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What is the difference between pnp and npn proximty switches ?

Electrical Controls Instrumentation
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Question added by Alaa Alsouradi , Service Engineer , Rieckermann services Ltd
Date Posted: 2015/03/11
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khadidja djeriouat
by khadidja djeriouat , assistante maintenance , rocaal

 la difference entre un pnp et un npn  est dans le dopage :pnp est dopé  positivement puis négativement ensuite positivement est inversement pour le npn pour les automates pnp doit avoir une tension positive à l'entrée et le npn  doit avoir une tension négative

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