BS EN 50129:2018 PDF Download

BS EN 50129:2018 is a standard that pertains to safety-related electronic systems used in railway signaling applications. It covers both generic systems, which define a class of applications, as well as specific systems for particular applications. The scope of the standard is focused solely on the functional safety of the systems and does not address aspects like occupational health and safety.

The standard applies to all phases of the life cycle of a safety-related electronic system, with a particular emphasis on phases 5 to 10 as defined in EN 50126-1:2017, which include architecture and apportionment of system requirements to system acceptance. It does not cover requirements for systems unrelated to safety, and it does not apply to existing systems, subsystems, or equipment that were accepted prior to the creation of the standard, except for modifications and extensions.

The standard is primarily applicable to systems, subsystems, or equipment that have been specifically designed and manufactured for railway signaling applications. However, it should also be applied, where reasonably practicable, to general-purpose or industrial equipment procured for use as part of a safety-related electronic system. In such cases, evidence should be provided to demonstrate that the equipment is either not relied upon for safety or that it can be relied upon for safety-related functions.

The intended audience for this standard includes railway duty holders, suppliers, and assessors, as well as safety authorities, although it does not prescribe an approval process for safety authorities to follow.