Landing Gear Discrete Input; Above/Below/Normal Input - Honeywell BENDIX KING KMH 880 System Installation Manual

B B
B B
The normal mechanical failure mode will be the "airborne" condition
3.1.3

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.
3.1.4

Above/Below/Normal Input

This input defines the Altitude Select for the display. Momentary (250 msec.
minimum) application of a "ground" at this input will cause a transistion
between the three states in a cyclical manner ; Normal- Below-Above. The
default mode is "Normal".
J10-71 ABV_BEL_NORM*
Page 3-6
NOTE
NOTE
NOTE
10609I00.ZIPCDL
KMH 880/KTA 870
Rev 0, October/2000