NMEA 0183 wire color?

Duane Siegfri

I plan to connect the NMEA TX wires from my B&G Zeus 3 MFD to the Raymarine S3g Course Computer.  It's a bit confusing though, since B&G outputs to TX_A and TX_B and Raymarine has NMEA0183 connections noted "+" and "-".

I have one NMEA 0183 reference and they do not use + and - for wire designation since apparently there is no battery negative wire in the system.

Does anyone know if the TX_A wire connect to the "+" or "-" terminal on the S3g?  


Wanderer, SM#477

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