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• A maximum of 24 Kidde and/or FireX devices may be interconnected in a mul-
tiple station arrangement. The interconnect system should not exceed the
NFPA interconnect limit of 12 smoke alarms and/or 18 alarms total (smoke,
heat, carbon monoxide, etc.). With 18 alarms interconnected, it is still possi-
ble to interconnect up to a total of 6 remote signaling devices and/or relay
modules.
• When mixing models which have battery backup (i12040, i12060, i12080,
i4618, 1275, 1276, 1285, 1296, PE120, PI2000, KN-COSM-IB, RF-SM-ACDC,
HD135F, KN-COB-IC, KN-COP-IC) with models without battery backup, (i1220,
1235, KN-COSM-I, KN-COB-ICB, KN-COP-ICB, 120X, SM120X,CO120X,
SL177i) be advised that the models without battery backup will not respond
during an AC power failure.
• For more information about compatible interconnect units and their function-
ality in an interconnect system, visit our web site at: www.Kidde.com
• The maximum wire run distance between the first and last unit in an intercon-
nected system is 1000 feet.
• Figure 5 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) avail-
able at all electrical supply stores and most hardware stores.
FIGURE 5 INTERCONNECT WIRING DIAGRAM
WIRES ON ALARM HARNESS CONNECTED TO
Black Hot Side of A.C. Line
White Neutral Side of A.C. Line
Red Interconnect Lines (Red Wires) of Other
Units in the Multiple Station Set up
FUSE OR CIRCUIT BREAKER
REDBLACK
WHITE
CONNECTOR
First
Alarm
Additional
Alarm
Kidde
Relay Module
SM120X
Optional Accessory
BLACK
WHITE
RED
CONNECTOR
Additional
Alarm
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