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Synchronize SpectrAlert Horns and Strobes
• Each module can power two 3-amp circuits wired in
class B or one 3-amp circuit powered as Class A.
• Each module will synchronize 2 zones.
• Additional modules can be added and may be synchro-
nized to all other modules by interconnecting the
"slave" input and output terminals between modules.
Horn control wiring must be contained within common en-
closure of module.
Slave Out – Slave In wiring must be contained within either
the common enclosure of modules or enclosures within 20
feet of each other with wiring inside conduit.
If Zone 1 input is not powered or fails during alarm, the
notification devices attached to the Zone 2 output will not
be powered.
Controlling Sounder On/Off Over 2-Wires Using
Module Horn Control
• Connect the current source to the horn control input. If a
zone output is used for the source, you must use an EOL
on the horn control input terminal.
• When multiple modules are used, the horn control cir-
cuits can be wired in parallel. If wired in parallel and a
zone output is used from panel, use an EOL on the last
module for supervision.
Horn control wiring must be contained within common en-
closure of module.
Slave Out – Slave In wiring must be contained within either
the common enclosure of modules or enclosures within 20
feet of each other with wiring inside conduit.
If Zone 1 input is not powered or fails during alarm, the
notification devices attached to the Zone 2 output will not
be powered.
Special Considerations
A latching Relay contact is provided in case the synchroniz-
ing signal to the notification devices is interrupted. The
output can be wired so that a trouble signal will be annun-
ciated at the panel. If the synchronization pulse fails in the
MDL module, the strobes will shut off.
D900-14-00
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
Figure 1:
NOTE: If zone 1 output of module is connected to strobes
or horn/strobes, zone 1 input supply power must
be continuous for proper operation.
MASTER MODULE
}
(+)
(–)
FACP
}
(+)
NAC1
(–)
}
(+)
NAC2
(–)
}
(+)
(–)
}
(+)
(–)
}
)
( +
(+)
NAC3 OUT
(–)
)
( –
STYLE Z
(CLASS A)
}
)
( +
(+)
NAC4 RETURN
(–)
)
( –
}
(+)
(–)
NOTE: Class A configuration requires special panel. Consult with panel manufacturer.
Figure 2:
NOTE: If zone 1 output of module is connected to strobes
or horn/strobes, zone 1 input supply power must
be continuous for proper operation.
HORNS SILENCED OVER TWO WIRE CIRCUIT
MASTER MODULE HORN CONTROL CONNECTS
TO INTERRUPTABLE POWER SOURCE
MASTER MODULE
FACP #1
}
HORN
(+)
EOL
(+)
(–)
CONTROL
NAC1
(–)
}
(+)
ZONE 1
(+)
(–)
IN
NAC2
(–)
}
(+)
ZONE 2
(+)
NAC3
(–)
IN
(–)
}
SLAVE
(+)
(–)
IN
TEMP JUMPER OFF
SLAVE MODULE
FACP #2
}
HORN
)
( +
)
( –
CONTROL
}
(+)
ZONE 1
(+)
NAC1
(–)
IN
(–)
}
(+)
ZONE 2
(+)
NAC2
(–)
IN
(–)
}
SLAVE
(+)
(–)
IN
TEMP JUMPER OFF
2
}
)
( +
HORN
ZONE 1
(+)
CONTROL
OUT
(–)
DEVICE OR
}
ZONE 1
ZONE 2
)
( +
IN
OUT
)
( –
)
( –
)
( +
}
ZONE 2
SYNC
)
( +
IN
ERROR
)
( –
DEVICE OR
}
SLAVE
SLAVE
)
( +
)
( –
OUT
)
( –
IN
All SpectrAlert horns,
horn/strobes, and strobe
Temp. Jumper Off
only devices will
operate in sync.
SLAVE MODULE
}
)
( +
HORN
ZONE 1
(+)
CONTROL
OUT
(–)
DEVICE OR
}
ZONE 1
ZONE 2
)
( +
IN
)
( –
OUT
)
( –
1 STYLE Z (CLASS A)
}
)
( +
ZONE 2
SYNC
)
( +
IN
ERROR
)
( –
DEVICE OR
}
SLAVE
SLAVE
)
( +
OUT
)
( –
IN
)
( –
Temp. Jumper Off
}
ZONE 1
)
( +
)
( –
OUT
}
ZONE 2
)
( +
OUT
)
( –
}
SYNC
)
( +
)
( –
ERROR
}
SLAVE
)
( +
)
( –
OUT
}
ZONE 1
)
( +
)
( –
OUT
}
ZONE 2
)
( +
OUT
)
( –
}
SYNC
)
( +
)
( –
ERROR
}
SLAVE
)
( +
OUT
)
( –
All SpectrAlert horns,
horn/strobes, and strobes
will operate in sync.
TO NEXT
EOL
2 STYLE Y (CLASS B)
TO NEXT
EOL
TO NEXT
EOL
TO NEXT
EOL
TO NEXT
SPECTRALERT
DEVICE OR
EOL
TO NEXT
SPECTRALERT
DEVICE OR
EOL
TO NEXT
SPECTRALERT
DEVICE OR
EOL
TO NEXT
SPECTRALERT
DEVICE OR
EOL
I56-0983-008
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