1 3 2 4 active zones 1 2 counting direction 3 idle

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Unformatted text preview: ondingly large standard calibrating plates or correspondingly large object surfaces. 15.1.7 Inductive proximity sensors with high switching frequency Inductive proximity sensors generally have a maximum switching frequency which is in the range between 500 Hz and 5 kHz, whereby the smaller designs operate at the highest frequencies. Large designs with switching distances in excess of 20 mm can have switching frequencies of less than 50 Hz. High switching frequencies are for instance required for the sensing of fast rotating parts. Products are available with switching frequencies of up to 20 kHz. © Festo Didactic GmbH & Co. KG • FP 1110 231 15. Special designs and variants of proximity sensors 15.1.8 Inductive proximity sensors with idle return function Directional inductive sensors have two adjacent active zones. If an object passes these two zones, then the proximity sensor only registers the object moving in a certain direction, but not in the opposite direction. The basic requirement for this is that the object to be sensed fully traverses the active zones both in the counting and...
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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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