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Problem of lost feedback signal from programmable valve

2020-03-17View Original

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The on-site feedback switch uses Westlock (NAMUR signal) and is connected via flame-retardant cables to a P+F brand KCD2-SR2-EX2 safety barrier. In actual operation, when the valve reaches its intended position, the system fails to receive any feedback – what could be the reason? Is it related to the optional flame-retardant cable?

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