Motorized actuators with stroke display, KNX. Actuator for continuous valve control. Fully automatic valve stroke detection. Two inputs for, for example, window contacts or presence detectors, and five LEDs to display the valve stroke. Forced positions selectable, for example, in case of controller failure. Valve adapter for common valves included in the delivery. Key for locking (vandal protection). The device is programmable via KNX ETS or KNX easy.