The compact synchronous motors of the HFI series are based on the proven HBI series from ENGEL Elektroantriebe. Compared with their predecessors, the HFIs offer 10 to 15% more power and torque, depending on their size, as well as expanded options for fieldbus communications. These devices can be integrated into many networks, including EtherCAT, CANopen, PROFINET or EtherNet/IP.
The Safe Torque-Off (STO) safety feature is a suitable option for safety-related applications in which general safety hazards or hazards to the machine operator or system must be fully eliminated.
This optional electrical safety feature, which can be installed into any HFI model, includes two redundant channels and meets the SIL-3 criteria under DIN EN 61508. It also reaches performance level [e] Cat 3 under DIN EN 13849. When the safety feature is activated, the current to the actuator is cut within 20 ms, completely stopping the generation or torque as well as preventing hazardous movements of the actuator or corresponding equipment. The STO inputs are also suitable for pulses from OSSD outputs. The means that safety equipment with related diagnostic functions can be directly connected and operated without the use of conventional electromechanical safety switches.
A potential-free status output indicates the status of the safety feature, also enabling the cyclical function test of the two input channels.
The optional STO safety module makes it easy to meet the necessary safety requirements. It eliminates the need for conventional electromechanical switchgear, reduces costs and also frees up space inside the switch box.