4-Way Sounder Board 7
Man-1170EN Rev.01
Additional Boards Installation Manual
21
Sounder Outputs
•
Utilising Class A wiring 2 sounder circuits are possible.
•
Utilising Class B wiring 4 sounder circuits are possible.
•
The sounder outputs are open and short circuit monitored by fitting a 10K 0.25W resistor across the last
device fitted to the field wiring (Class B).
•
Unused outputs must be terminated with end of line resistor to prevent fault indication.
•
Each output is protected by a 1 Amp, self resetting electronic fuse. A short circuit or overload on one of the
outputs will not prevent the other outputs from operating.
•
All sounder devices used with the board must be polarised. Connecting non-polarised devices to the
circuit will result in a fault indication on the board and at the control panel.
•
Although each of the sounder outputs is fused at 1 Amp, consideration should be given to the rating of the
power supply that is powering the sounder board.
•
The standard power supply for instance has a rating of 5.25 or 10.25 Amps (depending on model) of which
a total of
2.5 Amps should be used for all sounder circuits.
•
When using many sounder outputs or high power sounder outputs, use a separate power supply.
