Ampac FireFinder PLUS - Way Sounder Board

Page 66
12.10 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 10KΩ 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 92: 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 17 for Addressing Details (SW1)