4.9 Brigade / PSU Monitor Board
The Brigade / PSU Monitor Board monitors and controls the power supply, battery charging,
monitored / un-monitored inputs, outputs and the 7 relay outputs.
Providing the Power supply has adequate capacity, monitored Bell/Sounder O/P’s are capable of
driving 2 X 2Amp circuits. Each circuit terminated in a bell/sounder or not, requires a 10KΩ EOL
resistor to give a system normal indication if monitoring is enabled in ConfigManager. If either circuit
is open or shorted, the panel buzzer will sound and a Sounder Fault will be indicated on the Panel.
Monitoring is achieved using a small reverse polarity current. For this reason it is necessary to
ensure that all alarm devices are fitted with a series diode (1N4004 recommended) and correct
polarity is observed for both the output and the sounders they are connected to.
Relay outputs marked NO, C and NC are voltage free relay contacts. Outputs marked +ve and -ve
are fitted with resistors (10KΩ) to allow the circuit to be monitored. If these outputs are un-used they
must be terminated at the terminal block or turned off in ConfigManager.
For all outputs combined, total output current is 2A (if 2A power supply is being used).
Once all the field devices are installed and the wiring has been correctly terminated the FireFinder is
ready to turn on. Turn the Mains power on, and connect the batteries observing correct polarity. The
green power on LED should be illuminated.
OUTPUT RATINGS
Fuse Information
1. All fuses are of the Glass M205 style.
2. F1 is 6.3A
3. Voltage Free contacts are rated at 1A @ 30V
Back EMF Protection
Inductive loads fitted to the Brigade PSU Monitor Board MUST be fitted with
“Flyback” diodes at the load for back EMF protection.
Transient Protection
Recognised transient line protection methodologies at the FACP and the load MUST
be considered when connecting any control devices to the outputs be they in close or remote
to the FACP.
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