User`s guide

Power and Cooling Systems
• If the system has a VAXBI bus, the operating system stores all current
VAXBI processes during the same 500 millisecond period. Power to the
VAXBI card cage is then disabled.
• The operating system stops.
• The H7236-A continues to power the XMI card cage so memory is
refreshed and data is held.
If system power returns within 10 minutes, a warm restart is performed.
The operating system continues from the point at which it stopped.
If the power outage is longer than 10 minutes, the H7236-A shuts off to
prevent the battery from draining. Memory data is lost, since memory is
cleared when power is restored.
4.2 Cooling System
The cooling system consists of two identical blowers, one for the front of
the cabinet, the other for the back. An airflow sensor signals a loss of
airflow.
The H7206-B unit has an internal fan.
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