Requirements on the installation

  • The wiring technology used must comply with the standard EN 60204-1.
  • The STO control cables must be routed according to EMC guidelines and as follows:
    • Shielded cables must be permanently (fixed) installed and protected against external damage, or equivalent measures must be taken.
    • Adhere to the regulations in force for the application.
    • The STO control cables from the external safety device to the axis must be installed with a cable length ≤ 100 m.
    • The user must take suitable measures to ensure that STO control cables are routed separately from the power lines of the drive. This does not apply to cables approved by SEW‑EURODRIVE specifically for this application case.
  • The STO function does not detect short circuits or interference voltage in the supply line. For this reason, one of the following 2 requirements must always be met:
    • No parasitic voltages can occur in the STO control cables.
    • The external safety controller can detect a crossfault from an external potential to the STO control lines.
  • Observe without fail the values specified for safety components when designing the safety circuits.
  • The STO signal (F_STO_P1, F_STO_P2, and F_STO_M) must not be used for feedback.
  • For safety controllers/safety relays, you must only use grounded voltage sources with protective electrical separation (PELV) in accordance with EN 61131-2 and EN 60204-1.
  • If several voltage sources are used, each voltage source must be connected to a PE system.
  • When planning the installation, observe the technical data of the devices.
  • The supply voltages 0V24 V_OUT and 24V_OUT of the device may only be used to supply the STO input. The cable length must not exceed 30 m.
  • This connection variant is not permitted for STO group disconnection.
  • When the STO control cables are routed into the connection box to terminal X9 of the connection unit, the cable ends must be covered with conductor end sleeves and the cables must be fixed close to terminal X9 using cable ties. Other low-voltage signals can be bundled together with the STO signals.
  • To use the drive unit in safety-related applications, remove the jumpers labeled with "Caution, remove jumper for safety operation" from the STO terminal X9. No labeled jumpers are available for those designs where the STO connection is performed using plug connectors. The installed jumper is relevant to the function.