Honeywell MK VI User Manual
Page 266
Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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Table 5.3.13-7: Input/Output Discrete Type 7
CONN PIN #
CHANNEL
DESIGNATION
REFERENCE
PIN TYPE
PIN FUNCTION
Ref
Polarity/Configuration
J1-38
28V_DISC_02
Input
+28V Glideslope Inhibit Discrete
6.6.12
>+17V = Inhibit
<+4.4V = Not Inhibit
J1-19
GND_DISC_02
Input
GND Glideslope Inhibit Discrete
6.6.11
Gnd = Inhibit
J1-37
28V_DISC_03
Input
+28V Landing Flaps Discrete
6.6.5
>+17V = Flaps Up
<+4.4V = Not Flaps Up
J1-18
GND_DISC_03
Input
GND Landing Flaps Discrete
6.6.4
Gnd = Flaps Up
J1-36
28V_DISC_04
Input
+28V Audio Inhibit Discrete
6.6.17
>+17V = Inhibit
<+4.4V = Not Inhibit
J1-17
GND_DISC_04
Input
GND Audio Inhibit Discrete
6.6.16
Gnd = Inhibit
J1-35
28V_DISC_05
Input
+28V Landing Gear Discrete
6.6.3
>+17V = Gear Down
<+4.4V = Gear Up
J1-16
GND_DISC_05
Input
GND Landing Gear Discrete
6.6.2
Gnd = Gear Down
J1-15
GND_DISC_06
Input
Glideslope Cancel Discrete (Note 1,4)
6.6.13
Gnd = Cancel Toggle
J1-14
GND_DISC_07
Input
Momentary Flap Override Discrete (Note 1,4)
6.6.6
Gnd = Flap Override Toggle
J1-13
GND_DISC_08
Input
Mode 6 Low Volume Discrete
6.6.15
Gnd = Low Volume
J1-8
28V_DISC_09
Input
Autopilot Engaged Discrete #1
6.6.21
>+17V = Engaged
<+4.4V = Not Engaged
J1-12
GND_DISC_09
Input
Terrain Awareness & TCF Inhibit Discrete (Note 2,4) 6.6.20
Gnd = Inhibit
J1-34
GND_DISC_10
Input
Self-Test Discrete (Note 1,4)
6.6.7
Gnd = Self-Test Toggle
J1-67
GND_DISC_14
Input
GPWS Inhibit Discrete
6.6.27
Gnd = Inhibit
J2-31
GND_DISC_15
Input
Steep Approach Discrete #2 (Note 1,4)
(momentary)
6.6.25
Gnd = Toggle on/off
J1-72
MON_OUT_1
Output
GPWS INOP Discrete
7.4.3
J1-55
MON_OUT_2
Output
TAD INOP Discrete
Terrain Not Available
7.4.3
J1-78
DISC_OUT_1
Output
GPWS Warning Discrete
Terrain Awareness Warning
Obstacle Awareness Warning
7.4.1
7.4.7.2
J1-77
DISC_OUT_2
Output
GPWS Alert Discrete
Terrain Awareness Caution
Obstacle Awareness Caution
7.4.1
7.4.7.1
J1-76
DISC_OUT_3
Output
Glideslope Cancel Discrete
7.4.6
J1-73
DISC_OUT_4
Output
Flap Override Discrete
7.4.5
J1-69
DISC_OUT_5
Output
Audio On Discrete
7.4.2
J1-54
DISC_OUT_6
Output
Terrain Display Select #1 Discrete
7.4.4
J1-51
DISC_OUT_8
Output
Terrain Awareness Caution or Warning
Obstacle Awareness Caution or Warning
7.4.7.3
Gnd = Terrain Pop Up
J1-49
DISC_OUT_9
Output
Terrain Display Select #2 Discrete
7.4.4
J1-52
DISC_OUT_7
Output
Steep Approach Discrete
7.4.14
J1-48
28V_DISC_11
Input
Not Defined in this ID (Note 3).
J2-15
28V_DISC_13
Input
Not Defined in this ID (Note 3).
J1-50
MON_OUT_3
Output
Not Defined in this ID (Note 3).
Configuration Data
Possible States
State
Lamp Format
Type 1,Type 2
Type 2
Flashing Lamps
True, False
False
Note 1: Provided by Momentary cockpit switch (non-latching)
Note 2: Provided by Alternate cockpit switch (Latching) with guard if inhibiting
Note 3: This discrete may be used in another category.
Note 4: Function is provided as an OR operation of the physical discrete and the 429 discrete word bit, if configured by the display type.