Digital Equipment StorageWorks UltraSCSI DS-BA370 Series, Руководство пользователя

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Enclosure Blowers
UltraSCSI RAID Enclosure 8–3
Function and Operation
Cooling the components is accomplished by pulling in air through the front
of each component, over the internal circuitry, through the backplane, and
exhausting it out the rear of the enclosure. The +12 V dc for blower
operation is available on each of the backplane blower connectors. The
blower status and speed control signals are also on these connectors and are
routed to the EMU and the PVA. The blower guide pin ensures you can
align the connectors when installing a blower. The combination of the
connectors and the blower mounting tabs provide positive mating of the
blower with blower plenum.
When an error condition involving the blowers, the intake temperature, or
the exhaust temperature exists, the EMU can cause all blowers to switch to
high speed to increase air flow through the enclosure. The conditions that
can cause this change in blower speed include:
•
Removing a blower
•
A blower operating too slowly
•
A stalled blower
___________________ Caution ____________________
The only StorageWorks dual speed blower that is compatible
with the UltraSCSI RAID enclosures is the model DS–BA35X–
MK. You cannot use the BA35X–MD dual-speed blower as a
replacement.
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