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Trying to understand NEMA 2000 Network

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I am trying to figure out how and what is involved with adding a NEMA 2000 network to my boat. I have a Garmin 741XS at my helm and wish to add a transducer, VHF interface and engine monitoring to it and maybe a few other items. The back of the Garmin unit has separate input jacks for transducer etc. but, am I correct in assuming that if I run a network cable to the one jack in the back of the unit then I can attach all those other items to the network harness and not have to chase the wires to the back of the Garmin GPS? If that is the case it will simplify all I have to do as my boat has no electronics other than the 741XS and I am dreading having to run wires to the helm for each item I add. Thanks in advance!

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As long as the item you add is nema 2000 compatible.  Not everything is.  Transducers will need a separate cable to the 741 and plugged into the jack marked.  Engine monitoring will need a gateway from your engine manufacture to convert data to nema 2000 standards.  Basically one cable from the GPS ran around then tee'd off for each device you wish to use the network then terminate the ends.  Each device should come with diagrams giving you an idea how to go about it.  Very basic description here.  Not hard at all once you get the idea.

I have two separate networks on my boat, one for the auto-glide system and another for engine monitoring, fusion stereo, two fusion remotes, garmin weather, vhf, two sounder boxes, and two repeater gauges.  Really neat how they all work together and yes a lot less wiring.

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I would go to the Garmin website and the manual. The manual has a great pic of a network setup. Yes, you can install a depth transduce on a NMEA2k network. BUT, it will only give you the depth read out. If you want to see the bottom (sea floor) than the transducer needs to be connected to a head unit as in your 741.

These transducers have different types of connections.  As mentioned, not everything is NMEA2k. But all VHF are NMEA0182 and some are NMEA2k. Meaning that you still can connect your VHF to your GPS using the 0183 standard. Your  dealing with 3 wires. in, out and common data. 

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Having added a NMEA 2000 network to my boat this past year I can tell you what you'll need.

1. You'll need a NMEA 2000 starter kit. This will include a NMEA power cable and one or two NMEA network T connectors and 2 NMEA T- terminators.The NMEA power cable will power the NMEA backbone.

2. For each device that you add to the NMEA network, you'll need 1 T-connector and a NMEA data cable.

I have the Garmin 7607, a Garmin Fuel Flow meter, the Garmin GMI-10 display and a non-NMEA 2000 VHF radio.

Because the radio is not NMEA2000, I had to wire it directly to the 7607 GPS map using the NMEA0183 wires. Very simple to do.

The Fuel flow meter, GMI10 and 7607 all have a NMEA wire each that go their own T connector. Each T-connector is screwed to the next so I have 4 T connectors on my NMEA2000 network.

NMEA Power, GFS10, GMI10 and 7607. The far left and far right T-connectors have the Terminator plugs on them.  To add an additional device to your network, just remove the terminator on the end T connector, add an additional T connector and replace the terminator on the new T connector. It's like Legos for adults. 

While I do use Garmin products, I DID NOT buy the way overpriced garmin NEMA starter kit. I found another brand and it all works the same. NMEA2000 is a standard and the 40 bucks I saved went to good use.

As someone else pointed out, the transducer will need to plug directly into the transducer port on your 741, just as the microphone needs to go directly to the radio. 

Good luck!

Steve
 

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My experience is similar to Steves.  I found the Garmin starter kit on eBay for a good price.  That is a better deal than buying ala cart.  I have a Garmin 7607xsv, a Fusion head unit with remote, Garmin GPS antenna, fuel flow meter (all NMEA2000) a transducer and VHF which are not NMEA2000.

Odds are the transducer will NOT be NMEA2000, so you will have to run it to the Garmin.  Your NMEA cable only needs to go where you have NMEA devices which based on what you are using will be your engine compartment for engine management (check your year of engine to make sure its compatible, I missed the cut off by a year :(  ).  If you want to have a transom audio remote some day you will need the bus near it as well.

I have the GPS at the helm.  The Fusion head unit is in the cuddy cabin.  The NMEA bus goes from the radio along the side of the boat all the way to the stern.  Along the way I have "T's" for the radio, bus power, GPS, antenna, fuel sensor and transom stereo keypad to connect to the bus.  I found that I had MUCH better GPS performance with the external antenna on the arch than using the built in antenna.

The Horizon radio is NMEA0183 so its wired to the NMEA0183 port on the back of the GPS.

The transducer cable is plugged into the back of the GPS.

So at the end of the day I have three cables connected to my GPS: the default power/NMEA0183 cable, the transducer and NMEA2000 cable.

I love how the Fusion stereo integrates into the Garmin.  I did away with my helm stereo remote as I have full control of it from the Garmin, and I have depth, and all the other GPS info available on the stereo remote on the transom. 

 

Garmin has a guide about how to install NMEA2000 here: http://static.garmin.com/pumac/Tech_Ref_for_Garmin_NMEA2k_EN.pdf

 

 

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I'm using Motorola ECM555's on twin 2003 4.3 /bravos I think it is compatible but I still have to look into it. Thanks for all the input!

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On 6/17/2016 at 6:54 PM, flyinverted said:

Having added a NMEA 2000 network to my boat this past year I can tell you what you'll need.

1. You'll need a NMEA 2000 starter kit. This will include a NMEA power cable and one or two NMEA network T connectors and 2 NMEA T- terminators.The NMEA power cable will power the NMEA backbone.

2. For each device that you add to the NMEA network, you'll need 1 T-connector and a NMEA data cable.

I have the Garmin 7607, a Garmin Fuel Flow meter, the Garmin GMI-10 display and a non-NMEA 2000 VHF radio.

Because the radio is not NMEA2000, I had to wire it directly to the 7607 GPS map using the NMEA0183 wires. Very simple to do.

The Fuel flow meter, GMI10 and 7607 all have a NMEA wire each that go their own T connector. Each T-connector is screwed to the next so I have 4 T connectors on my NMEA2000 network.

NMEA Power, GFS10, GMI10 and 7607. The far left and far right T-connectors have the Terminator plugs on them.  To add an additional device to your network, just remove the terminator on the end T connector, add an additional T connector and replace the terminator on the new T connector. It's like Legos for adults. 

While I do use Garmin products, I DID NOT buy the way overpriced garmin NEMA starter kit. I found another brand and it all works the same. NMEA2000 is a standard and the 40 bucks I saved went to good use.

As someone else pointed out, the transducer will need to plug directly into the transducer port on your 741, just as the microphone needs to go directly to the radio. 

Good luck!

Steve
 

Just to add, If your boat is newer, say starting at 2010. You may want to add a engine gateway. In this case fuel flow sensors will not be needed scenes that data will be coming off the engines. 

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2 hours ago, kosink said:

I am trying to figure out how and what is involved with adding a NEMA 2000 network 192.168 1.1 to my boat. 

I am not understanding your question. NMEA2K networks do not use I.P. addressing.

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21 minutes ago, Iggy said:

I am not understanding your question. NMEA2K networks do not use I.P. addressing.

He’s posted it three of four total posts, including one referencing Home Depot of all things. It might be a decoy and infect or do something bad to your device. Not sure. Doesn’t look right.

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5 minutes ago, Curt said:

He’s posted it three of four total posts, including one referencing Home Depot of all things. It might be a decoy and infect or do something bad to your device. Not sure. Doesn’t look right.

I just happen to see by chance the 2nd post. In it is a link, yes something is odd. thanks

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14 minutes ago, Iggy said:

I just happen to see by chance the 2nd post. In it is a link, yes something is odd. thanks

No worries. After watching and reading recent NMEA2000 discussions, started thinking about our boat. This is not my area of expertise and was leaning toward a new thread about interfacing an engine to GPS. Our 2016 has a Garmin GPS that has a synoptic page for gauges, but they’re not functional. No idea what’s needed to make them functional or how. Wondering if you, RJ and Texas might be able to provide guidance once I post engine, ECM, EVC and GPS particulars, and a picture of the helm. Planning to post this week or next. Since I can’t get pictures to post any longer, I don’t know how to get that to you and it might be relevant because we have twins and one GPS (can add another though if needed). I’d sure appreciate your guidance. Thanks.

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3 minutes ago, Curt said:

No worries. After watching and reading recent NMEA2000 discussions, started thinking about our boat. This is not my area of expertise and was leaning toward a new thread about interfacing an engine to GPS. Our 2016 has a Garmin GPS that has a synoptic page for gauges, but they’re not functional. No idea what’s needed to make them functional or how. Wondering if you, RJ and Texas might be able to provide guidance once I post engine, ECM, EVC and GPS particulars, and a picture of the helm. Planning to post this week or next. Since I can’t get pictures to post any longer, I don’t know how to get that to you and it might be relevant because we have twins and one GPS (can add another though if needed). I’d sure appreciate your guidance. Thanks.

Just to be clear, are they Volvo engines?

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1 minute ago, Iggy said:

Just to be clear, are they Volvo engines?

Yes. V8-300-CE-G with EVC. I’ll post particulars, including which version of EVC. I don’t have any of this handy at the moment. I assume you’ll need EVC version, GPS, picture of synoptic page, and...?

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1 minute ago, Curt said:

Yes. V8-300-CE-G with EVC. I’ll post particulars, including which version of EVC. I don’t have any of this handy at the moment. I assume you’ll need EVC version, GPS, picture of synoptic page, and...?

Lets slow down a little. First off, call Yacht Devices and tell them what year and model engines just to be on the safe side in buying there gateway. For all I know, something could have changes between my 2011 and your 2016 engines. Than we can go from there.

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1 minute ago, Iggy said:

Lets slow down a little. First off, call Yacht Devices and tell them what year and model engines just to be on the safe side in buying there gateway. For all I know, something could have changes between my 2011 and your 2016 engines. Than we can go from there.

No hurry. I’ll call them during the next week or two. Afraid to start a thread. I’m okay with non-OEM but was hoping to keep things VP. Will let you know what they say.

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2 hours ago, Curt said:

No worries. After watching and reading recent NMEA2000 discussions, started thinking about our boat. This is not my area of expertise and was leaning toward a new thread about interfacing an engine to GPS.

So you've changed your mind?  I hope before you make your final decision is at least wait until I post the photos and result of that Volvo NMEA2K Interface with Bluetooth.  Amazing stuff and really easy if you're not too intimidated by snaking a single cable from engines to helm storage.  You'll pay a little more but having the Volvo Interface itself is what did it for me.  Curious to see what you end up doing.

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4 hours ago, Curt said:

No hurry. I’ll call them during the next week or two. Afraid to start a thread. I’m okay with non-OEM but was hoping to keep things VP. Will let you know what they say.

Yep, call them I would doubt if anything has chaged. But a phone call takes 2 minutes.

I would suggest going to the Garmin or another site and see how a NMEA2K network is installed. Very simple once you know.

I would suggest too, that we start private messaging each other.

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7 hours ago, Iggy said:

Yep, call them I would doubt if anything has chaged. But a phone call takes 2 minutes.

I would suggest going to the Garmin or another site and see how a NMEA2K network is installed. Very simple once you know.

I would suggest too, that we start private messaging each other.

Evening. I visited the Garmin site a few weeks ago. Self help kind of thing. Downloaded the manual. Oddly, the online version is more detailed than the printed version in the blue Chaparral bag. After I gather particulars about my equipment and call Yacht Devices, I’ll post or PM. Thank you.

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13 minutes ago, Curt said:

Evening. I visited the Garmin site a few weeks ago. Self help kind of thing. Downloaded the manual. Oddly, the online version is more detailed than the printed version in the blue Chaparral bag. After I gather particulars about my equipment and call Yacht Devices, I’ll post or PM. Thank you.

You could call them tomorrow since the are in Europe.  

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@Iggy It's interesting how this old topic went live again thanks to a spammer.

@Curt It might be worth starting a new topic documenting your case. Some comments on the exchange of ideas quoted below.

Just my opinion regarding the electronics, stay with the brands you already have, VP and Garmin. The Yacht Devices is an innovative company often ahead of its peers and I am using one of their devices but only because I had no other choice then. Nothing wrong with that company but you really do not need one more brand in the electronics mix - KISS - as much as possible. Than more different brands you mix, each with their own interpretation and implementation of standards and own software or firmware update schedule, than more problems you will have over time. Despite the cross brand comprehensive testing the things not always work as intended by non-OEM small player like Yacht Devices.

The N2K cabling is nonissue, you can go with Garmin to keep things uniform and pay a bit extra, or with any other reputable N2K cabling vendor. Just keep in mind that not all of them have marine background and awareness of other NMEA and ABYC standards. I saw some strange "marine" stuff coming from China that I would never install in my boat.

To get you started on designing your own N2K boat network:

Technical Reference for Garmin NMEA 2000 Products (2012 - old but still good)
https://static.garmin.com/pumac/Tech_Ref_for_Garmin_NMEA2k_EN.pdf

Garmin Support - NMEA 2000 Troubleshooting
https://support.garmin.com/en-CA/?faq=656KiuIo733b27xQgmLBy7

 

On 9/1/2019 at 8:45 AM, Curt said:

No worries. After watching and reading recent NMEA2000 discussions, started thinking about our boat. This is not my area of expertise and was leaning toward a new thread about interfacing an engine to GPS. Our 2016 has a Garmin GPS that has a synoptic page for gauges, but they’re not functional. No idea what’s needed to make them functional or how. Wondering if you, RJ and Texas might be able to provide guidance once I post engine, ECM, EVC and GPS particulars, and a picture of the helm. Planning to post this week or next. Since I can’t get pictures to post any longer, I don’t know how to get that to you and it might be relevant because we have twins and one GPS (can add another though if needed). I’d sure appreciate your guidance. Thanks.

 

On 9/1/2019 at 8:48 AM, Iggy said:

Just to be clear, are they Volvo engines?

 

On 9/1/2019 at 8:52 AM, Curt said:

Yes. V8-300-CE-G with EVC. I’ll post particulars, including which version of EVC. I don’t have any of this handy at the moment. I assume you’ll need EVC version, GPS, picture of synoptic page, and...?

 

On 9/1/2019 at 8:57 AM, Iggy said:

Lets slow down a little. First off, call Yacht Devices and tell them what year and model engines just to be on the safe side in buying there gateway. For all I know, something could have changes between my 2011 and your 2016 engines. Than we can go from there.

 

On 9/1/2019 at 9:02 AM, Curt said:

No hurry. I’ll call them during the next week or two. Afraid to start a thread. I’m okay with non-OEM but was hoping to keep things VP. Will let you know what they say.

 

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7 hours ago, Rambo said:

Just my opinion regarding the electronics, stay with the brands you already have, VP and Garmin. The Yacht Devices is an innovative company often ahead of its peers and I am using one of their devices but only because I had no other choice then. Nothing wrong with that company but you really do not need one more brand in the electronics mix - KISS - as much as possible. Then more different brands you mix, each withe their own interpretation and implementation of standards and own software or firmware update schedule, then more problems you will have over time. Despite the cross brand comprehensive testing the things not always work as intended by non-OEM small player like Yacht Devices.

Amazing that I' actually agree with you on that entire concept, Richard.  Actually it's not, I've agreed with you on many things through the years as well as learnt a lot so it's not a surprise.  The exact reason I kept everything Volvo in mine.

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22 hours ago, Rambo said:

 

@Iggy It's interesting how this old topic went live again thanks to a spammer.

@Curt It might be worth starting a new topic documenting your case. Some comments on the exchange of ideas quoted below.

Just my opinion regarding the electronics, stay with the brands you already have, VP and Garmin. The Yacht Devices is an innovative company often ahead of its peers and I am using one of their devices but only because I had no other choice then. Nothing wrong with that company but you really do not need one more brand in the electronics mix - KISS - as much as possible. Then more different brands you mix, each withe their own interpretation and implementation of standards and own software or firmware update schedule, then more problems you will have over time. Despite the cross brand comprehensive testing the things not always work as intended by non-OEM small player like Yacht Devices.

The N2K cabling is nonissue, you can go with Garmin to keep things uniform and pay a bit extra, or with any other reputable N2K cabling vendor. Just keep in mind that not all of them have marine background and awareness of other NMEA and ABYC standards. I saw some strange "marine" stuff coming from China that I would never install in my boat.

To get you started on designing your own N2K boat network:

Technical Reference for Garmin NMEA 2000 Products (2012 - old but still good)
https://static.garmin.com/pumac/Tech_Ref_for_Garmin_NMEA2k_EN.pdf

Garmin Support - NMEA 2000 Troubleshooting
https://support.garmin.com/en-CA/?faq=656KiuIo733b27xQgmLBy7

 

 

 

 

 

 

Rambo, to your point on me. You could not make this up!!!

 

All good points on your post. Thats why a went with Yacht Devices. They approached the problem with a whole different point of view than Volvo. 

 

I went with Maretron and Garmin on the network parts. Maretron has very high quality parts. A little pricey, but you get what you pay for! Good stuff!

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Maretron is a good vendor for ship monitoring and control systems, and N2K cabling and diagnostics. I have considered their gateways in the past but now I would go with VP Easy Connect, especially for newer VP engines with EVC, for compatibility.

I just check their site at https://www.maretron.com/index.php and noticed two things. First, Maretron was consolidated with Carling Technologies, the manufacturer of Chaparral OEM helm switches and other electric switching and control goodies. Second, Maretron is the true NMEA 2000 certified vendor now.  For the longest time they had refused to pay the outrageous licensing fees to NMEA and called their NMEA 2000 goodies simply N2K complaint. This is where the N2K moniker comes from.

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1 hour ago, Rambo said:

Maretron is a good vendor for ship monitoring and control systems, and N2K cabling and diagnostics. I have considered their gateways in the past but now I would go with VP Easy Connect, especially for newer VP engines with EVC, for compatibility.

I just check their site at https://www.maretron.com/index.php and noticed two things. First, Maretron was consolidated with Carling Technologies, the manufacturer of Chaparral OEM helm switches and other electric switching and control goodies. Second, Maretron is the true NMEA 2000 certified vendor now.  For the longest time they had refused to pay the outrageous licensing fees to NMEA and called their NMEA 2000 goodies simply N2K complaint. This is where the N2K moniker comes from.

 

22 hours ago, Rambo said:

 

@Iggy It's interesting how this old topic went live again thanks to a spammer.

@Curt It might be worth starting a new topic documenting your case. Some comments on the exchange of ideas quoted below.

Just my opinion regarding the electronics, stay with the brands you already have, VP and Garmin. The Yacht Devices is an innovative company often ahead of its peers and I am using one of their devices but only because I had no other choice then. Nothing wrong with that company but you really do not need one more brand in the electronics mix - KISS - as much as possible. Than more different brands you mix, each with their own interpretation and implementation of standards and own software or firmware update schedule, than more problems you will have over time. Despite the cross brand comprehensive testing the things not always work as intended by non-OEM small player like Yacht Devices.

The N2K cabling is nonissue, you can go with Garmin to keep things uniform and pay a bit extra, or with any other reputable N2K cabling vendor. Just keep in mind that not all of them have marine background and awareness of other NMEA and ABYC standards. I saw some strange "marine" stuff coming from China that I would never install in my boat.

To get you started on designing your own N2K boat network:

Technical Reference for Garmin NMEA 2000 Products (2012 - old but still good)
https://static.garmin.com/pumac/Tech_Ref_for_Garmin_NMEA2k_EN.pdf

Garmin Support - NMEA 2000 Troubleshooting
https://support.garmin.com/en-CA/?faq=656KiuIo733b27xQgmLBy7

 

 

 

 

 

 

I re-read this post again. In the past I have mixed brands with mixed results....   I once mixed Garmin & Lawrance, Garmin was more helpful but Lawrance was faulting Garmin

But if you look at Y.D. and the way Volvo does it. Well, this is my 3rd year using Y.D. gateway. So far everything has worked, I can read everything that my gauges can and more. It was a simpler install, less cabling, less parts to go wrong, less in $$$, and a 5 minute install.  Firmware updates is a simple Micro SD card. In this case with Y.D. it must work. There can be no finger pointing! As you said "innovative".

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