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Advanced loop card short circuit testing
#61
(06-03-2018, 09:37 PM)bob1 Wrote:
(06-03-2018, 07:47 PM)douglas docherty Wrote: Yes, it can be an issue, so we don't
Jeeze, so a device to protect the loop loosing all the points in the event of a wiring short circuit will blow the card and loose all the points !!!. What is the way forward?, opto isolated drivers?.

The two loop cards I blew were while replacing sounders in the middle of the loop.

Funnily enough I've traced loads of actual short circuit faults on advanced and never come across a completely blown loop card caused by one except the 2 times I did it myself. Even then I'm nearly sure I didn't short anything.
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