Measuring speeds is an increasingly important requirement in machines and systems. They are used to reach certain positions quickly and safely. The drives are precisely controlled. It is usually possible to travel quickly between the end points - for example, in the case of a crane. When the target point is approaching, the speed is reduced. Servo drives with integrated sensors can perform this task. In many cases, however, a separate encoder must be used. Especially when it comes to safety-oriented applications in which additional position and speed detection by functionally safe sensors is required. It serves to protect the environment, people and machines.