Ampac FireFinder Series II AS442 Specifications Page 52

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Page 47
FIREFINDER SERIES II INSTALLATION, COMMISSIONING &
OPERATION
11.11 8 Way Sounder Monitor Board (302-7420/1)
The 8 way Sounder Monitor Board allow a larger number of bells and sounders to be connected to
the System.
The 302-742 is built in two versions:
1. 302-7420: All outputs are monitored and provide 1 Amp per circuit.
2. 302-7421: The first 4 circuits are Voltage free contacts, the second 4 are as per the 302-
7420.
Wiring to the Monitored sounder outputs is as per the 302-6730.
The Sounder/ Bell monitor board connects to the serial peripheral interface (SPI) bus. This is the
same bus that connects to the Brigade Output Board and a maximum of 8 boards can be daisy
chained together.
Note: Output current is dependent on the capacity of the Power Supply
= Shaded Components are Not Fitted to 302-7421
Sounder Monitor Brd. Volt-Free but are Fitted to the 302-7420
10K EOL
10K EOL
10K EOL
This area will be
marked with the
correct Version
Number
RL7
TB5
C27
X1
U9
U7
U4
U3
U2
TB4
TB3
TB2
TB7
TB6
R40
R39
R38
R37
R36 R35
R34
R33
R32
R31 R30 R29
R23 R22
R21
R20
R13
R12
R11
R10
D35
D34
D33
D32
D31
D30
D29
D28
D1
C26 C25
C24
C5
C4
D5
D4 D3 D2
D9
D7
D6
RL6
RL1
RL2
RL4
D8
RL5
TB1
RL3
RL8
U1
302-742
NO+NC-
C
NO+NC-
C
NO+NC-
C
NO+NC-
C+VE-VE+VE-VE+VE-VE
+VE-VE
0V
+27V
AT90S8535-8JC
OUT
IN
1A
1A
1A
1A
1A
1A
1A
1A
LK2
LK1
D10
NORMAL
Note:
If the O/P was configured
as a monitored O/P, as
below, NO is the +ve leg
while NC is the -ve leg.
10K EOL
To CN7 of the
Main Controller
To IN (CN1) of next
Sounder Monitor Board
or Output Brigade Board
CN5
To the AUX Power
O/P TB2 of the O/P
Brigade Board
EOL Resistors are not required
if the O/P is configured for Volt
Free Contacts NO, NC, & C
All Fuses are 1A M205 Style
10K EOL
CN1
CN2
F2
F1
F3
F4
F5
F6
F7
F8
R28
R27 R26 R25
R19
R18
R17
R16
R9
R8 R7
R6
C23
C22 C21 C20
Figure 67: Sounder / Bell Controller Board
Note: Output current is dependent on the capacity of the Power Supply
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