Garmin GNC 420AW Installation Manual - page 67
400W Series Installation Manual
Page 4-9
190-00356-02
Rev. F
4.5
43B
Annunciators/Switches
4.5.1
124B
Annunciators/Switches Function
NOTE
Installations in conformance with the requirements specified in this installation manual
may not require the use of any external annunciators, since all annunciations are provided
on the 400W Series front panel. Refer to Section
391H
2.5.1 to determine whether or not
external annunciators are required.
4.5.1.1
215B
Message Annunciate
When a new status message is available, the Message Annunciator flashes. When status messages remain
effective, the Message Annunciator illuminates.
4.5.1.2
216B
Waypoint Annunciate
The waypoint annunciator output is driven in the following manner:
1.
When the aircraft is within 10 seconds of reaching the turning point for a course change, the
waypoint annunciator flashes.
2.
When the aircraft is in a turn, the waypoint annunciator illuminates and remains illuminated until
the turn is completed.
3.
When a user arrival alarm is set and the aircraft is within the circle defined by the arrival alarm
radius at the arrival waypoint, the waypoint annunciator flashes for 10 seconds.
4.
When a user arrival alarm is not set and the aircraft is within 10 seconds of reaching the arrival
waypoint, the waypoint annunciator flashes.
4.5.1.3
217B
CDI SOURCE SELECT (GNS 430W Only)
This discrete input may be used to toggle between display of GPS and VOR/LOC/Glideslope information
on the MAIN external CDI/HSI. A momentary low on this pin performs the same function as pressing
the ‘CDI’ key on the GNS 430W bezel.
4.5.1.4
218B
VLOC ANNUNCIATE (GNS 430W Only)
This annunciator output is driven when the unit is configured with a single CDI/HSI and the VOR/ILS
data is being displayed on the CDI/HSI. This output parallels the VLOC annunciator on the display.
4.5.1.5
219B
GPS ANNUNCIATE (GNS 430W Only)
This annunciator output is driven when the unit is configured with a single CDI/HSI and the GPS data is
being displayed on the CDI/HSI. This output parallels the GPS annunciation on the display.
4.5.1.6
220B
OBS MODE SELECT
This discrete input may be used to toggle between GPS OBS and GPS AUTO modes of operation. A
momentary low on this pin performs the same function as pressing the ‘OBS’ key on the 400W Series
unit.
4.5.1.7
221B
OBS ANNUNCIATE
This annunciator output is driven to indicate GPS OBS mode of operation. This output is active when the
OBS or SUSP annunciation is on the display.
4.5.1.8
222B
TERMINAL ANNUNCIATE
When performing approach navigation, the terminal annunciator is illuminated when operating within 30
nautical miles of the departure or arrival airport and the CDI scale is the equivalent or 1.0 nm or less.