What is the Safe Torque Off (STO) Feature in the Rockwell Automation PowerFlex 525 Variable Frequency Drive?

Safe Torque Off (STO) is a feature in variable frequency drives that removes torque from the motor when activated, ensuring safety during operation.

This video explains the Safe Torque Off (STO) feature on the Rockwell Automation PowerFlex 525 Variable Frequency Drive, which ensures safety by immediately halting motor motion without removing power from the drive. STO integrates into safety control systems and complies with several safety standards, such as EN ISO 13849 and IEC 61508. The video demonstrates how to configure STO by connecting the drive to a safety circuit, ensuring proper wiring, and testing safety channels. The setup includes both coast-to-stop and controlled stop actions, showcasing the effective functionality of Safe Torque Off in industrial applications.