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Why is the TEST function in the through beam photoelectric sensors necessary and how is it activated?

April 26, 2017Activated beam function necessary photoelectric sensors Test

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Why is the TEST function in the through beam photoelectric sensors necessary and how is it activated?

1 Answer

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10 Posted

The TEST function allow the user to effect a preventive and autodiagnostic control of the correct sensor functioning without placing the object to detect between the emitter and receiver. The emitter emission is deactivated each time the TEST+ input is connected to the positive power supply, or the TEST- input to the negative power supply, and thus the object’s presence is simulated, provoked the receiver output switching.