FireFinder
™
Installation Commissioning & Operation
Page 25
6.3
16 Way Input Board 302 - 6770
Opto-Inputs:
Up to 16 inputs can be connected to the 16 Way Input Board. These inputs are required to
be voltage free contacts as shown below.
Figure 30: 16 Way Input Board (302-6770)
6.4
Serial Relay Board 302 - 7320
Relay Outputs:
Each Serial Relay Board 302-7320 communicates with the Main Controller via the Serial
Bus and is fitted with eight 1A relays with voltage free contacts. A maximum of 16 boards can be daisy
chained together per Controller.
Figure 31: Serial Relay Board (302-7320)
Note: These boards are not monitored so should not be used for brigade calling or with occupant
warning systems
1 2
COM COM
3 4 5 6 7
8 9 10 1112 13 14 15 16
CN1
TB2
TB3
TB4
TB5
TB6
U4
U1
U2
U5
U7
U8
U9
U10
U11
U12
U13
U14
U15
U16
U6
U3
TB1
302-
677
0
AS AN EXAMPLE
INPUTS 1 AND 16 CONNECTED TO
VOLTAGE-FREE CONTACTS
TO CN3 OF
302-6720
N/0
C
N/C
O/P 1
N/0
C
O/P 2
N/C
N/0
C
O/P 3
N/C
N/0
C
O/P 4
N/C
N/0
C
O/P 5
N/C
N/0
C
O/P 6
N/C
N/0
C
O/P 7
N/C
N/0
C
O/P 8
N/C
302-7320
CN 2
U5
U7
U6
CN 1
C N4
RL1
TB2
TB1
RL8
RL7
RL6
RL5
RL4
RL3
RL2
U1
C N3
Cabled to
CN3 of
302-674 or
CN2 of
Previous
Serial Board
Cabled to CN1
(IN) of next
Serial Board
To 27VDC Regulated Output of Brigade / PSU Monitor Board
10 Way Ribbon
O U T
I N
Summary of Contents for SP Series
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