Professional Development · Trades & Technical Skills · Industrial Installation and Drive Technology

Safety Functions in Drive Systems – STO, SS1 and Performance Level

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This topic explains the integrated safety functions STO (Safe Torque Off) and SS1 (Safe Stop 1) in variable speed drive systems, the Performance Level concept under BS EN ISO 13849-1, and the practical wiring and verification requirements for functional safety compliance.

Inhaltsübersicht

  • Functional Safety in Drive Systems – Concepts and Standards
  • STO – Safe Torque Off: Function, Wiring and Verification
  • SS1 – Safe Stop 1: Controlled Deceleration with STO
  • Practical Safety Circuit Design and Compliance Documentation
BS EN ISO 13849-1 risk graph showing the three parameters S, F and P mapping to required Performance Levels a through e
Pixabay – Pixabay License

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