Garmin GNC 255 User Manual

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. B Page 5-1
5 CONNECTOR PINOUT INFORMATION
5.1 Pin Function List
5.1.1 P2001 Connector – COM Board
(View looking at rear of unit, Pin 1 is top right)
Pin Pin Name I/O
1 RS-232 OUT 1 Out
2 LIGHTING HI 2 In
3 AUX AUDIO LINE LEVEL HI In
4 RESERVED --
5 COM MIC 1 AUDIO IN HI In
6 COM MIC 2 AUDIO IN HI In
7 500 Ω COM AUDIO HI Out
8 LIGHTING HI 1 In
9 RESERVED --
10 RESERVED --
11 COM MIC 1 KEY* In
12 INTERCOM ENABLE* In
13 SPEAKER OUT Out
14 RESERVED --
15 RESERVED --
16 RS-232 IN 1 In
17 RESERVED --
18 500 Ω COM AUDIO LO --
19 AUX AUDIO LINE LEVEL GND --
20 MIC AUDIO IN LO In
21 RESERVED --
22 LIGHTING LO 1 In
23 RESERVED --
24 RESERVED --
25 RESERVED --
26 COM MIC 2 KEY* In
27 COM REMOTE TRANSFER* In
28 COM REMOTE TUNE UP* In
29 COM REMOTE TUNE DOWN* In
30 AIRCRAFT POWER In
31 RS-232 GND --
32 LIGHTING LO 2 In
33 RESERVED --
1
2
34567891011131415
1617181920
222324252627282930
21
3132333435363738394041424344

Garmin GNC 255 Specifications

General

Channels	760
Frequency Range	118.000 to 136.975 MHz
Channel Spacing	25 kHz
Input Voltage	11 to 33 VDC
Dimensions	159 x 50 x 193 mm