Allen-Bradley PowerFlex 525 Application Technique page 16

Safety Function: Actuator Subsystems – Stop Category 1 via the PowerFlex 525 and PowerFlex 527 Drives with Safe Torque-off
The two PowerFlex 525 safety functions each achieve their necessary PLr.
When the PowerFlex 527 drive is used in the safety function, "Safety-related stop function initiated by a safeguard, " the
SISTEMA calculation results are as follows.
As before, when the PowerFlex 527 drive is used in the safety function, "Prevention of an unexpected start-up, " the
calculations are identical, because all of the same components are used.
Each PowerFlex 527 safety function achieved its PLr.
16 Rockwell Automation Publication SAFETY-AT140A-EN-P - May 2015