Mechanical cylinders have been used to provide security and control of locks. Increasing demand for higher security, flexibility of master key systems, flow control, copy control of keys, etcetera, have made it desirable to incorporate additional functions to such mechanical cylinders, and new technologies have made it possible to develop electronically controlled cylinders. This European Standard specifies requirements for performance and testing of mechatronic cylinders and their keys and/or electronic keys. It applies to cylinders for such locks designed to be normally used in buildings. It also applies to cylinders for use with other products such as exit devices, door operators, monitoring facilities and alarm systems. It establishes categories of use based on performance tests and grades of security based on design requirements and on performance tests that simulate attack.