compartment and interfaces with the standard control electronic
amplifier (SCEA) and the OFSA.
Built-in test equipment (BITE) is
incorporated in the crew AFES and automatically monitors the status
of the crew AFES components.
BITE also allows for testing of
components for normal operation.
The red-guarded, two-position,
MANUAL DISCHARGE toggle switch allows for manual discharge of crew
compartment fire extinguishers (see Figure 6).
Figure 6.
Crew AFES Test and Alarm Panel.
o
Optical Fire Sensing Assembly. The OFSA is made up of four sensor
units located in the crew compartment.
Each of the sensors use
three infrared (IR) wavebands to detect hydrocarbon fuel fires.
OFSA is designed to prevent detection of sunlight, electrical
discharges, lamps or flashes, fragmentation or radiation from
warheads, or other activities associated with the battlefield
environment.
Built-in test equipment is also incorporated in the
OFSA units. BITE gives an indication of a fault by lighting a light
emitting diode (LED) on the T/A panel. The four OFSA units provide
coverage of the entire crew compartment (see Figure 7).
o
Standard Control Electronic Amplifier. The SCEA is used to process
input signals received from the OFSA when a
8
OD1700
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