A b 4 i r v 1 2 a area with explosion hazard 3 5 b

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Unformatted text preview: Co. KG • FP 1110 225 15. Special designs and variants of proximity sensors 15.1.1 Example of a universal two-wire design: Quadronorm by IFM With the QUADRONORM inductive two-wire DC proximity sensor, 4 output functions can be accomplished in one proximity sensor: WH BK V a) WH BK V b) BK WH V c) BK WH V d) a) Normally open contact, negative switching b) Normally open contact, positive switching c) Normally closed contact, negative switching d) Normally closed contact, positive switching Fig. 15.1.1: Two-wire proximity sensor 226 © Festo Didactic GmbH & Co. KG • FP 1110 15. Special designs and variants of proximity sensors 15.1.2 Proximity sensors for use in installations with explosion hazard Special proximity sensors are available for use in areas with explosion hazard, which conform to DIN Standard 19 234. This type of proximity sensor is also known as a NAMUR switch (NAMUR is an abbreviation for the German Standards Committee for Measuring and Control Technology in the Chemical Industry, Working Group for Contactless Controllers). a) b) 4 I R V 1 2 a) Area with explosion hazard 3 5...
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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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