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4 pin Garmin round proprietary connector layout
Разъем 4 pin Garmin round proprietary
Pin Name
1 DATA RX into the unit (RS232 Rx)
2 DATA TX from the unit (RS232 Tx)
4 Vcc (8 to 40 V) read manual before for the maximum allowed. Most of GPS units may be charged with +12V power supply (for example from car cigarette lighter connector)

For GPS45, GND is pin 2, power is pin 4? 

На распиновку Garmin GPS 45, 12 XL, GPS II, III, V, 72, 76, 92, 176, 176c, 196, 295, StreetPilot III (round connector) есть 15 отзыв(а): 12 положительных и 2 отрицательных.

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