International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference prEN 50126-4
Title Railway applications - The Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 4: Functional Safety - Electrical/Electronic/Programmable electronic systems
Project Number 21754
Enquiry stage


Current Stage code 4098
Current Stage code date 2014-03-17
Current Stage code deadline  
Deadline date for vote  


Directive(s) RAIL (2008/57/EC)
Mandate(s) M/334; M/483
Order Voucher  


IEC Technical Body  
Reference Document  
Keywords Railway; Reliability; Availability; Maintainability; RAMS
Note 2014-03 TC Decision: WI to be stopped as draft for vote cannot be delivered on time in the frame of the 3-year timeframe * 2012-06-29 - Enquiry editing allocated to * D144/C085: Second extension of the target date for vote approved to read 2014-03-05 with transfer in the new audit system
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
4098 2014-03-17    
4060 2013-04-03 2013-04-24 export to doc file  EN
4020 2012-10-26 2013-03-29 export to doc file  EN  FR
3099 2012-06-29    
2020 2010-12-03 2011-06-30  
1099 2008-04-01 2008-10-01  
1000 2007-12-05 2008-04-01  

Implementation Dates

date of Ratification (DOR) (1)  
date of Availability (DAV) (2)  
date of Announcement (DOA) (3) -
date of Publication (DOP) (4) -
date of Withdrawal (DOW) (5) -


Supersedes EN 50129:2003
Superseded by  
Normative reference (6)  

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.