CEI EN 60947-5-3

BILINGUAL

This part of IEC 60947 series provides additional requirements
to those given in IEC 60947-5-2. It addresses the fault performance
aspects of proximity devices with a defined behaviour under fault
conditions (PDDB). It does not address any other characteristics
that can be required for specific applications.

This standard does not cover proximity devices with analogue
output.

This Standard does not deal with any specific requirements on
acoustic noise as the noise emission of control circuit devices and
switching elements is not considered to be a relevant hazard.

For a PDDB used in applications where additional
characteristics, dealt with in other standards, are required, the
requirements of all relevant standards apply.

The use of this standard alone does not demonstrate suitability
for the implementation of any specific safety related
functionality. In particular, this standard does not provide
requirements for the actuation characteristics of a PDDB, or for
means to reduce the effects of mutual interference between devices,
e.g. coded targets. Therefore these and any other
applicationspecific requirements will need to be considered in
addition to the requirements of this standard.

NOTE 1 Due to their behaviour under fault conditions, PDDBs can,
for example, be used as interlocking devices (see ISO 14119).

NOTE 2 The requirements for electro-sensitive protective
equipment for the detection of persons are given in the IEC 61496
series.