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Ampac FireFinder PLUS Specifications Page 71

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Page 65
FIREFINDER PLUS
(
AUST
)
INSTALLATION
,
COMMISSIONING OPERATION
12.9 8 Way Sounder Board
The Sounder Board (BRD25SOP) expands the number of sounders that can be used on an FACP by
8. Each output is of a solid state design, rated at 24VDC / 750mA and requires a 10K End of Line
(EOL) resistor regardless of whether or not a sounder is wired to the circuit.
The sounder board will switch ON the sounders as configured (output off, continuous or pulsed) at the
FACP and supervise the sounders for their open circuit, short circuit & line fault conditions.
Note 1: Sounder polarity MUST be observed.
TB3
TB2
TB1
SW1
-VE
+VE
SOUNDER 1
-VE+VE
SOUNDER 2
-VE
+VE
SOUNDER 3
-VE
+VE
SOUNDER 4
-VE+VE
SOUNDER 5
-VE+VE
SOUNDER 6
-VE
+VE
SOUNDER 7
-VE
+VE
SOUNDER 8
DC IN
0V
27V
Fit EOL Termination
Link 1 if Last Module
on Comms Bus
Address SW
(See Note)
POWER
CN2
CN1
To Sounders 1 to 4 + / -
To Sounders 5 to 8 + / -
1 2 3 4
ON
TB2
TB1
-VE
+VE
SOUNDER 1
-VE+VE
SOUNDER 2
-VE
+VE
SOUNDER 3
-VE
+VE
SOUNDER 4
-VE+VE
SOUNDER 5
-VE+VE
SOUNDER 6
-VE
+VE
SOUNDER 7
-VE
+VE
SOUNDER 8
To Sounders 1 to 4 + / -
To Sounders 5 to 8 + / -
RS485 Control
Comms In
ON
27VDC Out
CN3
CN4
+
-
TB3
DC IN
0V
27V
POWER
27V
- +
10K EOL
Resistor
27VDC In
RS485 Control
Comms Out
EOL
EOL
EOL
EOL
EOL
EOL
EOL
Figure 89: 8 Way Sounder Board Front View showing connectors and Address Switch
Note 2: Maximum Current per Output: 750mA.
Note 3: A +27VDC external power supply feed is required
Note 4: In addition filtering and protection devices are used to reject transients.
Connections
Terminal/s Function
TB1 to 2
+ve
-Ve
Sounder 1 to 8
TB3
0V
27V
Power DC IN
Note 5: See Section 18 for Addressing Details (SW1)
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