This European Standard specifies requirements for performance and testing of mechatronic cylinders and their original keys and/or electronic keys. It applies to cylinders for such locks designed to be used with cylinders as are normally used in buildings. It also applies to cylinders for use with other hardware products such as exit devices, door operators, etc. or access control systems 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. Corrosion resistance is specified by reference to the requirements of EN 1670 on the protection of corrosion for locks and building hardware. On occasions there may be a need for additional functions within the design of the cylinder. Purchasers should satisfy themselves that the products are suitable for their intended use. This is particularly important when the operation of such additional functions is safety-related. Accordingly, this document includes obligatory assessment of such features when they are included in the cylinder design. This CEN document does not cover any other element of a security system, other than those directly involved in the control of a cylinder. It does not provide for any particular design of products and only such dimensions as are required to satisfy the Essential Requirements of the CPD are specified. It is assumed that MCs will meet the legal EMC regulations concerning electronic apparatus. The suitability of cylinders for use on fire or smoke-door assemblies is determined by fire performance tests conducted in addition to the performance testing required by this CEN document. Annex B indicates additional requirements for these products. Since suitability for use on fire doors is not essential in every situation, the manufacturer has the option to state if the cylinder conforms to these additional requirements or not. If so claimed, the requirements laid down in the relevant European Standard prEN 1634-1 apply, see Annex B.