Restrictions

  • Note that if the drive does not have a mechanical brake or if the brake is defective, the drive may coast to a halt (depending on the friction and mass moment of inertia of the system). In the event of regenerative loads or with axes that are loaded with gravitational forces or driven externally, the drive can even accelerate. This must be taken into account in a risk assessment of the system/machine. Additional safety measures might have to be implemented (e.g. safety brake system).
  • The drive unit cannot be used without an additional brake system for application-specific safety subfunctions that require active deceleration (braking) of the dangerous movement.
  • When using the SS1-t function as described in chapter "Functional safety" > "Integrated safety technology" > Safety subfunctions, the deceleration ramp of the drive is not monitored with respect to safety. In the case of an error, the drive might not be decelerated during the delay time, or it might even be accelerated in the worst case. In this case, the STO function is only activated after the set time delay has expired. The resulting hazard must be taken into account in the risk assessment of the system/machine. Additional safety measures might have to be implemented.
  • The STO function cannot prevent a possible jerk or DC braking.

WARNING

The safety concept is suitable only for performing mechanical work on driven system/machine components.
Severe or fatal injuries.
Hazardous voltages are present in the connection box when the STO signal is disconnected.
  • Before working on the electric part of the drive system, disconnect it from the supply voltage using an appropriate external disconnecting device, and secure it against unintentional reconnection to the voltage supply.

WARNING

Electric shock due to incompletely discharged capacitors.
Severe or fatal injuries.
  • Observe a minimum switch-off time of 5 minutes after disconnecting the power supply.

INFORMATION

The brake and DynaStop® are not safety-related. If the parameter Apply brake/DynaStop® in STO state (Index 8501.3) is enabled, the following happens when the STO function is triggered:
  • The brake is applied.
  • DynaStop® is activated.