Garmin GNC 420AW Installation Manual - page 69
400W Series Installation Manual
Page 4-11
190-00356-02
Rev. F
4.5.2
125B
Annunciators/Switches Electrical Characteristics
4.5.2.1
231B
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
AUTO 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
392H
5.3.3.
All outputs sink up to 500 mA when activated.
4.5.2.2
232B
Switch Inputs
Pin Name
Connector
Pin
I/O
OBS MODE SELECT
P4001
71
In
CDI SOURCE SELECT
P4001
73
In
COM REMOTE RECALL [1]
P4001
74
In
DEMO MODE SELECT
P4001
75
In
[1] Main software version 3.00 or later
These inputs are considered active if either the voltage to ground is < 1.9 V or the resistance to ground is
< 375
Ω. These inputs are considered inactive if the voltage to ground is 11-33 VDC.
4.5.2.3
233B
TIME MARK OUT
Pin Name
Connector
Pin
I/O
TIME MARK OUT
P4001
16
Out
TIME MARK OUT outputs a 1 ms ± 1
μs 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
126B
Annunciators/Switches Configuration
Refer to Section
393H
5.3.3 for configuration of the GPS SELECT output.
4.5.4
127B
Annunciators/Switches Calibration and Checkout
Refer to Section
394H
5.3.9 for the annunciators/switches checkout.
4.5.5
128B
Annunciators/Switches Interconnect
Refer to
395H
Appendix H for annunciators/switches interconnect information.