This clause of EN 61496-1 is replaced by the following:
This Technical Specification is to be read in conjunction with EN 61496-1:1997. It specifies
requirements for the design, construction and testing of electro-sensitive protective equipment
(ESPE) for the safeguarding of machinery, employing passive infra-red protective devices
(PIPDs) for the sensing function. Special attention is directed to features that ensure an
appropriate safety-related performance is achieved. An ESPE may include optional safetyrelated
functions, the requirements for which are given in Annex A of EN 61496-1.
This Technical Specification does not specify the different means of thermal radiation detection
nor the dimensions or configurations of the detection zone and its disposition in relation to
hazardous parts for any particular application, nor what constitutes a hazardous state of any
machine. It is restricted to the functioning of the ESPE and how it interfaces with the machine.
PIPDs are devices that have a detection zone specified in three dimensions wherein persons or
parts of persons are detected as a result of their thermal radiation.
Excluded from this part are PIPDs operating at wavelengths outside the range 6 μm to 14 μm.
This Technical Specification may be relevant to applications other than those for the protection
of persons, for example the protection of machinery or products from mechanical damage. In
those applications additional requirements may be necessary, for example when materials that
are not intended to be recognized by the sensing function have similar properties to those of
persons.
This Technical Specification does not deal with electromagnetic compatibility (EMC) emission
requirements.