NMEA 0183 connection question

[potentillaCO32]

As per a previous thread I am connecting my emtrak AIS device to my clipper gps repeater. I've checked the manuals and the emtrak gives the info the gps repeater needs through the RMC sentence.

My question is around connecting them. The emtrak has two transmit wires. A transmit +ve and a transmit -ve. The Clipper has only 1 wire, an NMEA receive wore which I assume I connect the emtrak +ve transmit to.

What do I connect the emtrak -ve transmit to? Nothing? a common ground? Any expertise welcomed.

 

[TSB240]

Connect the emtrak negative to the common ground of the clipper.

 

[Norman_E]

NMEA 0183 is not just a single standard because different manufacturers interpreted it differently, and because changes were made over time. There is a lot of information here. https://actisense.com/wp-content/uploads/2021/01/Everything-you-need-to-know-about-NMEA-0183-1.pdf They used to publish a very comprehensive guide to NMEA 0183, and may still do so, although I cannot now find it on the website. It was called something like "All you need to know about NMEA 0193, but were afraid to ask." The one I have linked contains most if not all the information.
I used an Actisense NGW-1 to connect my old NMEA 0183 wind system to a new NMEA 2000 system.

 

[potentillaCO32]

NMEA 0183 is not just a single standard because different manufacturers interpreted it differently, and because changes were made over time. There is a lot of information here. https://actisense.com/wp-content/uploads/2021/01/Everything-you-need-to-know-about-NMEA-0183-1.pdf They used to publish a very comprehensive guide to NMEA 0183, and may still do so, although I cannot now find it on the website. It was called something like "All you need to know about NMEA 0193, but were afraid to ask." The one I have linked contains most if not all the information.
I used an Actisense NGW-1 to connect my old NMEA 0183 wind system to a new NMEA 2000 system.

That is really useful. That would suggest that one of my devices, the talker, is v2 and the listener is pre v2. But it says that the talker continuously broadcasts on the +ve line. So it should work.

As tsb240 has said i will connect the talkers -ve to the common ground.

 

[KompetentKrew]

There is a lot of information here. https://actisense.com/wp-content/uploads/2021/01/Everything-you-need-to-know-about-NMEA-0183-1.pdf They used to publish a very comprehensive guide to NMEA 0183, and may still do so, although I cannot now find it on the website. It was called something like "All you need to know about NMEA 0193, but were afraid to ask."

Here it is - PDF

I'm not sure that this is substantially different from the one you linked, maybe just the previous edition?

Mirror of the PDF at Wayback Machine and Archive.is