Considerations for safety ratings – Rockwell Automation 21G PowerFlex 750 Series Safe Torque Off User Manual
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Rockwell Automation Publication 750-UM002F-EN-P - July 2013
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Safety Concept
Chapter 2
Considerations for Safety
Ratings
The achievable safety rating of an application using the safety option installed in
PowerFlex 750-Series drives is dependent upon many factors, drive options, and
the type of motor.
For applications that rely on the immediate removal of power to the actuator,
resulting in an uncontrolled coast to stop, a safety rating up to and including SIL
CL3, PL e, and Category 3 can be achieved.
Contact Information if Safety
Option Failure Occurs
If you experience a failure with any safety-certified device, contact your local
Rockwell Automation distributor. With this contact, you can:
• return the device to Rockwell Automation so the failure is appropriately
logged for the catalog number affected and a record is made of the failure.
• request a failure analysis (if necessary) to determine the probable cause of
the failure.