System Components
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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 dis-
tributes the 48 VDC power.
The system can have up to three power regulators. These regulators are
used in parallel, one or two for the required load plus an additional regula-
tor for backup in case of failure. Power regulator filler modules are used in
unused slots to help direct airflow.
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.
Uninterruptible power system (UPS) capability can be provided by the ad-
dition of the optional battery PIU. The battery PIU is mounted in the
bottom of the system cabinet and provides a minimum of 8 minutes of op-
erating time. Nominal full system operating time is 11 minutes.
For more information:
Basic Troubleshooting