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Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
17
Chapter
2
Safety Concepts
This section describes the safety Performance Level concept and explains how
the 450L safety light curtains meet the requirements for SIL 3 and PLe for
Category 4 architectures.
Safety Standards Applied to
GuardShield
The 450L safety light curtain satisfies applicable requirements in the following
standards that are related to functional and machinery assembly:
•
IEC 61496-1/-2 (Type 4)
•
IEC 61508 (SIL 3)
•
IEC 62061 (SIL CL 3)
•
EN/ISO 13849-1 (Performance Level e (PLe), Category 4)
•
UL 508
The 450L-E safety light curtain satisfies applicable requirements that are
provided in IEC 60825-1 for the integrated laser alignment aid (see
Published dates of the individual standards are given in the Declaration of
Conformity (see
).
Functional Safety Data
The functional safety data are listed in
to the longest light curtain system length (1950 mm [76.77 in.]) with the
smallest resolution (14 mm[0.55 in.]).
For cascaded 450L-E safety light curtain applications, the final PFH value of
the complete system is the sum of the individual PFH values of each pair plus
the sum of the PFH values of the cascading plug-in.
The following example (
) shows the calculation of the PFH of a
cascaded system with 450L-E safety light curtain and two cascading plug-ins.
Figure 8 - Example and PFH Calculation of Cascaded Systems
PFH (total) = 3x PFH (450L pair) + 2 x PFH (cascading plug-in)
IMPORTANT
For 450L-E safety light curtains, if cascading the PFH of each cascade
and each cascading plug-in must be considered.
Pair 1
Pair 2
Pair 3
Cascading
Plug-in 1
Cascading
Plug-in 2
Содержание Allen-Bradley 140M
Страница 8: ...8 Rockwell Automation Publication 450L UM001F EN P March 2022 Table of Contents Notes ...
Страница 20: ...20 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 2 Safety Concepts Notes ...
Страница 108: ...108 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 7 Status Indicators and Troubleshooting Notes ...
Страница 114: ...114 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 8 Safety Instructions Notes ...
Страница 184: ...184 Rockwell Automation Publication 450L UM001F EN P March 2022 Appendix B Typical Installations Notes ...
Страница 190: ...190 Rockwell Automation Publication 450L UM001F EN P March 2022 Index ...
Страница 191: ...Rockwell Automation Publication 450L UM001F EN P March 2022 191 GuardShield Safety Light Curtain User Manual ...