Application manual for YRB-4EML-31S safety relay
Contrinex AG Industrial Electronics
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4.2
Light curtain (ESPE)
Light curtains
Light curtains consist of a transmit and receive unit and have a two-dimensional
monitoring range. Light curtains are electrosensitive protective elements used to protect
operating personnel working on or in the vicinity of dangerous machines. Compared to
mechanical systems, they offer the advantage of contact-free and therefore wear-free
operation.
Please note the following factors when using light curtains:
– The light curtains must be installed in such a way that it is impossible to access the
protected field from above, below or behind. If this is not guaranteed, additional safety
equipment must be installed.
– The machine control system must be capable of being influenced electrically and
permit dangerous states to be exited immediately in each operating phase.
– The ambient conditions must not adversely affect the effectiveness of the light
protective system.
– Electrosensitive protective equipment (ESPE) does not provide protection from flying
parts.
Relevant standards
EN 61496-1, EN 61496-2: Requirements for electrosensitive protective systems
EN ISO 13855: Positioning of safeguards with respect to the approach speeds of parts of
the human body
