System Sensor MDL and MDLW - Manual (Page 2)

Figure 1: Single MDL Using Sync Error (for panels
with the capability to check for sync error)
NOTE: If zone 1 output of module is connected to strobes,
chime/strobes or horn/strobes, zone 1 input supply power
must be continuous for proper operation.
TEMP. JUMPER OFF
NAC2
NAC1
FACP
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
HORN
CONTROL
ZONE 1
OUT
ZONE 1
IN
ZONE 2
IN
SLAVE
IN
ZONE 2
OUT
SYNC
ERROR
SLAVE
OUT
SEPARATE
MONITORING
INPUT
EOL
A0262-00
Figure 2:
NOTE: If zone 1 output of module is connected to strobes,
chime/strobes or horn/strobes, zone 1 input supply power
must be continuous for proper operation.
TO NEXT
SPECTRALERT
DEVICE OR
EOL
NAC3
NAC2
MASTER MODULE
SLAVE MODULE
NAC1
TO NEXT
SPECTRALERT
DEVICE OR
EOL
All SpectrAlert horns,
horn/strobes, and strobes
will operate in sync.
NAC2
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
HORNS SILENCED OVER TWO WIRE CIRCUIT
MASTER MODULE HORN CONTROL CONNECTS
TO INTERRUPTABLE POWER SOURCE
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
HORN
CONTROL
ZONE 1
OUT
ZONE 1
IN
ZONE 2
IN
SLAVE
IN
ZONE 2
OUT
SYNC
ERROR
SLAVE
OUT
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
HORN
CONTROL
TEMP JUMPER OFF
ZONE 1
OUT
ZONE 1
IN
ZONE 2
IN
SLAVE
IN
ZONE 2
OUT
SYNC
ERROR
SLAVE
OUT
TEMP JUMPER OFF
FACP #1
FACP #2
TO NEXT
SPECTRALERT
DEVICE OR
EOL
TO NEXT
SPECTRALERT
DEVICE OR
EOL
NAC1
(+)
(–)
EOL
A0182-00
D900-14-00 2 I56-0983-015R
Synchronize SpectrAlert Horns, Chimes 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 syn-
chronized to all other modules by interconnecting the
“slave” input and output terminals between modules.
CAUTION
Horn control wiring must be contained within common en-
closure of module.
CAUTION
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.
CAUTION
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 Mod-
ule Horn Control
• Connect the current source to the horn or chime 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 or chime
control circuits can be wired in parallel. If wired in par-
allel and a zone output is used from panel, use an EOL
on the last module for supervision.
CAUTION
Horn/chime control wiring must be contained within com-
mon enclosure of module.
CAUTION
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.
CAUTION
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 synchro-
nizing 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.