P
3502
GMA 35 Audio Panel
NOTES:
1. ALL WIRES 24
AWG OR LARGER UNLESS OTHERWISE SPECIFIED.
2. GROUND DESIGNATIONS: SHIELD BLOCK GROUND AIRFRAME GROUND
3. THE RS-232 CONNECTION TO THE GTN 725/750 IS REQUIRED FOR COMMAND AND CONTROL OF THE GMA 35 AUDIO
PANEL FUNCTIONS. THE GTN 7XX IS THE CONTROLLER FOR THE GMA 35.
4. THE MIDDLE MARKER SENSE OUTPUT IS AN ACTIVE-HIGH DISCRETE SIGNAL. IT CAN BE USED BY SOME FLIGHT
CONTROL SYSTEMS TO INCREASE THE AUTOPILOT GAIN AFTER THE AIRCRAFT PASSES THE MIDDLE MARKER.
REFER TO THE SPECIFIC AUTOPILOT INSTALLATION DATA FOR MORE DETAIL.
5. REFER TO SECTION 3.6.7 FOR INSTRUCTIONS ON WIRING THE ANTENNA CONNECTIONS TO THE GMA 35.
6. THESE OUTPUTS CAN BE USED TO DRIVE EXTERNAL MARKER LAMPS, IF DESIRED.
7. THE CIRCUIT BREAKER SHOULD BE LABELED AS SHOWN DIRECTLY ADJACENT TO THE CIRCUIT BREAKER. THE
CIRCUIT BREAKER MUST BE READILY ACCESSIBLE TO THE PILOT.
8. IF THIS RS-232
PORT IS ALREADY USED FOR ANOTHER PURPOSE, ANY RS-232 PORT MAY BE CONNECTED IN LIEU OF
THIS PORT. REFER TO SECTION 5.5.1.2 FOR RS-232 SETTINGS.
9. VERIFY AIRCRAFT GROUND MEETS BONDING REQUIREMENTS IN SECTION 2.4.5
.
s
3
AIRCRAFT POWER
AIRCRAFT POWER
3A (14/28 VDC)
14/28 VDC AIRCRAFT
POWER
20 AWG
9
8
AIRCRAFT GROUND
AIRCRAFT GROUND
20 AWG
11
10
AIRCRAFT
GROUND
Marker Beacon
Antenna
s
P1001
GTN 725/750
RS-232 OUT 2
RS-232 IN 226
7
RS-232 IN
RS
-232 OUT 18
17
MARKER ANTENNA IN LO
MARKER ANTENNA IN HI 1
2
P3501
RS-232 GND 245
4
MIDDLE MARKER SENSE OUT
39
INNER MARKER LAMP OUT
36
MIDDLE MARKER LAMP OUT
38
OUTER MARKER LAMP OUT
37
6
5
AUDIO
7
8
s
AIRCRAFT
GROUND
9
