AlphaServer 8400 System
3
-
13
The power system uses H7263 power regulators (see Figure 3-6), requiring three-phase
AC. Two types of H7263 regulators are available. The H7263–AA/AB regulators
(optional) have the ability to use and charge optional battery packs. The H7263–
AC/AD regulators, shipped with a standard 8400 system, do not allow battery backup.
Both types of power regulator allow switching between regulators in the event one
fails. Power regulator filler modules are used in unused slots to help direct airflow.
The DC distribution box and AC input box are located on the upper left of the system
cabinet (when viewing the system cabinet from the rear). The 48 VDC power
regulators are located at the upper right side (when viewing the system cabinet from
the front).
The AC input box provides the interface for the system to the AC utility power. The
main input circuit breaker, on the AC input box, contains a circuit breaker trip
indicator to indicate an open circuit breaker. The DC distribution box connects the AC
input box and power regulators. It distributes the 48 VDC power.
NOTE: Additional options can increase the power requirements so that an additional
power regulator may be needed.
The cabinet control logic (CCL) module has a yellow power LED. When this LED is
on, the CCL module is receiving 48 VDC power from the power regulators.
Battery backup capability can be provided in systems with H7263–AA/AB regulators
by the addition of the optional battery PIU. The battery PIU is mounted in the bottom
of the system cabinet and provides approximately 11 minutes of operating time in N+1
configured systems.
