2
I56-351-03
Base Terminals
NO.
FUNCTION
1
REMOTE ANNUNCIATOR (+)
2
NEGATIVE (–) V IN, REMOTE ANNUNCIATOR (–)
3
NEGATIVE (–) V OUT
4
NOT USED
5
POSITIVE (+) V IN AND V OUT
NOTE:
If remote annunciator is not used, polarity to these
terminals may be reversed.
Mounting
These detector bases mount to typical junction boxes. In-
stall the base to the box using the screws supplied with the
junction box. Figure 2 shows mechanical mounting details.
Wiring Installation Guidelines
All wiring must be installed in compliance with the Na-
tional Electrical Code and the local codes having jurisdic-
tion. Proper wire gauges should be used. The conductors
used to connect smoke detectors to control panels and ac-
cessory devices should be color-coded to prevent wiring
mistakes. Improper connections can prevent a system from
responding properly in the event of a fire.
For signal wiring, (the wiring between interconnected de-
tectors or from detectors to auxiliary devices), it is recom-
mended that single-conductor wire be no smaller than
1.5mm
2
, and that two- or three-conductor wire be no
smaller than 1.0mm
2
. For best system performance, alarm
loop conductors should be installed in separate grounded
conduit or shielded cable to protect the alarm loop from ex-
traneous electrical interference.
Smoke detectors and alarm system control panels have
specifications for allowable loop resistance. Consult the
control panel manufacturer’s specifications for the total
loop resistance allowed for the particular model control
panel being used before wiring the detector loops.
Wiring Instructions
Wire connections are made by stripping about 1 cm (3/8
"
)
of insulation from the end of the wire (use strip gauge
molded in base), sliding the bare end of the wire under the
clamping plate, and tightening the clamping plate screw.
The zone wiring of the detector bases should be checked
before the detector heads are installed. To make this
possible, this base contains a special spring-type shorting
jumper (shown in Figure 2). After a detector base is
properly wired and mounted to an electrical box, make
sure that the shorting spring is in contact with terminal 3.
Figure 2. Mounting base to box:
A78-1468-01
SHORTING
SPRING
Figure 1. Terminal layout:
A78-1468-03
1
2
3
5
4
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