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B
3.1.3
Air/Ground Discrete Input
The Air/Ground Discrete, if used, is wired to a logic source in the aircraft that
presents a standard "open" circuit while the aircraft is airborne and a standard
"ground" when the aircraft is on the ground. The Air/Ground Discrete is filtered
to allow takeoff and landings. The discrete will remain in the same state for 10
seconds before changing states.
AIRBORNE = >100Kohms , or +18.5 to +36 VDC.
ON GROUND = < 10 ohms, or 0 to +3.5 VDC.
J10-4 Air_Gnd*
The normal mechanical failure mode will be the "airborne" condition
3.1.4
Landing Gear Discrete Input
The Landing Gear Discrete, if used, will present a standard "open" circuit when
the gear is retracted and a standard ground when the gear is extended.
RETRACTED = > 100Kohms to airframe DC GND or +18.5 to +36 VDC.
EXTENDED = <10 ohms to airframe DC GND or 0 to +3.5 VDC
J10-3 Landing_gear*.
Aircraft with fixed landing gear must be equipped with a bottom monopole
antenna. Furthermore, the landing gear discrete must be strapped to the
retracted position.
The normal mechanical failure mode is the "retracted" condition.
Rev 3, August/2002
NOTE
NOTE
NOTE
10609I03.CDL
KMH 880/KTA 870
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