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2008 Norge...CANbus??

Tony, CAN does NOT require 3 wires. You're free to use a shielded cable, but that's not a requirement - at least not of the CAN protocol I know of (which uses 2 wires on, IIRC, pins 2 and 7 or 5 of a regular DB7 serial line connector).
 
Hi Rene,

We have a standard at work that specifies three wires for CAN - I guess there are multiple implementations of standards everywhere. The good thing about standards is there there is so many to choose from!

Maybe I have got it wrong, too...
 
There are indeed multiple standards, or versions of the protocol ... The one I have worked with used just 2 wires, and possibly multiple connectors in series (and 2 terminator resistances on the 2 end points). Maybe that your document adds a shielding cable?
 
Rene,

I was wrong, you are right - there are only two wires on the CAN bus - don't know where I got the three wires from - probably from one of the projects at work - they confuse me at the best of times...
 
That's all right, can happy to anyone (and usually I'm the one who's wrong on this forum ;) )
 
Nice find.

I'm not sure what the author means with "no hierarchy" - there is one. Messages with lower IDs have higher priority than messages with higher IDs.
 
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