10 Zone LED Alarm Panel - Engineering Manual
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Only one 16 ohms extension speaker may be wired across the speaker terminals. Mounted in
convenient positions within the installation the extension speakers will reproduce all of the alarm
tones generated by the control panel.
A control marked VOLUME in the center of the board may be used to adjust the low volume
entry/exit tones to suit environmental conditions.
2.10 - External siren Output (Bell box)
The external siren (bell box) is usually installed in a high position from where the siren could be
seen and heard.
Terminal + S- RTN- - are for connection to the external siren. These terminals provide a
power/hold –off supply, sounder trigger and tamper circuit to protect the external siren housing.
The terminals are summarized as follows:
+ +Ve supply (13V)
S- -Ve Sounder trigger
RTN- -Ve tamper return
- -Ve supply (0)
Strobe - and strobe +
Where a discrete external siren is used, it should be connected to terminals + & S-. Terminals
RTN- & - are then used for tamper protection for the housing.
Bell box wiring to control panel
Bellbox
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