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Unformatted text preview: to occur during switching on. These may be above the permissible operating voltage
of the proximity sensor used and can lead to its failure.
A simultaneous "connecting to ground" of the normally open and normally closed
contact can also lead to failure. To provide short-circuit protection, the output of the
proximity sensor is pulsed. With simultaneous "connecting to ground" of the two
inverted outputs, the short circuit is constantly cancelled on one output and created
again on the other. This causes overloading and thus failure of the proximity sensor. © Festo Didactic GmbH & Co. KG • FP 1110 263 16. Solutions Exercise 6.6 Filling level measurement by means of optical proximity sensors
1. Through-beam sensors, retro-reflective sensors, through-beam sensors with
2. yes ∆h α Fig. 16.5.2: Response accuracy The proximity sensor responds when the height of the filling level is within a certain
range. The width of the response range ∆h is depende...
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