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What is a 3-wire fan ?

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What is a 3-wire fan ?

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It is a fan withrotation signal output to detect the RPM. It is called “tachometer function” or “pulse alarm output”.

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A The third wire in a 3-wire fan measures the rpms of the fan. It is sometimes referred to as a tachometer wire. Our 3-wire case fans are referred to as sensor fans.

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