D450-10-00
2
I56-530-03
Base Terminals
No.
Function
1
Remote Annunciator (+)
2
Test Coil (+)
3
Not used
4
Remote Annunciator (-)
5
RTC (-)
6
N.O.
Supervisory Relay
7
N.O
Form A Contacts
8
N.O.
Alarm Relay
9
N.O.
Form A
10
C.
Initiation
11
C.
Contacts
12
N.O.
Alarm Relay
13
N.C.
Form C
14
C.
Auxiliary Contacts
SNAP ON
DECORATIVE
RING
SCREWS (NOT
SUPPLIED)
DETECTOR
BASE
BOX (NOT
SUPPLIED)
SHORTING
SPRING
A78-1175-01
Figure 2. Mounting Base to Box
Mounting
The detector base mounts directly to 4-inch octagon boxes
and 4-inch square boxes. To mount the base, remove the
decorative ring by rotating it in either direction to unhook
the snaps before separating the ring from the base. Use the
screws supplied with the junction box to attach the base to
the box through the appropriate mounting slots in the base.
Position the decorative ring around the base and rotate
it in either direction until the ring snaps into place (see
Figure 2).
Installation Guidelines
All wiring must be installed in compliance with the Na-
tional Electrical Code, all applicable local codes, and any
special requirements of the authority having jurisdiction,
using the proper wire size. The conductors used to connect
smoke detectors to control panels and accessory devices
should be color-coded to reduce the likelihood of wiring er-
rors. Improper connections can prevent a system from re-
sponding properly in the event of a fire.
For signal wiring (the wiring between interconnected
detectors), it is recommended that the wire be no
smaller than 16 gauge (1.5 square mm), and that two-
or three-conductor wire be no smaller than 18 gauge
(1.0 square mm). For best performance, alarm loop con-
ductors should be installed in separate grounded con-
duit or shielded cable to protect the alarm loop from
extraneous electrical interference.
Smoke detectors and alarm systems 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.
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Figure 1. Base Terminals
