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



Reference EN 62439-3:2010
Title Industrial communication networks - High availability automation networks - Part 3: Parallel Redundancy Protocol (PRP) and High availability Seamless Redundancy (HSR)
Project Number 22118
Abstract/Scope IEC 62439-3:2010(E) is applicable to high-availability automation networks based on the ISO/IEC 8802-3 (IEEE 802.3) (Ethernet) technology. It specifies two redundancy protocols based on the duplication of the LAN, respectively duplication of the transmitted information, designed to provide seamless recovery in case of single failure of an inter-switch link or switch in the network. It cancels and replaces IEC 62439 published in 2008 and constitutes a technical revision. It includes the following significant technical changes with respect to IEC 62439 (2008): -adding a calculation method for RSTP (rapid spanning tree protocol, IEEE 802.1Q), - adding two new redundancy protocols: HSR (High-availability Seamless Redundancy) and DRP (Distributed Redundancy Protocol), - moving former Clauses 1 to 4 (introduction, definitions, general aspects) and the Annexes (taxonomy, availability calculation) to IEC 62439-1, which serves now as a base for the other documents, - moving Clause 5 (MRP) to IEC 62439-2 with minor editorial changes, -


Current Stage code 6060
Current Stage code date 2010-03-19
Current Stage code deadline 2010-12-01
Deadline date for vote  


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IEC Technical Body IEC/SC 65C
Reference Document IEC 62439-3:2010 (EQV)
ICS 25.040 - Industrial automation systems
35.040 - Character sets and information coding
Keywords Communication; Network; Automation; Redundancy protocol; Seamless ring
Note Partially supersedes EN 62439:2008 * Superseded by EN 62439-3:2012
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2010-03-19 2010-12-01 export to doc file  EN  DE
5099 2010-03-01 2010-05-01  
5060 2010-02-04 2010-02-18 export to doc file  EN
5020 2009-11-27 2010-01-29  
3090 2009-05-29 2009-09-30  
5060 2009-04-27 2009-05-11 export to doc file  EN
5020 2008-11-21 2009-04-24  
1090 2008-11-18 2008-11-21  

Implementation Dates

date of Ratification (DOR) (1) 2010-03-01
date of Availability (DAV) (2) 2010-03-19
date of Announcement (DOA) (3) 2010-06-01
date of Publication (DOP) (4) 2010-12-01
date of Withdrawal (DOW) (5) 2013-03-01


Supersedes EN 62439:2008
Superseded by EN 62439-3:2012
Normative reference (6) IEEE 802.1Q:2005
IEEE 802.1D
ISO/IEC 8802-3
IEC 60050-191
EN 62439-1

(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.