Safety subfunctions

The following safety subfunctions can be used.

  • STO (Safe Torque Off in accordance with EN 61800-5-2) by disconnecting the safety-related 24 V supply.
  • If the STO function is activated, the frequency inverter no longer supplies power to the motor for generating torque. This safety function corresponds to a non-controlled stop according to EN 60204‑1, stop category 0.
  • The safety-related 24 V power supply must be switched off by a suitable external safety controller or a suitable external safety relay.
  • SS1-t (Safe Stop 1) – safe stop 1 with time control according to EN 61800-5‑2) by means of suitable control (e.g. safety relay delayed disconnection).
  • Adhere to the following procedure:
    • Decelerate the drive via the setpoint input using a suitable braking ramp.
    • Disconnect the safety-related 24 V power supply (= triggering the STO function) after a specified safety-related time delay.
  • This safety function corresponds to a controlled stop according to EN 60204‑1, stop category 1.