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TM 11-5820-890-20-2
5-3
5.1.
THEORY OF OPERATION. Continued
A
B
C
27 V DC
200 V DC
13 V DC
6.75 V DC
K1
CB1
DS1
P1
E
POWER SUPPLY A1
POWER SUPPLY ADAPTER
S1
(RMT)
(LCL)
B
F
C
E
D
A
J4
13 V DC to RT system
connector J2, pin F.
27 V DC
CR3
CR4
WARNING: ALL POWER SUPPLY VOLTAGES,
INCLUDING THE 200 V DC, ARE
PRESENT AT POWER SUPPLY
ADAPTER CONNECTOR J5.
MX 10862/VRC Power Distribution
RELAY CONTROL LINE
DC TO DC
CONVERTER
TRANSIENT
SUPPRESSOR
(5) Power Distribution in Battery Tray CY 8664 (Refer to PDD8). The CX 13290 cable is used to
connect power supply adapter connector J4 to battery tray connector J1. The 22 to 32 V dc
present at power supply adapter connector J4, pin F, is sent through the cable to battery tray
connector J1, pin F. This voltage energizes battery tray relay K1 to the closed position. K1 will remain
energized from 2 to 32 V dc. The battery box is connected to battery tray connector P1, to provide
the 13 V dc to the RT. The 13 V dc exits battery tray J1, pin E, through the cable to power supply
adapter connector J4, pin D. Pins E and A are ground at power supply adapter connector J4. Pins
D and A are ground at battery tray connector J1.
A test switch is provided on the battery tray to test the battery voltage . If the test switch is
pressed and the battery is good, then DS1 lights. If the test switch is pressed and the battery is
bad, then DS1 does not light.
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