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Table 11 Gas Front Status LED Indication and flash Pattern
Type
Alarm
Fault
Disable
4.7
FT128 External Termination
The FT128 Main Board 4556 is normally mounted on the rear of the front door. In order to
avoid the field wiring termination on a swing door, an adapter board SUB836
connected to the main board. The new version of the adapter board is plugged in the screw
terminals of the 4556 board and interfaced to another external termination board SUB835
mounted on the equipment plate. The adapter board SUB836 is connected to the
termination board SUB835 via ribbon cable.
The FT128 has only one programmable relay. To increase the number of programmable
relays in the standard FT128 system, another relay with two changeover contacts is added
to the termination board to provide 2 sets of additional changeover relay contacts. The
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The adapter board shown in Figure 9 and external termination board shown in Figure 10 use a new PCB revision (PCB250
Rev 5). In all previous revisions, the adapter board is soldered in the terminals of FT128 main board (4556).
Gas Extinguishing
1st Alarm
2nd Alarm -Timer Running
Gas Initiated
Gas Discharged
Gas Externally Released
Gas Discharge Inhibited
Gas Fault
Gas Disabled
Figure 8 Gas Extinguishing Display Layout
LED Name
1st Alarm - Red
2nd Alarm – Red,
Timer Running
Gas Initiated - Red
Gas Externally
Released - Red
Gas Discharged - Blue
Gas Fault - Yellow
Gas Discharge
Inhibited - Yellow
Gas Discharge
Disabled - Yellow
Service Switch Active-
Yellow
Service, Master Abort
Service
Master Abort
Module Conditions
One zone or zone address in alarm
Both zones or zone addresses in
alarm
Gas release output activated
External gas release control
activated
Gas discharged sensor input
activated
Fault in any of the supervised
inputs or outputs
Gas discharge inhibited via LCS
isolate switch
Gas discharge disabled by the
service master abort switch or the
gas lock-off valve controls
Illuminates when the master abort
switch is activated
Gas service master abort switch
26
Operation Manual
FT128 Rev 2.4
LED
Pattern
Fast Flash
Steady ON
Steady ON
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