• A maximum of 24 Kidde Safety devices may be
interconnected in a multiple station arrangement. The
interconnect system should not exceed the NFPA interconnect
limit of 12 smoke alarms and/or 18 alarms total (smoke, CO,
Smoke/ CO Combination, heat, etc.). This Smoke/CO
combination alarm must be counted as a smoke alarm when
determining the number of units on an interconnect line.
With 18 alarms interconnected, it is still possible to
interconnect up to a total of 6 remote signaling devices
and/or relay modules (see page 16 for details on
interconnecting Kidde devices).
• The maximum wire run distance between the first and last
unit in an interconnected system is 305 m (1000’).
• Figure 2 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 CSA Listed household wire (as
required by local codes) available at all electrical
supply stores and most hardware stores
.
13
FUSE OR CIRCUIT BREAKER
RED
BLACK
WHITE
CONNECTOR
RED
BLACK
WHITE
CONNECTOR
First
Alarm
Additional
Alarm
Kidde
Relay Module
SM120X
Additional
Alarm
Optional
Accessory
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
Interconnect Wiring Diagram
Installation Instructions
FIGURE 2