Allen-Bradley PowerFlex 527, User Manual

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Rockwell Automation Publication 520-UM002B-EN-E - December 2017 87
Chapter
4
PowerFlex 527 Integrated Safe Torque-Off
This chapter introduces you to how the PowerFlex® 527 integrated safe torque-off
feature meets the requirements of Performance Level e (PLe), Category 3
according to EN ISO 13849, and SIL CL3 according to IEC 61508,
EN 61800-5-2, and EN 62061.
Certification The TÜV Rheinland group has approved PowerFlex 527 drives with integrated
safe torque-off for use in safety-related applications up to PLe, Category 3
according to EN ISO 13849, and SIL CL3 according to IEC 61508, EN 61800-
5-2, and EN 62061, in which removing the motion-producing power is
considered to be the safe state
See CE Conformity on page 36 for more information regarding certification.
Important Safety Considerations
The system user is responsible for the following:
• Validation of any sensors or actuators connected to the system.
• Completing a machine-level risk assessment.
•
Certification of the machine to the desired EN ISO 13849 performance
level or EN 62061 SIL level.
• Project management and proof testing performed in accordance with
EN ISO 13849.
For information on... See page...
Certification 87
Description of Operation 88
Probability of Dangerous Failure Per Hour (PFH) 89
Safe Torque-Off (STO) Feature 89
Out-of-Box (OOB) Safety State 91
Safe Torque-Off Status 93
Explicit Messages 94