gjgm
Well-Known Member
sorry, who is the resident expert.. cant recall.
nmea 2000
- Thread starter gjgm
- Start date
PaulGooch
Well-Known Member
Absolutely not an expert, but i do have a Garmin NMEA 2000 network.
What's your problem/question ?
gjgm
Well-Known Member
How do you convert transducer output to nmea 2000, as it is brand specific?
jfm
Well-Known Member
You need a converter box. Raymarine and Garmin do one for their transducers (Raymarine call it a "pod").
I have never seen a generic one but if anyone does one it's likely to be Maretron
PaulGooch
Well-Known Member
Will depend on the make of display and the transducer you want to attach. For instance, Garmin, Raymarine and Standard Horizon depth transducers are all made by Airmar and connect to "black boxes". The Garmin and Raymarine ones (late models) will then connect to a non NMEA 2000 network, which is really ethernet, whilst the SH one is NMEA 0183.
There's also a bunch of analogue devices that can be adapted to NMEA 2000, such as rudder angle sensors.
As NMEA 2000 is supposed to be a standard, any NMEA 2000 compliant device from company X should connect to a NMEA 2000 network that comprises of components made by companies A, B and C, all connected to a display from company Z. So in theory at least, an NMEA 2000 rudder angle adapter from Garmin should connect to a VDO rudder angle sensor and a Raymarine plotter.
In theory
What is it, exactly, that you're thinking of doing ?
There's also a bunch of analogue devices that can be adapted to NMEA 2000, such as rudder angle sensors.
As NMEA 2000 is supposed to be a standard, any NMEA 2000 compliant device from company X should connect to a NMEA 2000 network that comprises of components made by companies A, B and C, all connected to a display from company Z. So in theory at least, an NMEA 2000 rudder angle adapter from Garmin should connect to a VDO rudder angle sensor and a Raymarine plotter.
In theory
What is it, exactly, that you're thinking of doing ?
jfm
Well-Known Member
Paul, two things:
1. Some transducers might connect to ethernet downstream of the black box as you say, but not all. Raymarine do a "pod" that converts their depth transducer to N2k and this then connects to the STNG backbone. i had this on my last sq58. And Garmin do a depth/temp/speed transducer that connects to a black box and thence to the Garmin N2k backbone. I have this on current sq78.
2. NMEA2000 is stnadard but output from a transducer isn't. So it's not at all certain that the VDO angle sensor device would connect to the N2K Garmin N2k converter black box
1. Some transducers might connect to ethernet downstream of the black box as you say, but not all. Raymarine do a "pod" that converts their depth transducer to N2k and this then connects to the STNG backbone. i had this on my last sq58. And Garmin do a depth/temp/speed transducer that connects to a black box and thence to the Garmin N2k backbone. I have this on current sq78.
2. NMEA2000 is stnadard but output from a transducer isn't. So it's not at all certain that the VDO angle sensor device would connect to the N2K Garmin N2k converter black box
gjgm
Well-Known Member
Will depend on the make of display and the transducer you want to attach. For instance, Garmin, Raymarine and Standard Horizon depth transducers are all made by Airmar and connect to "black boxes". The Garmin and Raymarine ones (late models) will then connect to a non NMEA 2000 network, which is really ethernet, whilst the SH one is NMEA 0183.
There's also a bunch of analogue devices that can be adapted to NMEA 2000, such as rudder angle sensors.
As NMEA 2000 is supposed to be a standard, any NMEA 2000 compliant device from company X should connect to a NMEA 2000 network that comprises of components made by companies A, B and C, all connected to a display from company Z. So in theory at least, an NMEA 2000 rudder angle adapter from Garmin should connect to a VDO rudder angle sensor and a Raymarine plotter.
In theory
What is it, exactly, that you're thinking of doing ?
Well, I changed to Garmin, and changed the paddle log to a Airmar/Garmin speed,depth,temp triducer, Nmea 2000. All very neat. Only the depth wont function over about 20 knots, so useless. The old Airmar/Raymarine transducer is still there, and of course that did work fine, so I am wondering how to use that.
Option 1 is to try to convert it to NMEA 2000 and so use with the Garmin. Option 2 is fit an old Raymarine ST60....
Option 3 is fit another Airmar Nmea 2000 sounder, but that's immediately only possible if it fits into the same sleeve, otherwise I have to lift the boat out- and it only went in two days ago.
jecuk
Well-Known Member
Sounds like you have a faulty triducer - or have you been told that depth will never work over 20kts? Have you called Garmin?
gjgm
Well-Known Member
Yea, I left the rudder angle as Raymarine, so at least that works.
Actually it didnt, but it did after taking the plotter, ST60 and GMI10 all back out... Oh, and the AIS isnt working either, but I think that is the unit as it doesnt even register on the unit itself...all in all, not a good Sunday.
jfm
Well-Known Member
I'm with jecuk. There must be a fault with your triducer or the installation of it. I have the same one and it is fine above 20kts. Surely it's better if you fix this, than your options 1,2,3
jimmy_the_builder
Well-Known Member
Could it be the installation position of the triducer? If there's turbulent flow over the triducer at planing speeds, wouldn't this cause the depth reading to stop working?
Cheers
Jimmy
Cheers
Jimmy
gjgm
Well-Known Member
Maybe I had better have a word with Airmar. As it is located exactly the mirror image of the other one in the hull, I cant see why the location should be a problem.
Edit- well that was my assumption before a few replies on here, Jimmy. Or maybe this unit is more sensitive to location that the much larger previous one.
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jimmy_the_builder
Well-Known Member
No upstream skin fitting that could be disrupting the flow on that side of the hull?
Cheers
Jimmy
Cheers
Jimmy
gjgm
Well-Known Member
Right, that's just what a very very helpful guy at Airmar just asked..I can see I should had phoned you ! About to ask my very good friends in Lymington
50/50 chance, and I take out the wrong one.It looks like Airmar also make a single nmea 200 transducer that, fingers crossed, fits into the same sleeve as the old one. What happens if you have two nmea 2000 rdepth eadings on the same backbone?
jfm
Well-Known Member
It's generally no problem, if the software in your displays have the necessary functionality. Each of the depth readings will have an instance number (identifying which transducer it is spoken by) and you program your plotter (or whatever display you're using) to display the one you choose. I have three GPS mushrooms on my backbone and it all works fine. I just tell the Garmin plotters which one to display on the display
PaulGooch
Well-Known Member
Option 4 is to chop the plug off the existing Raymarine transducer and wire it to a Garmin plug or a length of cable from a dead Garmin transducer.
But, as said, the new one should work. Both Garmin and Raymarine use Airmar transducers.
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gjgm
Well-Known Member
I am ignorant of this, but I dont think transducers (non Nmea anyway) are interchangeable between plotter manufacturers. IE the current Raymarine transducer wont work with the Garmin plotter.
In fact since the old transducer isnt Nmea 2000, it wont connect to the Garmin Nmea 2000 for sure.
Possibly the Garmin converter might work, but I suspect only with Airmar/Garmin pre Nmea 2000 transducers- ie, not with a Raymarine dedicated one.
Airmar suggest the old transducer is not in a sleeve/removable after all. So now I am running out of options, I think. Well, I can save alot of fuel and drive slowly, I guess.
PaulGooch
Well-Known Member
I think we're talking about different systems here John. As for connecting to an NMEA 2000 network, you're right, although Airmar now do straight NMEA 2000 transducers that don't need the "pod".
What i was referring to was using an "old style" transducer. That would be connected to the Garmin Marine network, for example, using one of their GSD22 black box fishfinders.
Sounds like you're using the Garmin Nmea 2000 Tranducer Adapter Kit with a standard transducer ? Or one of these : https://buy.garmin.com/shop/shop.do?pID=35610
As you say, it might not be certain that it will work (various networking was never certain, as we know). But, according to Garmin installation manuals, it should do and can be configured and calibrated for individual sensors. It's a fair bet that a rudder sensor isn't really any different to a fluid level sensor, which they also make adapters for.
wakeup
Well-Known Member
Oddly I have the opposite problem, I have a Raymarine through hull transducer that stops working over 22knots and a Garmin transom mounted transducer that works perfectly at any speed.
gjgm
Well-Known Member
Ah, I was looking for that this morning, but couldnt find it.
So, the question is, will it work with a Raymarine dedicated Airmar transducer...?
My last hope !
So, the question is, will it work with a Raymarine dedicated Airmar transducer...?
My last hope !
