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16
•
A maximum of 24 Kidde Safety devices may be interconnected in a multiple station arrangement. The intercon-
nect system should not exceed the NFPA interconnect limit of 12 smoke alarms and/or 18 alarms total (smoke, CO,
Smoke/ CO Combination, heat, etc.). With 18 alarms interconnected, it is still possible to interconnect up to a total
of 6 remote signaling devices and /or relay modules (see below for details on interconnecting Kidde devices)
•
Figure 9-A illustrates interconnection wiring. Improper connection will result in damage to the alarm, failure to
operate, or a shock hazard.
•
Make certain alarms are wired to a continuous (non-switched) power line.
nOte:
Use standard UL Listed household wire (as required by local codes) available at all electrical supply
stores and most hardware stores.
Figure 9-A, Interconnect Wiring Diagram
Wires on alarm harness: Connected to:
Black: Hot side of AC line
White: Neutral side of AC line
Red: Interconnect lines (red wires) of other
units in the multiple station set-up
Additional
Alarm
RED
BLACK
WHITE
Additional
Alarm
RED
BLACK
WHITE
FUSE OR CIRCUIT BREAKER
RED
BLACK
WHITE
Kidde Relay Module
SM120X, CO120X
or both
Optional
Accessory
First
Alarm