Re: CAN bus over COAX

On Feb 7, 4:33 am, Jim Granville <no.s...@xxxxxxxxxxxxxxxxxxxxxx>
wrote:
stijnvanorb...@xxxxxxxxxxx wrote:
Today a client asked me if we could run our CAN bus over a 75 Ohm
Coax, but i couldn't find a yes/no answer on the spot. So before
buying some coax:

I thought remembering that a coax (or other transmision line) works
because the return path is 180 degrees out of phase, so the coax thus
not radiat when properly terminated (Please correct me if this is over
simplified)

A CAN or other differential bus cancels out any common mode signals,
but if the coax shield of  is not grounded, this would work also..

Any pittfals here ? Would coax impedance cause a problem ? Or maybe
any other suggestions on going from twisted pair to coax..

Stan

CAN bus is OR-wired, but appart from supporting that, the exact
media does not matter.
I'd say it is doable, but the industry standard CAN transciever
chips do not target CoAx drive - so you will need to roll something
custom.

-jg- Hide quoted text -

- Show quoted text -

NO, CAN BUS IS NOT OR - WIRED. ITS AND-WIRED. YOU ARE WRONG MR. JG
.

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