Volvo EVC - NMEA2000 - Raymarine C120W connection

[jrudge]

Forum help please.

THe boat has 2 x D6 310s and I have just had the software updated so they will talk to a Volvo Penta NMEA2000Gateway ( PN 3889757)

This in turn now needs to connect to a Raymarine C120W plotter using the Seatalk NG interface.

The issues is that to connect these 2 I seem to need some £170 of cables. A Bus, power cable, terminators, t pieces, and NMAE adaptor.

In my view there must be a simpler way. NMEA2000 is I assume a serial bus, so in basic format I should need to connect power and then the TX to RX and RX to TX I would have thought, not needing £170 of cables.

I have googled Raymarine NMEA2000 etc but looking at the NMEA standard found this http://www.interfacebus.com/NMEA-2000_Standard.html which seems to suggest it can be done with some wires and 2 x 120 ohm resistors.

Does anyone know how to do this please?

THanks as ever

Jeremy

 

[aquapower]

You need a Volvo Y cable, the appropriate Raymarine cables and the gateway. I recently supplied and fitted one and cables were approx £100+vat, depends on length of backbone cable.
Pm me if you need any of this

 

[jrudge]

Thanks. I have the Y EVC cable ... but didnt need it as there was a spare socket under the dash.

I suppose my aim is 10 mins with a soldering iron as opposed to £100 of cables but i could still be tempted. Do you know the part numbers please? The last quote I had was about £170, so £100 is getting better!

 

[jfm]

Forum help please.

THe boat has 2 x D6 310s and I have just had the software updated so they will talk to a Volvo Penta NMEA2000Gateway ( PN 3889757)

This in turn now needs to connect to a Raymarine C120W plotter using the Seatalk NG interface.

The issues is that to connect these 2 I seem to need some £170 of cables. A Bus, power cable, terminators, t pieces, and NMAE adaptor.

In my view there must be a simpler way. NMEA2000 is I assume a serial bus, so in basic format I should need to connect power and then the TX to RX and RX to TX I would have thought, not needing £170 of cables.

I have googled Raymarine NMEA2000 etc but looking at the NMEA standard found this http://www.interfacebus.com/NMEA-2000_Standard.html which seems to suggest it can be done with some wires and 2 x 120 ohm resistors.

Does anyone know how to do this please?

THanks as ever

Jeremy

You can if you want make your own network. A bunch of 5 core cabling, with power supply connected, and resistor across each end of the backbone (which could be 1 inch long in your case...) as set out in the NMEA stnadard. Then you'd need to connect to raymarine's proprietary plugs (because, urgh, they dont use std nmea2000 plugs) which as I recall aren't particulalry field connectable but at least you only need 2 in your proposed set up

I gotta say though it would be much less faffing to use the raymarine parts and they take only 5 mins to stick together

Pity you missed my for sale ad where I sold a bag of this stuff, way more than you need, for buttons. Left over from a big raymarine N2K install on my last-but-one boat

You can buy a lot of raymarine cables on eBay - might be worth a look

 

[jfm]

PS if you use raymarine bits you dont actually need a backbone cable in your particular case, i think. A 5 way block would do. Put resistors in ports 1 and 5, and the power, gateway and C120W in the other 3, and job done. I dont have price list but that's 6 compnents and maybe a bit cheaper? Good luck anyway

 

[aquapower]

You may already have a 5way block with spare way, if you don't need the Volvo y lead then it will only be £50+vat for the Raymarine leads but all depends how far the plotter is from the HCUs. Not sure how you can do this without the y lead as it needs to connect between both HCUs, part nos are in catalogue but not got one with me now.