BECKHOFF AX5805 Permitted motors - Manual (Page 8)

System description
6 AX5805
2 System description
By integrating safety technology into its drive technology, Beckhoff has extended the TwinSAFE system
philosophy into the drive in a manner consistent with existing TwinSAFE products. TwinSAFE enables
integrated safety automation, ranging from digital inputs and logic systems to drives and digital outputs.
Simple diagnostics and easy to use functions help the user implement the required application quickly and
safely.
Significant hazards to persons arise from the dynamic movements of the electrical drive equipment of
machines. Controlling these hazards while achieving smooth production flow can be a significant challenge.
The Beckhoff servo amplifiers from the AX5xxx series become fully-fledged safety drives with the addition of
the AX5805 TwinSAFE drive option card.
The option card is able to completely remove torque from the motor or monitor speed, position and direction
of rotation (in accordance with EN ISO 13849-1:2006 to PL e). No further circuits such as circuit breakers,
contactors in the supply lines, or special encoder systems are necessary for this functionality.
This enables a lean installation and helps to lower costs and cabinet space. No special encoder system is
required in order to implement the SDI (Safe Direction) or SLS (Safely Limited Speed) functions. All of
Beckhoff’s motors listed in the document ‘AX5805 – List of permissible motors’ can be used without further
expenditure and without additional encoder systems for these functions. Even safe position monitoring or
position range monitoring is simple to implement with the aid of the AX5805 safety option card.
Adding the AX5805 does not require any additional wiring, since EtherCAT communication is used in the
AX5xxx basic controllers. The AX5805 TwinSAFE drive option card is a self-contained EtherCAT Slave and
communicates directly via the AX controller with a TwinSAFE logic terminal existing in the network.
Figure 1: TwinSAFE system overview