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



Reference EN 62439-3:2012
Title Industrial communication networks - High availability automation networks - Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR)
Project Number 23219
Abstract/Scope IEC 62439-3:2012 specifies two redundancy protocols designed to provide seamless recovery in case of single failure of an inter-bridge link or bridge in the network, which are based on the same scheme: duplication of the LAN, resp. duplication of the transmitted information. This second edition cancels and replaces the first edition published in 2010. It constitutes a technical revision. The main changes with respect to the previous edition are: - specification of the interconnection of PRP and HSR networks; - introduction of a suffix for PRP frames; - clarification and modification of specifications to ensure interoperability; - slackening of the specifications to allow different implementations; - consideration of clock synchronization according to IEC 61588; - introduction of test modes to simplify testing and maintenance.


Current Stage code 6060
Current Stage code date 2012-09-21
Current Stage code deadline 2013-05-09
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/SC 65C
Reference Document IEC 62439-3:2012 (EQV)
ICS 25.040 - Industrial automation systems
35.040 - Character sets and information coding
Keywords Communication; Network; Automation; Redundancy protocol; Seamless ring
Note 2012-07-18 - Publication editing allocated to * To be read in conjunction with EN 62439-1:2010 * Supersedes EN 62439-3:2010
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2012-09-21 2013-05-09 export to doc file  EN  FR  DE
5099 2012-08-09 2012-09-06  
5060 2012-05-21 2012-06-11 export to doc file  EN
5020 2012-03-16 2012-05-18  
3090 2011-06-24 2011-06-30  
5060 2011-04-18 2011-05-09 export to doc file  EN
5020 2010-11-12 2011-04-15  
1090 2010-11-11 2010-11-12  

Implementation Dates

date of Ratification (DOR) (1) 2012-08-09
date of Availability (DAV) (2) 2012-09-21
date of Announcement (DOA) (3) 2012-11-09
date of Publication (DOP) (4) 2013-05-09
date of Withdrawal (DOW) (5) 2015-08-09


Supersedes EN 62439-3:2010
Superseded by  
Normative reference (6) IEEE 802.1Q:2005
IEEE 802.1D:2004
ISO/IEC 8802-3:2000
IEC 60050-191
IEC 61588
EN 62439-1
EN 62439-2
EN 62439-6
EN 62439-7

(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.