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I/O and Fusing - Each Card or Each Point?


I recently inherited a job in the water treatment business. It looks like the previous system designer fused EVERY SINGLE input and output point. This is overkill right? I have never ever fused each point. My design practice has always been to fuse each branch circuit or maybe even each card, but never every point.

What do you do? I know my practice is sound, but I'd like some feedback. I just think this is a HUGE waste of panel space.

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Both scenarios are valid, depending on the requirements. Fusing every IO is more robust, because a single failure will not take down the entire branch.

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