Honeywell BENDIX/KING KAP 140 - Page 81

BENDIX/KING
KAP 140
Page 4--7
Revision 2, Dec/2002
CS:15574F02.IDU
to the directional gyro. They are capable of supplying 30mA of current. The CRS_DATUM input
(used for heading datum and course datum) is an analog input that can be viewed through the
diagnostic pages.
DIAGNOSTIC NAME
SCALE FACTOR
Course Datum 210 mV/deg
4.3.7 HORIZONTAL SITUATION INDICATOR (HSI) INTERFACE TO THE KC 140
PIN
DESCRIPTION
P1401 -- 2 HDG_DATUM_+
P1401 -- 11 DG_VALID
P1401 -- 27 CRS_HDG_REF
P1402 -- 17 CRS_DATUM_+
If an HSI is used with the KAP 140 autopilot system , four wires interface to the KC 140. They are
the DG_VALID input, HDG_DATUM input, CRS_DATUM input, and CRS_HDG_REF input. The
DG_VALID is a Open/Ground discrete input signal provided by the HSI to inform the KC 140 when
the information being received is valid. The DG_VALID status (Ground = Valid) can be viewed on
the DISCRETE INPUT STRAPS/VALIDS diagnostic page. The HDG_DATUM and CRS_DATUM
inputs are analog inputs that can be viewed through on the ANALOG INPUTS diagnostic page.
DIAGNOSTIC NAME
SCALE FACTOR
Heading Datum 550 mV/deg
Course Datum 210 mV/deg