Failure of the emitter is evaluated as object present

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Unformatted text preview: electrical connections are required. • Cannot be used for completely transparent objects. © Festo Didactic GmbH & Co. KG • FP 1110 79 6. Optical proximity sensors Notes • In the case of transparent objects, it is possible to reduce the emitter power by means of the built-in potentiometer to the extent where the receiver is deactivated if the object enters the light beam. • Failure of the emitter is evaluated as "object present" (important with accident prevention applications). 6.2.4 Examples of application Fig. 6.2.3: Checking for broken drills by means of a through-beam sensor 80 © Festo Didactic GmbH & Co. KG • FP 1110 6. Optical proximity sensors 1 2 Through-beam sensor, Emitter (1) Through-beam sensor, Receiver (2) Fig. 6.2.4: Accident prevention on a press by means of a through-beam sensor Safety barriers must comply with the accident prevention regulations of the employer's liability insurance associations. Equipment must be constantly selfmonitoring and tes...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.

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