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INTERCONNECTING MULTIPLE SMOKE ALARMS
Interconnected units will only work if they are wired to
compatible units and all requirements are met. This
unit is designed to be compatible with:
BRK Electronics® Smoke Alarm Models 100S,
2002RAC, 4120, 4120B, 4120SB, 4919, 5919,
5919TH, RM3 (Relay Module); BRK Electronics®
Heat Alarm Model HD6135F; and First Alert® Smoke
Alarm Models SA4120B, SA4121B, SA4919B, SA86B,
SA100B.
Interconnected units must meet ALL of the
following requirements:
• A maximum of 18 compatible units may be
interconnected (Maximum of 12 smoke alarms).
• The same fuse or circuit breaker must power all
interconnected units.
• The total length of wire interconnecting the units
should be less than 1000 feet (300 meters). The
interconnect wire should be #18 gauge or larger,
rated at least 300V.
• If an interconnect wire is not already part of your
household wiring, you will need to install one.
This type of wire is commonly available at
Hardware and Electrical Supply stores.
Failure to meet any of the above requirements
could damage the units and cause them to
malfunction, removing your protection.
Interconnected units can provide earlier warning of fire
than stand-alone units, especially if a fire starts in a
remote area of the dwelling. If any unit in the series sens-
es smoke, all units will alarm. To determine which smoke
alarm initiated an alarm, see table:
On Intiating Alarms Red LED(s) flashes(flash) rapidly
On All Other Alarms Red LED is Off
All wiring must conform to all local electrical codes
and Article 760 of NFPA 70 (NEC). Refer to NFPA 72,
NFPA 101, and/or your local building code for further
connection requirements.
AC and AC/DC Smoke Alarms can be intercon-
nected. Under AC power, all units will alarm when
one senses smoke. When power is interrupted,
only the AC/DC units in the series will continue to
send and receive signals. AC powered Smoke
Alarms will not operate.
Interconnect units within a single family residence
only. Otherwise all households will experience
unwanted alarms when you test any unit in the series.