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6-2 Compaq TA1000 Tape Drive Array Reference Guide
Storage Array Power
Temperature Sensing
Blower Interface
The power supply and blower assembly mount in the rear of the enclosure.
The power supply is auto-ranging and operates on an AC input voltage of 100
to 242 VAC ±10%, 50 to 60 Hz ± 5% (90 to 264 VAC, 47 to 63 Hz).
The DC outputs of this power supply are:
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+5.1 VDC for the EMU, I/O module, backplane, and drives.
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+12.1 VDC for the drives.
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+12.5 VDC for the blower.
The power supply circuitry provides protection against:
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Overloads
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Short circuits
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Thermal protection against overheating
Power supply status and diagnostic information is reported to the EMU with
voltage, current, and temperature signals.
The power supply temperature sensor provides a temperature range signal to
the EMU. The EMU can use this signal to set the blower speed. The power
supply internal temperature can also set the speed of the blower. The higher
the power supply temperature, the faster the speed of the blower. Should the
power supply temperature exceed a preset value, the power supply is shut
down.
The blower mounts on the rear of the power supply. A power supply connector
is the interface between the blower and the enclosure. The interface signals
include:
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Blower speed control to the blower
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Blower speed to the EMU through the power supply
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Power supply high speed enable
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Blower operating voltage
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