TwinSAFE safe drive technology

AX8911 – TwinSAFE card for servo drives of the AX8xxx series

The AX8911 TwinSAFE drive option card is an optional extension of the Beckhoff AX8xxx servo drive series, in which it is permanently installed. The card enables you to define the safety functions by application. The type key of the servo drive determines whether it is a servo drive with STO (AX8xxx-x1xx) or Safe Motion (AX8xxx-x2xx). In the delivery state, a factory setting project with the safety function STO according to EN 61800-5-2 is integrated as an example. Further information can be found in the original operating instructions for the cards.

WARNING

Failure to observe the documentation for the TwinSAFE drive option cards may compromise safety

Only operate the TwinSAFE drive option card for the intended activities defined in the corresponding documentation, taking into account the specified values.

  • Refer primarily to the documentation for the TwinSAFE drive option card.

Axis modules with TwinSAFE Safe Motion

The axis modules are optionally available with integrated safety functions . These conform to IEC 61800-5-2 and fulfill the following safety standards:

Communication takes place via the FailSafe-over-EtherCAT protocol FSoE according to IEC 61784-3-12. When using the factory setting project, the safety function STO can be enabled either via two safe integrated digital inputs or FSoE.

Original operating instructions | AX8911 for AX8xxx-x1xx

TwinSAFE safe drive technology 1:

Direct link to the original operating instructions of the TwinSAFE drive
option card for servo drive AX8xxx-x1xx

Original operating instructions | AX8911 for AX8xxx-x2xx

TwinSAFE safe drive technology 2:

Direct link to the original operating instructions of the TwinSAFE drive
option card for servo drive AX8xxx-x2xx

 

Encoder connection for safe encoders (functional safety)

Original Beckhoff OCT motor cables or encoder cables are available for connecting Beckhoff servo or linear motors with a safe encoder (functional safety) for the implementation of TwinSAFE safety functions.

Notice Only OCT motor cables in which both the OCT wire pair and the brake wire pair are shielded separately may be used.

TwinSAFE safe drive technology 3:

Third-party motors with safety encoders are not covered by the certification

The TÜV SÜD certificate applies to the list of approved components. Other components are not covered by the certificate. When using a third-party motor with a safety encoder, you are responsible for the correct installation of the safety encoder and the correctly assembled encoder connection cable. In addition, an FMEDA (Failure modes, effects and diagnostic analysis) and the necessary EMC and environmental tests must be carried out.

Further Information