this post was submitted on 01 Nov 2025
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Can bus computer burnt out (infosec.pub)
submitted 1 week ago by Aussiemandeus@aussie.zone to c/askelectronics@discuss.tchncs.de
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This is what's known as a Master 4 module in a LHM550 Liebherr harbour crane.

Earlier this week it was hit by lightning causing the module to output a combined 8 volts out on the can line 3 circuit.

The rest of the module works fine, all functions work except anything related to can line 3.

Can line 3 output is the 2nd white plug port on the top left of the photo.

I know it's probably a long shot but does anyone have any familiarity with these kinds of things?

I have added a couple more photos in the comments.

I couldn't visually see any sort of obvious fail point.

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[–] Aussiemandeus@aussie.zone 9 points 1 week ago

Yeah already done that and a second module at a cost of 17k for the two.

Was just an exercise in curiosity really since they get hit once or twice a year