The safe operation of machines often requires safety functions to limit speeds, directions of rotation or axis positions. The new device variant PRO of the Servo Drive COMBIVERT S6 from KEB Automation supports the implementation of encoderless safety. Thus safe solutions can be realized for example in applications where no encoder signal is necessary or possible. Encoderless safety functions in the drive offer besides more individual machine concepts cost-efficient possibilities for simple motion monitoring. The COMBIVERT S6 is a modern, compact and at the same time flexible servo controller for a rated current of 2.6 A to 12 A in two housing sizes. The direct mains connection is available for 230 V and 400 V networks. It offers highest performance to meet extended requirements for capacity, communication and integrated safety. The safe configuration of the COMBIVERT S6 is carried out with the certified Safety Editor, which is integrated in the software tool COMBIVIS 6. Here, various safety functions such as SLA (Safely-Limited Acceleration), SLS (Safely-Limited Speed) and their flexible limit values can be set in eight indices.