Abstract: An electronic blocking unit for adding to a manually operateable locking device in particular a mortise lock, to provide a manually and electronically operateable locking system. The electronic blocking unit includes a blocking element, which is moveable between a blocking position and a non-blocking position, a drive mechanism for moving the blocking element, a control unit for operating the drive mechanism and a power supply for operating the control unit and the drive mechanism. The blocking element is constructed in such a way that in the blocking position it blocks an opening of a door, a window or the like and in the non-blocking position it does not block the opening of the door, the window or the like. A locking system of a door, a window or the like is formed by a manually operateable locking device and an electronic blocking unit.

Abstract: An electronic unit for adding to a manually operated locking device, in particular a mortise lock, to provide a manually and electronically operable locking system. The electronic unit includes a motor, gearing elements that can be operated by the motor the gearing elements configured to couple the motor to and to operate an opening and closing mechanism of the locking device connection elements for connecting the gearing elements of the electronic unit with the opening and closing mechanism and a control unit for operating the motor of the electronic unit. The gearing elements are built in such a way that during a manually operation of the locking system the motor is decoupled of the opening and closing mechanism.