Rockwell Automation 21G PowerFlex 750 Series Safe Torque Off - Manual (Page 9)

Rockwell Automation Publication 750-UM002F-EN-P - July 2013 9
Chapter
2
Safety Concept
Introduction This section describes the safety performance level concept and how the
PowerFlex 750-Series drives can meet the requirements for SIL CL3, CAT 3, or
PL e applications.
Safety Certification The PowerFlex 750-Series safety option is certified for use in safety applications
up to and including SIL 3 according to EN 61800-5-2, IEC 61508, and EN
62061, Performance Level PL e and Category 3 according to ISO 13849-1.
Safety requirements are based on the standards current at the time of
certification.
The TÜV Rheinland group has approved the PowerFlex 750-Series safety option
for use in safety-related applications where the de-energized state is considered to
be the safe state. All of the examples in this manual are based on achieving de-
energization as the safe state for typical Machine Safety and Emergency
Shutdown (ESD) systems.
Important Safety Considerations
The system user is responsible for:
• the set-up, safety rating, and validation of any sensors or actuators
connected to the system.
• completing a system-level risk assessment and reassessing the system any
time a change is made.
• certification of the system to the desired safety performance level.
• project management and proof testing.
• programming the application software and the safety option
configurations in accordance with the information in this manual.
• access control to the system.
• analyzing all configuration settings and choosing the proper setting to
achieve the required safety rating.
IMPORTANT When applying Functional Safety, restrict access to qualified, authorized
personnel who are trained and experienced.
ATTENTION: When designing your system, consider how personnel will exit
the machine if the door locks while they are in the machine. Additional
safeguarding devices may be required for your specific application.