BENDIX/KING
KAP 140
Page 4--16
Revision 2, Dec/2002
CS:15574F02.IDU
4.3.19 KC 140 AIRCRAFT STRAPS
PIN
DESCRIPTION
P1401 -- 17 STRAP_5
P1401 -- 31 STRAP_1
P1401 -- 32 STRAP_2
P1401 -- 33 STRAP_3
P1401 -- 34 STRAP_4
P1401 -- 36 STRAP_6
The above inputs are Open/Ground discrete inputs. For each aircraft certification, the KAP 140
Autopilot System uses a different combination of inputs tied to ground and inputs left open. The
strap “code” in the harness determines which certification file(s) can be downloaded to the
configuration module. If the strap information contained in the certification file does not agree with
the strap configuration in the harness, an error code is generated and autopilot operation is
disallowed.
NOTE
All open/ground discrete inputs to the KC 140 FCC have the
following characteristics. The KC 140 will register an input as being
“grounded” that measures less than 1.5V at the connector of the KC
140. The KC 140 will register an input as being “open” if the voltage
at the connector of the KC 140 is > 10V or if the impedance to ground
of that signal is > 15Kohms. (This assumes 28V on the aircraft power
bus.)
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