confusing nmea wirring

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Don12364

Don12364

.
Dec 2, 2003
1,637
Hunter 376 Warsash, England --
Confusing NMEA0183

Dear Dinosaur,
I downloaded each of the manuals for the three items you have and agree the instructions are very muddled. This is a good illustration of the state of the industry.
I assume you have the plug/ socket shown in the Autopilot manual and so I have made a wiring diagram for this to suit your boat.
The 12 volt power wiring to each item is also shown and I am suggesting you have a switch and fuse for each, though you may decide to combine some of these.
You can use a contact breaker in place of a fuse and often these incorporate an ON/OFF switch thus doing both jobs.
I have also shown a connector strip or block of the type used in domestic wiring and available very cheaply at hardware stores. Use the smallest size. Also the NMEA wiring is only light gauge wire.

To cut through the garbage, if a room full of people all talk at once then it is chaos. To overcome this the instruction is "Stand in Line and Speak in Turn". This is what NMEA 1083 does.
Apologies for a poor quality picture but this site instantly re-compresses my original diagrams to the point where they go fuzzy.
If you have doubts or queries please send a private mail through this site.
 

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JerryA

JerryA

.
Oct 17, 2004
549
Tanzer 29 Jeanneau Design Sandusky Bay, Lake Erie
Great thread guys! Motivated me to go out to the shop and troubleshoot my connection from the GPS to my VHF. And... now it works!

JerryA
 
Manureva

Manureva

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Jan 14, 2011
243
tanzer tanzer 28 bathurst nb
dear sir genius!

Donalex said:
Dear Dinosaur,
I downloaded each of the manuals for the three items you have and agree the instructions are very muddled. This is a good illustration of the state of the industry.
I assume you have the plug/ socket shown in the Autopilot manual and so I have made a wiring diagram for this to suit your boat.
The 12 volt power wiring to each item is also shown and I am suggesting you have a switch and fuse for each, though you may decide to combine some of these.
You can use a contact breaker in place of a fuse and often these incorporate an ON/OFF switch thus doing both jobs.
I have also shown a connector strip or block of the type used in domestic wiring and available very cheaply at hardware stores. Use the smallest size. Also the NMEA wiring is only light gauge wire.

To cut through the garbage, if a room full of people all talk at once then it is chaos. To overcome this the instruction is "Stand in Line and Speak in Turn". This is what NMEA 1083 does.
Apologies for a poor quality picture but this site instantly re-compresses my original diagrams to the point where they go fuzzy.
If you have doubts or queries please send a private mail through this site.
Click to expand
thanks a lot! that is the best answer i got on this yet !
i really appreciate the time invested in finding an answer for me!
i hope goods comes to you! thanks again!
 
Sumner

Sumner

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Jan 31, 2009
5,254
Macgregor & Endeavour 26S and 37 Utah's Canyon Country

I don't believe that the purple out of the VHF going to the GPS is going to do anything. I don't use it and have the same setup with the GPS/VHF.

The VHF output is NEMA DSC and DSE sentences that are meant to be sent to a Standard Horizon Plotter as far as I can tell from the manual. If so I don't think they will do anything for the GPS you have and don't need to be conneced and possibly could create a problem, but I might be wrong. Try it either or both ways and see what happens.

Is your Eclipse the "+" model (more expensive) or the less expensive one? I have the "+" connected to just the output and ground of a Eagle Cuda 350 GPS depth finder and they work great with just those two wires hooked up.

Good luck,

Sum

Our Trips to Lake Powell, UT - Kootenay Lake, Canada - Priest Lake, ID

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Bill Roosa

Bill Roosa

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Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
Grounds in signal circuits

That ground keeps the noise out.
Not at all sure I'd connect it to the boat ground though. that could actually let noise in.
Does the manual say to connect it to the boat ground?
 
Sumner

Sumner

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Jan 31, 2009
5,254
Macgregor & Endeavour 26S and 37 Utah's Canyon Country
rpwillia

rpwillia

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Sep 29, 2008
1,944
Catalina 310 #185 Quantico
If not the boat ground then what ground do you use?

I could not get my SH to see the NMEA signals until I added a 2nd ground from the boats ground directly to the radio ground wire. Then everything worked like magic. There may be noise there, but everything needs to at some reference, especially for signals.
 
Sumner

Sumner

.
Jan 31, 2009
5,254
Macgregor & Endeavour 26S and 37 Utah's Canyon Country
rpwillia said:
I could not get my SH to see the NMEA signals until I added a 2nd ground from the boats ground directly to the radio ground wire. Then everything worked like magic. There may be noise there, but everything needs to at some reference, especially for signals.
Click to expand
Just curious, are you talking about the NEMA common (-) or the 12 volt ground to the radio itself?

Sum
 
Ed Schenck

Ed Schenck

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Jun 2, 2004
5,802
Hunter 37-cutter, '79 41 23' 30"N 82 33' 20"W--------Huron, OH
From my reading of the TP22 doc it should do everything that my WP30 does. That includes steering to waypoints. As old as NMEA 0183 is most pilot computers accept those standard "sentences" like BOD( Bearing Origin to Destination ) and WPL( Waypoint Location information ). Like everyone has been saying, just a matter of matching up two wires.
 
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