Ampac SP Series, Installation, Commissioning & Operation

Page: 34 / 112

FireFinder
™
Installation Commissioning & Operation
Page 28
6.8 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
FireFinder
™ 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
Figure 39: Sounder / Bell Controller Board 302-742x
= 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
C2
7
X1
U9
U7
U4 U3
U2
TB4
TB3
TB2
TB7
TB6
R4
0
R3
9
R3
8
R3
7
R3
6
R3
5
R3
4
R3
3
R3
2
R3
1
R3
0
R2
9
R2
3
R2
2
R2
1
R2
0
R13
R12
R11
R10
D35
D34
D33
D32
D31
D30
D29
D28
D1
C2
6
C2
5
C2
4
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
+V
E
-V
E
+V
E
-V
E
+V
E
-V
E
+V
E
-V
E
0 V +27V
A
T
9
0
S
8
535-
8J
C
O UT I N
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.
10
K
E
O
L
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
10
K
E
O
L
CN1 CN2
F 2
F1
F3
F4
F5
F6
F7
F 8
R2
8
R2
7
R2
6
R2
5
R1
9
R1
8
R1
7
R1
6
R9
R8
R7
R6
C2
3
C2
2
C2
1
C2
0