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TM 11-5820-890-20-2
1-26
SECTION III
PRINCIPLES OF OPERATION
1.9.
GENERAL.
This section covers the principles of operation for the RT 1523 series ancillary equipment, AN/VRC 87C, and
AN/VRC 88C.
1.10.
DC POWER INPUT AND DISTRIBUTION.
a.
Battery Power for Dismounted RCU. The primary battery, BA 5590/U (lithium, non rechargeable),
BB 590/U (NiCad, rechargeable), or BB 490 (lead acid, rechargeable) is used to provide power. These
batteries are used to provide 10.5 to 15.5 V dc through the system connector (P1) on the back of the
RCU. Battery box CY 8523 series, with its associated latches, holds the battery to the RCU.
b.
Vehicular Power. The vehicular battery provides an input voltage that may vary from 22 to 32 V dc. The
battery is connected to the MB by a power cable. In some vehicles, the cable is connected to a terminal
block which is connected to the battery.
c.
Power Distribution in Mounting Base MT 6352/VRC or MT 6576/VRC. The 22 to 32 V dc enters the
MB on pin B of connector J1 and is wired to pin B of J2, J3, and J4. Connector J3 or J4 supplies 22 to
32 V dc to be used by the AN/VIC 1(V) (VIC), the LS 671 loudspeaker and other ancillary equipment.
H U S K A D C B
N U S P
A H U S K D C B
V F M K H
C
C A D
B
A C D
B
FL1
FL2
A E
B
D
+
-
POWER CABLE
J5
J4
J3
J2
J1
MOUNTING
BASE
TO LS 671,
AN/VIC 1
TO PA MOUNT, SECOND RADIO MB,
OR ANCILLARY 28 V EQUIPMENT
TO LS 671,
AN/VIC 1
Mounting Base Power Distribution
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