EN 41003 : besondre sicherheitsanforderungen an gerate zum anschlub an fernmeldenetze / Europaisches Komitee Fur Elektrotechnische Normung
EN 41003 : particular safety requirements for equipment to be connected to telecommunication networks / European Commitee for Electrothecnical Standardization
EN 50008 : low voltage switchgear and controlgear for industrial use. Inductive proximity switches. Form A, for direct current, 3 or 4 terminals / European Commitee for electrothecnical Standardization
EN 50010 : low voltage switchgear and controlgear for industrial use. Inductive proximity switches. Methods for measuring the operating distance and operating frequency / European Commitee for electrothecnical Standardization