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  NMEA-0183 Interface: A Universal Method

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Author Topic:   NMEA-0183 Interface: A Universal Method
jimh posted 12-21-2011 09:05 PM ET (US)   Profile for jimh   Send Email to jimh  
Please use this thread to comment on or ask questions about my NMEA-0183 Universal Interface method which is described in an article in the REFERENCE section.
jimh posted 04-29-2012 07:49 PM ET (US)     Profile for jimh  Send Email to jimh     
I added two new tables to show the connections to my Universal Interface arrangement for an HDS-8 when using the RS-232 mode which gives two serial ports.
jimh posted 04-30-2012 08:05 AM ET (US)     Profile for jimh  Send Email to jimh     
I revised the suggested wiring to the Universal Interface from a SIMRAD device based on an errata sheet that SIMRAD has been distributing with their devices.
newt posted 05-01-2012 12:05 PM ET (US)     Profile for newt  Send Email to newt     
The [NMEA] connections for my Garmin GPS 2010 were so confusing, I actually made a laminated template to mount behind the connectors, figuring that final installation on the boat and future trouble shooting would be simpler. Here is a photo taken in the early stages while the panel is on the bench.

https://picasaweb.google.com/newtrevenge/ Boats?authkey=Gv1sRgCMrYoISVj4qUqwE#5737593901939370994

In contrast, connecting the Lowrance LMF-200 and four sensors, all NEMA-2000, was brainless!

jimh posted 03-22-2014 04:46 PM ET (US)     Profile for jimh  Send Email to jimh     
I had a wonderful idea last night on how to simplify the back plane wiring for my NMEA-0183 Universal interface. I got up this moring and rebuilt my test bench backplane and rewired the universal NMEA-0183 connectors (on my chart plotter, radio, and test adaptor) to the new arrangement.

Then I tested all of the devices by interconnecting them. Next, I had to take new pictures of the backplane, the connectors, and the wiring details. Then I revised the article to show the new layout of the connectors on the backplane, and the new wiring arrangement, and the new pictures.

This new wiring arrangement is so much better, I just love it! It makes constructing the backplane much simpler.

jimh posted 03-23-2014 12:40 AM ET (US)     Profile for jimh  Send Email to jimh     
My Universal NMEA-0183 Interface method can be used with any five-pole connector desired. I chose the ones I did for the very low cost. Any five-pole cable end connector could be used, and the backplane would then use the mating panel mount connector.

I also tried to make a very compact "backplane" or crossover connector by soldering two five-pin headers together with their pin layouts crossed. This proved to be harder than I thought. The plastic material of the header was not very thermo-resistant, and it started to deform when I applied some solder to the pins. Perhaps a higher-grade header with more thermo-resistant material might be better in that application.

If cable end connectors are used, I recommend using a female connector. Use the mating male connector on the backplane.

jimh posted 03-23-2014 01:44 PM ET (US)     Profile for jimh  Send Email to jimh     
I added a new illustration, showing how a five-pole terminal strip could be used as a connection point for the Universal NMEA-0183 interface.
jimh posted 05-16-2014 12:17 PM ET (US)     Profile for jimh  Send Email to jimh     
I added a new illustration, showing a test adaptor I made to facilitate making a temporary connection to my Universal Interface with a device that has a wire fan out of NMEA signals.

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