Honeywell BENDIX/KING KAP 140 Maintenance Manual page 84

4.3.10 ENCODING ALTIMETER INTERFACE TO THE KC 140
PIN
P1402 -- 3
P1402 -- 5
P1402 -- 11
P1402 -- 13
P1402 -- 14
P1402 -- 16
P1402 -- 20
P1402 -- 21
P1402 -- 29
P1402 -- 33
P1402 -- 34
P1402 -- 36
The BARO_SET input from the encoding altimeter is supplied by a potentiometer connected to
the BARO_REF_SUPPLY output from the FCC. The value of the BARO_SET and
BARO_REF_SUPPLY can be viewed on the ANALOG VOLTAGE INPUTS diagnostic page. The
BARO_REF_SUPPLY voltage should be approximately 4 V. It can provide a maximum of 50mA
load current to the encoding altimeter.
DIAGNOSTIC NAME
BARO_SET
BARO_SUPPLY_VOLTAGE
D4 (MSB), A1, A2, A4, B1, B2, B4, C1, C2, and C4 (LSB) are the encoding altimeter gray scale
(Gillham) code representation of the current pressure reading. These inputs are displayed on the
DISCRETE INPUT STATUS diagnostic screen in hex notation, along with their equivalent altitude.
Revision 2, Dec/2002
CS:15574F02.IDU
BENDIX/KING
KAP 140
DESCRIPTION
C2
C4
A1
A2
A4
BARO_SET
B4
C1
D4
B1
B2
BARO_REF_SUPPLY
SCALE FACTOR
1 V/V
1 V/V
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