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Page Title:
Figure 3-2. M43 detector unit employing an M10 power supply. |
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 TM 3-6665225-12
Figure 3-2. M43 detector unit employing an M10 power supply.
detector unit, position the M42 alarm units with
d. M43 Detector Unit Employing M42 Alarm
relation to M43 detector unit so that telephone
Unit(s). A fixed emplacement arrangement of
cable (5) lengths will not exceed distances speci-
one M43 detector unit employing one to five M42
fied.
alarm units (fig. 3-3) permits the M43 detector
(3) String telephone cable between M43
unit to be remoted from an upwind location.
detector unit (2) and each M42 alarm unit (1)
NOTE
allowing approximately 1 foot of slack at end of
Do not connect more than one M43
each wire.
detector unit in a system.
(4) Tie each telephone cable wire to D-ring
Two-wire telephone cable is used to connect each
(7) on its associated M42 alarm unit about 9
M42 alarm unit to an M43 detector unit. The M42
inches from end of each telephone cable wire.
alarm units are placed at or close to monitoring
(5) Strip about one-half-inch of insulation
positions.
from end of- each wire.
The M43 detector unit and its power source are
(6) Without regard to polarity, connect a
placed up to 400 meters upwind. When more than
wire to each binding post (6) on M42 alarm unit.
one M42 alarm unit is connected to an M43 detec-
(7) Repeat (4) through (6) above for each
tor unit, the warning can be monitored at several
M42 alarm unit used.
positions.
(8) Strip about one-half-inch of insulation
(1) Perform applicable preoperation pro-
from the ends of the telephone cable wires to be
cedures (para 2-6) and pre-startup procedures
connected to the M43 detector unit.
(9) Tie each wire to loop (4) on M43 detector
(2) Using figure 3-3 as a guide for various
unit about 9 inches from end of telephone cable.
methods of connecting M42 alarm units to an M43
3-3
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