Victron VE CAN to NMEA 2000

[marcot]

ok many thanks

 

[PaulRainbow]

ok many thanks

Please post back with the result.

 

[marcot]

Please post back with the result.

Paul, i'm not on my boat, but in one month I'll be back there and will post the feed-back

 

[marcot]

Paul,
when I connected the cable, the N2K fuse blow off (twice).
short circuit somewhere?

 

[PaulRainbow]

Paul,
when I connected the cable, the N2K fuse blow off (twice).
short circuit somewhere?

You must have wired it wrong, the fuse should not blow if you're only connecting the 2 data wires.

 

[Baggywrinkle]

Paul,
when I connected the cable, the N2K fuse blow off (twice).
short circuit somewhere?

Is your GX device VE-Can port correctly configured to talk NMEA? Have you used the galvanically isolated Can port?

Info here ....

Marine Integration Guide [Victron Energy]

3.4 DC Voltage compatibility​

The Victron VE.Can network accepts 9 to 70VDC.
The NMEA-2000 network used to be 9 to 16VDC, which is, or will be, expanded to also include 24V. Which means that some NMEA-2000 devices are 9 to 16VDC, some are 9 to 30VDC, and some allow higher voltages.
Also, the Victron VE.Can network will (in most cases) be powered with battery voltage. So for a 48V system, the voltage on the VE.Can network exceeds the NMEA-2000 accepted voltage levels.
Therefore, it is important to not connect those power cables.
The Victron cable used to connect both networks together, the VE.Can to NMEA 2000 cable, has a removable fuse which is to be removed in case separation is necessary. A printed warning label is attached to the cable to warn about this.

3.5 Galvanic isolation​

When connecting a GX to an NMEA 2000 network, it is recommend to do so using a galvanically isolated CAN-Bus port.
This is especially the case when your NMEA backbone and GX are powered from separate power sources or do not share a common ground. These are the two most popular models that feature such galvanically isolated port:

• Cerbo GX MK2 (launched in 2024 as a successor to the Cerbo GX which did not feature an isolated port)
• Ekrano GX

On both above products, VE.Can port 1 has galvanic isolation. VE.Can port 2 does not.
For a full list of which ports feature isolation, see this document.

 

[Daverw]

Make sure you don’t use the included power feed for the Victron adapter, just l ave the inline fuse out

 

[Baggywrinkle]

Make sure you don’t use the included power feed for the Victron adapter, just l ave the inline fuse out

It's a home made cable.

 

[marcot]

It's a home made cable.

yes diy cable. I'm using Cerbo MK2, correctly configured and used the correct port.
will do another cable next time I will be on the boat

 

[PaulRainbow]

This thread is for a DIY cable and clearly states in post #1 not to connect the power wires. It's a simple two wire connection for the data.

Post #40 give the only two connections that should be made. If those two connections are made the fuse cannot possibly blow.

 

[lustyd]

Finally added the NMEA/CAN cable to my Cerbo today, thanks Paul this is very good. Alongside finally realising that the Cerbo GX was compatible with my fuel sender with just a couple of wires this has added some good functionality. I still think the HTML app on the plotter adds a lot of value but the NMEA integration is very good.
Now I'm looking into whether I can actually make custom dashboards on a Navico platform as the built in ones are very limited but at least we now have fuel and battery remaining at the helm.

 

[PaulRainbow]

Finally added the NMEA/CAN cable to my Cerbo today, thanks Paul this is very good. Alongside finally realising that the Cerbo GX was compatible with my fuel sender with just a couple of wires this has added some good functionality. I still think the HTML app on the plotter adds a lot of value but the NMEA integration is very good.
Now I'm looking into whether I can actually make custom dashboards on a Navico platform as the built in ones are very limited but at least we now have fuel and battery remaining at the helm.

I already had the fuel gauges connected to an Actisense EMU1, so left them there, but i did connect the water tank sender to the Cerbo, works really well. At some point i'll look into moving the fuel senders to the Cerbo too, which will give me a couple of free inputs, would like to get EGT on the MFDs. The Garmin dashboards are OK, although i wouldn't mind looking into being able to make custom ones.

 

[Daverw]

I have fuel and water on plotter at the moment, really useful, both on B&G Vulcan within the instrument screen, I’ve just added charging state and battery stuff just for fun as don’t really need that as it’s all on the cerbo anyway. My winter project is to try and get engine run hours onto the cerbo and then to the plotter, I’m looking at using dc/dc charge status to indicate engine running. Got my head down into node red and signal K at the moment

 

[lustyd]

as it’s all on the cerbo anyway.

Sadly we don’t have a screen for the cerbo so it’s either plotter or remote console. I kinda want one but can’t justify the extra expense or power

 

[Daverw]

I’ve been told that you can run the Victron app on the plotter if you connect via Ethernet to the cerbo

 

[lustyd]

I’ve been told that you can run the Victron app on the plotter if you connect via Ethernet to the cerbo

Not quite (on Navico). There’s an html interface but it isn't the same as the normal interface.

 

[PaulRainbow]

Sadly we don’t have a screen for the cerbo so it’s either plotter or remote console. I kinda want one but can’t justify the extra expense or power

Do you use the VRM?

 

[lustyd]

Do you use the VRM?

Occasionally but usually just use the app locally on my phone as it’s convenient

 

[lustyd]

Well that was unexpected, but quite clever!

 

[PaulRainbow]

Well that was unexpected, but quite clever!
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