicing information, see
Frames" on page

Power Subsystem

Chassis power is provided by four hot-serviceable front-side accessible power supply units
(PSUs). The four PSUs provide dual (2+2) redundancy. Therefore, the minimum PSU
configuration is two. To ensure redundancy, power for the server should come from at least two
separate circuits.
When the AC power cords are connected to AC inputs at the back of the chassis, the PSUs
supply power to the Ethernet ports, the system sensors and inventory circuits, and the service
processor (SP). When power is supplied to the SP, it boots, and the server enters the low-power
standby power mode.
Once the SP boots into standby power mode, full power mode is initiated by pressing and
releasing the chassis front-panel Power button or by powering on the server remotely from
Oracle ILOM.
For more information about power modes, see
Resets" on page
Server Block Diagram
The following illustration shows the a block diagram of the server interconnects between the
CMODs, the midplane, and the SMOD. It also shows the interconnects between attached and
integrated components:
50 Oracle Server X5-8 Service Manual • December 2015
Data Loss. Do not remove more than one fan module from a column while the system
117.
107.
"Servicing Fan Modules and Fan
"Power Modes, Shutdowns, and