Garmin GNC 420AW Installation Manual - page 65
GNS 400W Series Installation Manual
Page 4-11
190-00356-08
Rev. G
4.5.2
Annunciators/Switches Electrical Characteristics
4.5.2.1
Annunciators
Pin Name
Connector
Pin
I/O
VLOC ANNUNCIATE
P4001
1
Out
GPS ANNUNCIATE
P4001
2
Out
WAYPOINT ANNUNCIATE
P4001
3
Out
TERMINAL ANNUNCIATE
P4001
4
Out
APPROACH ANNUNCIATE
P4001
5
Out
MESSAGE ANNUNCIATE
P4001
6
Out
OBS ANNUNCIATE
P4001
7
Out
SPARE ANNUNCIATE
P4001
8
Out
INTEGRITY ANNUNCIATE
P4001
9
Out
GPS SELECT [1]
P4001
13
Out
ILS/GPS APPROACH
P4001
14
Out
[1] The Operation of the GPS SELECT can be configured. Refer to Section 5.3.3.
All outputs sink up to 250 mA when activated.
4.5.2.2
Switch Inputs
Pin Name
Connector
Pin
I/O
OBS MODE SELECT
P4001
71
In
CDI SOURCE SELECT
P4001
73
In
COM REMOTE RECALL
P4001
74
In
DEMO MODE SELECT
P4001
75
In
AIR/GROUND
P4001
70
In
These inputs are considered active if either the voltage to ground is
4.5.2.3
TIME MARK OUT
Pin Name
Connector
Pin
I/O
TIME MARK OUT
P4001
16
Out
TIME MARK OUT outputs a 1 ms ± 1 s wide pulse once every 1.0 s ± 2 ms. TIME MARK OUT is a
logic level output, capable of sourcing 1 mA at greater than 3.8 V and sinking 1 mA at less than 0.4 V.
4.5.3
Annunciators/Switches Configuration
Refer to Section 5.3.3 for configuration of the GPS SELECT output and AIR/GROUND input.
4.5.4
Annunciators/Switches Calibration and Checkout
Refer to Section 5.3.9 for the annunciators/switches checkout.
4.5.5
Annunciators/Switches Interconnect
Refer to Appendix H for annunciators/switches interconnect information.