Garmin GNC 255A User Manual

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page D-25
NOTES
Figure D-15 GTR/GNC - GTN 6XX/7XX, GNS 400W/500W, and GNS 480 Interconnect
ALL WIRES 24 AWG OR LARGER UNLESS OTHERWISE SPECIFIED.
GROUND DESIGNATIONS: SHIELD BLOCK GROUND AIRFRAME GROUND
AT GTR/GNC, CONNECT SHIELD GROUNDS TO THE CONNECTOR BACKSHELL – THE SHIELD
TERMINATION LEADS SHOULD BE LESS THAN 3.0". CONNECT OTHER END OF THE SHIELD PER THE
REMOTE EQUIPMENT INSTALLATION REQUIREMENTS.
CONFIGURE RS-232 OUTPUT TO “AVIATION FORMAT 1” FORMAT. ANY AVAILABLE RS-232 OUTPUT PORT
MAY BE USED.
CONFIGURE RS-232 OUTPUT TO “AVIATION” FORMAT. ANY AVAILABLE RS-232 OUTPUT PORT MAY BE
USED.
CONFIGURE GTR/GNC SERIAL PORT FOR “AVN IN/MAPCOM.”
CONFIGURE RS-232 OUTPUT TO “MAPCOM” FORMAT. RS-232 OUTPUT PORT 1 OR PORT 5 MAY BE USED.
P2001
GTR/GNC
16RS-232 IN
s
s
RS-232 OUT 1
RS-232 GROUND 1
RS-232 GND 31
P1001
8
46
GARMIN
GTN 6XX/7XX
P2001
GTR/GNC
16RS-232 IN
s
RS-232 OUT 2
RS-232 GND 31
P4001/
P5001
58
GARMIN
GNS 400W/500W
6
6
5
4
P2001
GTR/GNC
16RS-232 IN
s
RS-232 OUT 2
RS-232 GND 31
P4001/
P5001
22
GARMIN
GNS 480
6
RS-232 GROUND
7
3
1
2
S
3
4
5
6
7

Garmin GNC 255A Specifications

General

Brand	Garmin
Model	GNC 255A
Category	Transceiver
Language	English

Summary

General Description

General Specifications

COM Specifications

Technical specifications for the COM transceiver functions.

VOR Specifications

Technical specifications for VOR reception.

LOC Specifications

Technical specifications for LOC reception.

Glideslope Specifications

Technical specifications for Glideslope reception.

Limitations

Installation Overview

Antenna Considerations

Cabling and Wiring Considerations

Installation Procedures

Equipment Mounting

Connector Pinout Information

Pin Function List

Detailed pin assignments for COM and NAV connectors.

Power, Lighting, And Antennas

Serial Data – RS-232

Post Installation Configuration and Checkout Procedures

System Configuration Overview

Mounting, Wiring, and Power Checks

Verifying installation integrity and power connections.

Configuration Mode Operations

Steps to access and navigate configuration settings.

Ground Checks (Configuration Mode)

Verification tests performed in configuration mode.

Ground Checks (Normal Mode)

Functional checks performed in normal operating mode.

Flight Checks

Procedures for verifying system performance in flight.

Software Loading

Appendix B GTR/GNC Data Format

Appendix D Interconnect Diagrams

Drawing List