Checking The Power Input Type; Redundant Configuration Of Power Supply Units - Fujitsu ORACLE M10-1 Installation Manual

Other devices mounted in the rack must not cause the temperature at the intake
part of any chassis to exceed the limit value. This limit value in environmental
conditions assumes that each chassis operates with the rack door closed.
2.8

Checking the Power Input Type

This section describes the power input types that can be used with the SPARC M10
systems. To prevent serious accidents, confirm that the power supply facilities can
supply sufficient redundant power to the system.
The server can use the following power input types:

Redundant configuration of power supply units

■
Dual power feed
■
Three-phase power feed
■
Uninterruptible power supply (UPS) connection (optional)
■
2.8.1 Redundant configuration of power supply units
Each chassis has power supply units in a redundant configuration as standard. If a
failure occurs in one power supply unit, the system can still continue to operate with
the other power supply unit. However, if a failure occurs in the external power
supply, the system stops.
Figure 2-6
When connecting the power cords to the same input power supply, make sure to
connect each power cord to the connection destination in a one-to-one manner.
Figure 2-6 Power supply system with redundant power supply connections
PSU#0 PSU#1
shows a power supply system with redundant power supply connections.
AC power
CB
CB
Chapter 2 Planning and Preparing for System Installation
CB: Circuit breaker
25