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.