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INSTALLATION & COMMISSIONING MANUAL - REVISION 1.0 - 19.FEB.2007
INSTALLATION
Conventional Sounders is the term used to describe conventional alarm sounders (or bells) connected
directly to a Panel.
Loop-powered Sounders are different and are connected to the Analogue Loop.
Two Conventional Sounder circuits are provided on the Panel. More than one Conventional Sounder
may be connected to each circuit. Max. Current rating/Output is 500 mA b@ 27.5 V DC nominal.
All Conventional Sounder circuits are monitored for open and short circuit faults. If a Conventional
Sounder output is not used, then a 10K resistor must be connected across its output terminals.
Conventional Sounders
Conventional
Sounders
Auxiliary Fire Relays (2) and Fault Relay (1)
Two auxiliary fire relay outputs are provided on the JUNIOR Main board. These outputs are activated when a fire is
detected (unless specifically inhibited). They are labeled AUX1 and AUX2. Under the presence of any Fire Alarm
condition, these 2 relays will be energized. Both set of contacts are of the change-over type. Max. Contact current
rating for each set of relay contacts is 1 Amp @ 50 V AC/DC resistive.
One auxiliary fault relay output is also provided. This relay output will remain closed while there are no faults
present in the system. Under any fault condition present, the relay will be deenergized and the relay contact will be
open. The Fault relay is NC, will open on any fault on the system.
The contact ratings are : 1A, 50V AC/DC (min 100mA, 6V)
WARNING: The total current load of all detection loops, sounder circuits and auxiliary
supply outputs should not exceed the maximum power rating of the panel. Please refer to
the technical specification tables. .
Auxiliary Fire
Relay Outputs
Auxiliary
Fault
Relay
Output
WARNING: Relay outputs are not supervised. Please ensure that any wiring connected to
these outputs is power limited.
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