Re: CAN Bus protection (100VDC)

StanV wrote:
We designed a machine where we have at some place the CAN-bus signals
and HighVoltage power (100VDC and 220VAC) on the same cable.

So , we are just awaiting a faulty cable or connector to get these
voltages on the bus.

Opto-isoloating every nodes seems to be complex. I also found some new
maxim CAN-driver that is protected upto 80VDC. Unfortunatly we are
unable to change the CAN drivers inside the nodes.

I also found a few other components for protecting a CAN bus , but they
are mostly intended for voltages upto 24V.

In what direction could i look for protection components, or maybe it
is just to difficult to protect the bus for such levels ?

Cost or no cost, I'm not sure opto will even save you. CAN being a 2-wire differential bus, odds are your HT will short to just one of the CAN lines, not both. So now you have up to (almost) 400V *between* the two CAN lines. Opto isolators will contain the damage, but you've definitely lost your CAN transceivers.
.

Relevant Pages

  • CAN Bus protection (100VDC)
    ... maxim CAN-driver that is protected upto 80VDC. ... I also found a few other components for protecting a CAN bus, ... In what direction could i look for protection components, ...
    (comp.arch.embedded)
  • Re: OT: Daniel Craig Riding a Motorcycle In Quantum of Solace
    ... Sounds like the bus designers are not making good use of the size of the vehicle to control acceleration in a crash. ... Making the passenger compartment a "crumple zone" would be a bad idea. ... If it had been a full size bus, the pickup would have gone mostly under the bus, also protecting the occupants. ... No kidding, but lack of occupant injury, other than the driver and aide seems to show that the bus did protect its occupants. ...
    (rec.motorcycles)