EN 50129 applies to safety-related electronic systems (including subsystems and equipment) for railway signalling applications. The standard applies to generic systems (i.e. generic products or systems defining a class of applications), as well as to systems for specific applications.
This standard applies only to the functional safety of systems. It does not deal with other aspects of safety such as occupational health and safety of personnel or potential threats created by the technology regardless of their intended functions (e.g. presence of sharp edges, presence of electric voltage, presence of combustible material). Cybersecurity aspects of functional safety are addressed only to the extent consistent with the application of the relevant standards, where needed.
EN 50129 applies to all the phases of the life cycle of a safety-related electronic system, focusing in particular on phases from 4 (specification of system requirements) to 10 (system acceptance) as defined in EN 50126-1:2017. Requirements for systems which are not related to safety are outside the scope of this document.
EN 50129 applies primarily to systems, subsystems or equipment which have been specifically designed and manufactured for railway signalling applications. It is also applicable to general-purpose or industrial equipment (e.g. power supplies, display screens, or other commercial off the shelf items) which is procured for use as part of a safety-related electronic system.
This standard is for railway duty holders, railway suppliers and assessors as well as at safety authorities, although it does not define an approval process to be applied by the safety authorities.
