Getting ready to build my NMEA network [mix of 0183 and 2000 equipment]. Is there anything that needs to be isolated from the NMEA wiring, such as ac or dc wiring, VHF or routers, compass etc
NMEA
- Thread starter wufibugs
- Start date
I would say not to worry about DC but try to steer clear of AC and your VHF antenna. Also stay away from your compass and heading sensor if equipped.
and understand that 2000 and 0183 don't mix directly. You need a converter to let the 0183 format be used on the 2000 network.
Given that NMEA is a 5 volt signal you will not be causing much interference to other circuits but the radio antenna cable (and possibly its power circuit) can cause interference with NMEA
Given that NMEA is a 5 volt signal you will not be causing much interference to other circuits but the radio antenna cable (and possibly its power circuit) can cause interference with NMEA
Ouch! The converters are $200 or so. Maybe for now I'll have to stick with a straight 0183 system.
If you have the opportunity, I would go with a NMEA2000. It is a actual modern network, with high speed multi-directional data flow and a high degree of fault tolerance. NMEA0183 is basically a serial port; designed for one 'talker' and maybe two listeners. You can run out of capability fast, and trying to be clever with it can cause very irritating intermittent problems.
If you can make 0183 work now, go for it. When it makes sense, bite the bullet and get a converter.
Agreed. Try to do as much 2000 as you can. Mixing it is not that bad depending on what equipment you are interfacing. Check out my current network drawing for an example. This was how my boat was. I am updating some equipment this year. The second drawing is my new planned installation.
List what equipment you have and whether it is 0183, 2000 or both and we should be able to help you plan it.
List what equipment you have and whether it is 0183, 2000 or both and we should be able to help you plan it.
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Tim
what software did you use to draw all that?
I just bit the bullet and have gone all 2000 this year but my electronics where in desperate need of upgrade anyway. This should allow total integration of everything, my old B&G did not talk to my E120.
what software did you use to draw all that?
I just bit the bullet and have gone all 2000 this year but my electronics where in desperate need of upgrade anyway. This should allow total integration of everything, my old B&G did not talk to my E120.
NMEA 0183 is a single talker-multiple listener communications protocol. One port is out and the other(s) are in. So the GPS talks and everybody else listens, or the depth talks and everybody else listens......That is way there "should" be both a talker and listener port on each device.....then all you have to do (sic) is connect the talkers to the right listeners.
GPS is a talker
depth is a talker
wind is a talker
knot meter is a talker
......
chart plotter is a listener and talker
autopilot is a listener and talker
so the only problem is you can't just tie all the talkers together at one (chart plotter) listening port because of the data collisions that will occur between the talkers all sending data with out any coordination between when each talk
NMEA 2000 is a multi talker - multi listener and has protocols to handle the data collisions. think of it as a priority assigned to each talker. all talkers are required to monitor the circuit and if they hear somebody else while they are talking they stop, wait a prescribed time (the priority number with more important talkers having shorter wait times) then start sending data again.
GPS is a talker
depth is a talker
wind is a talker
knot meter is a talker
......
chart plotter is a listener and talker
autopilot is a listener and talker
so the only problem is you can't just tie all the talkers together at one (chart plotter) listening port because of the data collisions that will occur between the talkers all sending data with out any coordination between when each talk
NMEA 2000 is a multi talker - multi listener and has protocols to handle the data collisions. think of it as a priority assigned to each talker. all talkers are required to monitor the circuit and if they hear somebody else while they are talking they stop, wait a prescribed time (the priority number with more important talkers having shorter wait times) then start sending data again.
Nice job, Tim.
Like, for all the rest of you: it simply doesn't matter what software you use, you can even do it with a pencil and paper: just...
Draw a wiring diagram.
You'll all be better off doing that, and helping us to help you if you have an issue.
All the best,
Stu
Like, for all the rest of you: it simply doesn't matter what software you use, you can even do it with a pencil and paper: just...
Draw a wiring diagram.
You'll all be better off doing that, and helping us to help you if you have an issue.
All the best,
Stu
Thanks to all. And especially Bill who dumbed it down to my level. Fortunately or un- my stuff is all new old stock, Lowrance Globalmap 3300, and an X48, and some pretty old school wind, depth and speed stuff so the 0183 should do for now [until I move up to the Hylas 50 that my Nigerian banker has ordered for me]. My Simrad WP10 wheelpilot neither talks nor listens, but still manages to steer the boat.
This is timely for me. My Raymarine C70 won't interface with the newer radars, so I am trying to decide what to scrap and what to keep. Autopilot, wind, tridata, and RS125 gps are all networked via Seatalk old version. Gps is also networked to the VHF through NMEA 0183. My current thinking is that the purchase of a seatalk 1 to Seatalk ng comverter is going to be the more judicious approach in my case. I know the c70 is obsolete and will need to be replaced if I get radar, but since it still works I was thinking about moving it to the nav station in the cabin as a backup, knowing that as soon as I do that Mr. Murphy will intervene and fry the c70.