Technical Manual
FT420
– Iss 2.4
23
2.5 Optional 8 Zone Expansion Board SUB883
The first 4 Zone Input circuits are included in the Main Control Board SUB880. If more Zone circuits
are required, an 8 Zone Expansion Board SUB883 is added. Each Zone Expansion Board provides 8
x Zone Input circuits.
Each Zone Input can be used either as a:
•
Fire Alarm detection input,
•
Flow Switch input or a
•
Supervised Trigger input for the OWS Automatic Tone Alert function (Alertcom).
The Expansion Board has to be connected to the Main Control Board or another Expansion Board via
ribbon cable. The board address must be selected using the DIP switch SW1 as shown in Table 11.
The board layout is shown in Figure 5.
Figure 5 Zone Expansion Board Layout
The board jumper settings and connections are listed on Table 11 and Table 12 respectively.
Table 11 Zone Expansion Board Jumper Settings
Designator
Description
Jumper Status
Function
Factory Default
JP1
Not used
Out
Not used
Out
SW1
Select expansion board
address. Only one bit can
be turned ON.
1-7
Set one address from 1 to 7.
Based on the system
configurations.
8
Disable the expansion board.
