spindown of engine/fan(s) as a result of ignition switch-off or shutdown by FPX103C as a result of an
alarm (from either detectors or manual operate switch). With the ignition off the unit enters low power
mode and the ON LED will flash to conserve power. Single flash shows the spindown timer is still
counting (fans still turning), then adopts a double flash “heartbeat” indicating that “parked mode” is
active and extinguisher operation will be immediate on double alarm or manual operate.In “parked
mode” (ignition off for longer than spindown delay) then the fuel solenoid will operate on first alarm and
extinguisher immediately on second alarm.
Switching on the ignition even for a short time will restart the spindown timer and it is also active on
initial power-on.
Spindown timer is selectable: NoAUTO, IMMEDIATE, 5 to 30 seconds, 5 sec granularity.
A fault in one detector loop will cause the auto mode to fail (because of the double knock logic)
however a manufacturing option can allow PARKED mode to auto operate the extinguisher after single
loop alarm if the other loop is faulty.
Manual operate command must also wait for the engine/fan spindown before extinguisher activation.
After 125ms filter time the unit will confirm activation request by flashing 2ALARM=AUTO LED and
internal beeper, fan and fuel solenoid shutdown relays are activated immediately. After spindown
timeout the extinguisher will operate and beeper will go continuous.
PANEL LED INDICATIONS:
The panel layout has two distinct areas for extinguisher and detector status with separate LED flash
pattern indications for each detection loop (1 and 2).
Power On (Green LED)
Detector Alarm (Red LED) - inverse flash pattern indicating affected loop
Detector Loop Fault (Red AMBER) - inverse flash pattern indicating affected loop
2 Alarms=Auto Active (Red LED)
Extinguisher Fault (Red AMBER)
Internal sounder will operate on anything that requires user attention (alarm or fault).
CONTROLS:
Extinguisher manual operate button (behind tamper evidence tag)
Auto mode time delay selector DIP switch on panel rear (delay = binary_value * 5 seconds).
SW1-3 off-off-off = immediate, on-on-on = AutoDisabled, on-off-off=5sec, off-on-off=10sec, etc.
SW4 on = vfc operates on single alarm, off = vfc operates on double alarm
CONNECTIONS:
BLOCK 1 (6 way)
GND
External Alarm Output (Power via 2A N.O. relay contact)
GND
Ignition input (sets auto PARKED mode when off)
Power (11-32vdc via 4A fuse)
GND
BLOCK 2 (6 way)
BLOCK 3 (6 way)
Detector Loop1A
FirexA
Detector Loop1B
FirexB
Detector Loop2A
GND
Detector Loop2B
VFC (2Amps Max)
GND
NO VFC (2Amps Max) COM
Aux input
VFC (2Amps Max) NC
