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2.3 THE PW1800 POWER SUPPLY
FRONT PANEL
РУУ1ВОО
REAR PANEL
FIGURE 2-10. PW1800 POWER SUPPLY.
104. POWER (On/Off)
This locking switch turns on the AC power to the
supply, and thereby provides the necessary voltages
to the console via the umbilical power cables. An ad-
jacent LED is on when power is on.
105. (Grille)
The power supply is cooled by a quiet running fan that
pulls air through this front-panel grille and exhausts it
through vents along the edge of the top and side panels.
A reticulated foam element behind the grille filters the
air entering the power supply.
NOTE:
The filter element is cleanable. Refer to Section 9.1.2
106. (Umbilical Connector)
This locking, multi-pin connector provides the nec-
essary DC voltages from the PW1800 power supply to
the PM1800 console. The cable must be connected
before attempting to operate the console.
CAUTION: Always make certain that the PW1800
power is turned OFF prior to connecting or discon-
necting the umbilical cable at the console or at the
power supply.
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3
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І
a
oo
дна
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e
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ОЕТЕСТ А
ОЕТЕСТ В
FIGURE 2-11. PW1800 UMBILICAL CONNECTOR PIN ASSIGNMENTS.
2-23
107. FUSES
Fuses protect the primary and secondary portions
of the PW1800 power supply. They should be replaced
only with fuses of the same current rating and type. The
primary fuse is accessible on the rear panel, andis a
ТА, 125V Slo-Blow type fuse. The internal secondary
fuses normally will not blow, but are as follows:
+ 17 VDC Supply 6 A Slo-Blow
— 17 VDC Supply 6 A Slo-Blow
-- 12 VDC Supply 10 A Slo-Blow
-- 48 VDC Supply 2 A Slo-Blow
108. (Power Cord)
This power cable connects the PW1800 to the AC
power mains. A grounded (3-wire) outlet of at least 15
amperes capacity should be used.
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