MDL Datasheet, PDF (3/4 Pages) Systemsensor advanced ideas. – Sync Circuit Module

Controlling Sounder On/Off Over Two 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 circuits 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.
ZONE 1 INPUT
This input powers the MDL Module. This input must have voltage present from the
FACP before anything will work. This also supplies voltage to Zone 1 output.
ZONE 2 INPUT
This input only supplies voltage to Zone 2 output. NOTE: If Zone 1 input is not
powered, the notification devices attached to the Zone 2 output will not be allowed.
HORN CONTROL
This input enables the horns on the SpectrAlert notification appliances. Voltage
present means horns are enabled. No voltage present means horns are disabled.
SLAVE IN Connects to Master MDL Module slave out.
SLAVE OUT Connects to Slave MDL slave in.
Horns Silenced Over Two-Wire Circuit
1) Any mix of SpectrAlert horns/strobes or strobe-only devices is
acceptable.
2) Horn Control connects to interruptible power source.
NOTES:
1) Any mix of SpectrAlert horn/strobe, strobe-
only, or horn-only devices is allowable for
Zone 1.
2) No devices or horn-only are allowed on Zone
2. If no devices are installed on Zone 2,
terminate EOL resistor at horn control
terminal.
MDL and MDLW Sync Modules CS-2456 10/21/04
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