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3-7190-11110-00 Rev. G
Garmin GDL 39 Portable ADS-B and GPS Receiver User’s Guide
3.1.6 GDL 39R dSub Connector Pin Out
Pin Number Description
1 Discrete Input
2 Tx A (Data Out)
3 Rx A (Data In)
4 ID Pin
5 Ground
6 Tx B (Data Out)
7 Rx B (Data In)
8 Ground
9 Vin 10-32 VDC
Table 3-2 GDL 39R Pin Out Connections
A connector kit including the connector and pins is available for the GDL39R,
P/N 010-11825-20.
NOTE: Leave the ID pin disconnected unless wiring to a
GPSMAP396/496. If connecting to a GPSMAP396/496 connect a
16.5 KOhm resistor (not provided) between this pin and ground.