IEC 62425:2007
轨道交通.通信、信号传输和处理系统.信号传输用与安全性相关的电子系统

Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling

标准号

IEC 62425:2007

发布

2007年

中文版

GB/T 28809-2012 (等同采用的中文版本)

发布单位

国际电工委员会

当前最新

IEC 62425:2007

 

 

引用标准

EN 50124-1 EN 50125-1 EN 50125-3 EN 50155 IEC 60664 IEC 61508-1 IEC 62236 IEC 62236-4 IEC 62278 IEC 62279 IEC 62280-1 IEC 62280-2

被代替标准

IEC 9/1057/FDIS:2007

适用范围

This International Standard is applicable to safety—related electronic systems(including sub- systems and equipment)for railway signalling applications． The scope of this standard，and its relationship with other IEC standards，are shown in Figure 1． This standard is intended to apply to all safety-related railway signalling systems/sub- system/equipment．However，the hazard analysis and risk assessment processes defined in IEC 62278 and this standard are necessary for all railway signalling systems/sub— systems，equipment，in order to identify any safety requirements．If analysis reveals that no safety requirements exist(i.e.:that the situation is non-safety-related)，and provided the conclusion is not revised as a consequence of later changes，this safety standard ceases to be applicable． This standard applies to the specification,design，construction，installation，acceptance， operation，maintenance and modification/extension phases of complete signalling systems，and also to individual sub-systems and equipment within the complete system．Annex C includes procedures relating to electronic hardware components． This standard applies to generic sub-systems and equipment(both application-independent and those intended for a particular class of application)，and also to systems/sub- systems/equipment for specific applications． This standard is not applicable to existing systems/sub-systems，equipment(i．e．those which had already been accepted prior to lhe creation of this standard)．However，as far as reasonably practicable，this standard should be applied to modifications and extensions to existing systems，sub-systems and equipment． This standard is primarily applicable to systems/sub—systems，equipment which have been specifically designed and manufactured for railway signalling applications．It should also be applied．as far as reasonably practicable，to general-purpose or industrial equipment(e．g.: power supplies，modems，etc．)，which is procured for use as part of a safety—related signalling system．As a minimum，evidence shall be provided in such cases to demonstrate —either that the equipment is not relied on for safety， 一or Ihat the equipment can be relied on for those functions which relate to safety． This standard is applicable to the functional safety of railway signalling systems．It is not intended to deal with the occupational health and safety of personnel；this subject is covered by other standards．

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