scope:

The provisions of the general rules in IEC 60947-1 are applicable to this document, where specifically called for. General rules clauses and subclauses thus applicable, as well as tables, figures and annexes, are identified by references to IEC 60947-1, e.g. subclause 7.1.9.3 of IEC 60947-1:2007 or Annex C of IEC 60947-1:2007, IEC 60947-1:2007/AMD1:2010. Clauses 1 to 9 contain the general requirements. Additional information for the various types of proximity switches are given in Annex A. This part of IEC 60947 applies to inductive and capacitive proximity switches that sense the presence of metallic and/or non-metallic objects, ultrasonic proximity switches that sense the presence of sound reflecting objects, photoelectric proximity switches that sense the presence of objects and non-mechanical magnetic proximity switches that sense the presence of objects with a magnetic field. Products covered by the scope of this standard are not subjected to defined behaviors under fault conditions. Proximity switches with defined behavior are covered by IEC 60947-5-3 and have to fulfil additional requirements. These proximity switches are self-contained, have semiconductor switching element(s) and are intended to be connected to circuits, the rated voltage of which does not exceed 250 V 50 Hz/60 Hz AC RMS or 300 V DC.