Re: Practical setup of the CAN physical layer in automobiles

>> In fact that's the way it is done.
But how can a star network be possible with a serial CAN bus protocol ?

Regards,
Dinesh

On Thu, Apr 11, 2013 at 8:14 PM, Tom <[email protected]> wrote:

> SC> I am currently working with a vehicle prototype where all CAN
> SC> lines are connected in a star point.  I cannot imagine that this
> SC> is the way it would be done in a mass production vehicle.
>
> In fact that's the way it is done.
> Some have two stars - one in front other at the back.
> As many as 8 pairs in one place.
>
> Some have mixed connections.
> Nodes are conected in series - two pairs into one socket, but on
> some nodes there is more than just two. Junction is made in a plug.
>
> I'm talking about cars like those from top from Germany.
> They have a lot of nodes, but not only on one CAN BUS.
>
> "Regular" cars have much less modules.
>
> Tom
>
>
> W liście z 11 kwietnia 2013:
> From: [email protected]
> To: [email protected]
> CC:
>
> SC> Hello,
>
> SC> Literature on the CAN bus usually only explains how the CAN bus
> SC> should work in theory, but I am wondering how the physical layer
> SC> of the CAN busses in automobiles is actually implemented in real cars.
>
> SC> I am currently working with a vehicle prototype where all CAN
> SC> lines are connected in a star point.  I cannot imagine that this
> SC> is the way it would be done in a mass production vehicle.
>
> SC> On the other hand, a line structure would require some kind of
> SC> T-junction connectors. Another possibility would be to place the
> SC> junction inside of the control units, but that would require two
> SC> pairs of CAN lines to be fed into the control units.
> SC> I have never seen neither this nor that in automotive wiring harnesses.
>
> SC> Can someone with practical experience tell me, how the CAN wiring
> SC> in series cars is actually set up?
>
> SC> Thank you in advance,
> SC> Christian
>
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