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NMEA stops and starts at random (garmin GPS 12)
Geert Maene wrote:
I have a garmin gps 12 that is connected to a raymarine interface and then to a com port on the PC. Last year everything worked perfect. This year the green LED in the interface (NMEA-led) stops and start when he wants. I cleaned all contacts, checked all the wires, stopped the PC and the DSC radio, but nothing helps. I called a technician. He said something about the minus (-) is connected to the ??? in the pc. I needed a special device to solve that. Has anybody more info about that error?? Geert Maene Data-in from the GPS12 goes to pin 2 at the RS232 plug, data-out from the PC goes through pin 3 on the RS232 plug to data-in on the GPS12. Pin 5 on the RS232 should go to a ground (-ve) lead. Years ago, it was also desirable to connect pin 4 to pin 6, and pin 7 to pin 8 within the 9-pin plug, but these were in the days of modem handshaking and MSDOS, and it is no longer necessary. Looking at the plug end on, Pin 1 is the topmost rightmost pin, so when you are soldering from the back, pin 2 becomes the second from the left, 3 is third from left, and 5 is the righmost pin, all in the top row (widest row). You can get the 4-pin Garmin wiring from the Garmin website, as this can also carry power to the Garmin instrument from a 12-volt source. It is doubtful whether the Garmin 4-pin plug has been wired incorrectly unless some person has re-wired it. Dennis. |
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