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EN/IEC 61496-1

EN/IEC 61496 “Safety of machinery – Electrosensitive protective equipment – Part 1: General requirements and tests" establishes a clear relationship between type classes for electrosensitive protective equipment (ESPE) and the Safety Integrity Level (SIL – in accordance with IEC 62061) / Performance level (PL – in accordance with ISO 13849). This relationship is defined as follows:

For use in applications in accordance with Type 1 Type 2 Type 3 Type 4
EN ISO 13849-1   PL c PL d PL e
EN/IEC 62061   SIL 1 and
SIL CL 1
SIL 2 and
SIL CL 2
SIL 3 and
SIL CL 3

Type 2 light curtains must therefore be used only in applications with performance level c. Type 3 devices are assigned to Performance Level d and Type 4 devices may continue to be used in Performance Level e. If a machine's risk assessment results in a safety function with PL = d, then Type 3 light curtains are required (PSENopt II). This change is legally binding from 10. May 2015.


How does this standard affect the light barriers PSENopt from Pilz?

Depending on the requirement, the light barriers PSENopt provide finger, hand and body protection in accordance with EN/IEC 61496-1 and are suitable for all applications in accordance with Type 2, Type 3 and Type 4. The table below provides an overview of the product range and the corresponding SI level and performance level:

Type PSENopt PSENopt Advanced PSENopt II PSENopt slim
Resolution

Hand and body protection, access protection

Finger and hand protection Finger, hand and
body protection
Finger and hand protection
Approved in accordance with
EN/IEC 61496-1/-2
(PSENopt II:
EN/IEC 61496-1)
Type 2 Type 4 Type 2 Type 4 Type 3 Type 4 Type 2

Type 4

Can be used in applications in accordance with EN ISO 13849-1 EN/IEC 62061 PL c
SIL CL 1
PL e
SIL CL 3
PL c
SIL CL 1
PL e
SIL CL 3

PL d
SIL CL 2

PL e
SIL CL 3

PL c
SIL CL 1

PL e
SIL CL 3

Functions/features Feedback loop monitoring, reset, acknowledge, diagnosis

Feedback loop monitoring, reset, acknowledge, diagnosis and muting, blanking, cascading

Diagnostics, no dead zones, high robustness, compatible connections PDP67, coding, simple wiring

Feedback loop monitoring, diagnostics, cascading

 
Further information:

 

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