I have a Lowrance LCX 37c sounder/chartplotter that I bought new 3 years ago. It is NMEA 18-2000 compliant and has 2 comm. ports. I recently bought a Standard Horizon Matric GX2100 AIS capable VHF radio.
I can't figure out how to connect all the tiny colored NMEA data wires togther to get the GPS to talk to the radio and the AIS to talk to the chartplotter. I have looked around for info on this and all I find is stuff on how to connect the newer Lowrance HDS units.
Does anyone know, or have info on howto connect these 2 units to get them to work with each other?
http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LCX113-112-38-37-28-27_0151-511_12-08-06.pdf
http://www.standardhorizon.com/downloadFile.cfm?FileID=6195&FileCatID=86&FileName=GX2000%5FGX2100%5FOwner%27s%20Manual%20r2.pdf&FileContentType=application%2Fpdf
You want NMEA out from Lowrance to flow to the GX2100 NMEA in.
So you go to page 32 of the Lowrance manual, find that Yellow is NMEA out + and Shield (bare wire) is NMEA ground.
Then you read page 21 of the GX2100 manual and find that Green is the NMEA ground, Blue is the NMEA GPS input.
Thus, Yellow -> Blue and Shield -> Green is what you need. All other wires not needed. You may need to tell the Lowrance to use COM1 to transmit GPS data, see page 143 of the manual. Page 131 of the GX2100 manual tells you which sentences (prefixes) to enable in the Lowrance: GGA, GLL, GNS, RMC.
And there's no point to sending AIS data to the LCX because it can't plot AIS targets, but I guess you learned that at the Hull Truth: http://goo.gl/SGbfA