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



Reference EN 60079-11:2012
Title Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
Project Number 22690
Abstract/Scope NEW! IEC 60079-11:2011 is now available as IEC Standards+ 60079-11:2011 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60079-11:2011 specifies the construction and testing of intrinsically safe apparatus intended for use in an explosive atmosphere and for associated apparatus, which is intended for connection to intrinsically safe circuits which enter such atmospheres. This type of protection is applicable to electrical equipment in which the electrical circuits themselves are incapable of causing an explosion in the surrounding explosive atmospheres. This standard is also applicable to electrical equipment or parts of electrical equipment located outside the explosive atmosphere or protected by another Type of Protection listed in IEC 60079-0, where the intrinsic safety of the electrical circuits in the explosive atmosphere may depend upon the design and construction of such electrical equipment or parts of such electrical equipment. The electrical circuits exposed to the explosive atmosphere are evaluated for use in such an atmosphere by applying this standard. The requirements for intrinsically safe systems are provided in IEC 60079-25. This standard supplements and modifies the general requirements of IEC 60079-0, except as indicated in Table 1. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirements of this standard shall take precedence. This sixth edition cancels and replaces the fifth edition of IEC 60079-11 published in 2006, the first edition of IEC 61241-11 published in 2005, and partially replaces the second edition of IEC 60079-27 published in 2008 and constitutes a full technical revision. The significant changes with respect to the previous edition are listed below: - Inclusion of non-edition specific references to IEC 60079-0. - The merging of the apparatus requirements for FISCO from IEC 60079-27. - The merging of the requirements for combustible dust atmospheres from IEC 61241-11. - Clarification of the requirements for accessories connected to intrinsically safe apparatus; such as chargers and data loggers. - Addition of new test requirements for opto-isolators. - Introduction of Annex H about ignition testing of semiconductor limiting power supply circuits. The contents of the corrigendum of January 2012 have been included in this copy.


Current Stage code 6060
Current Stage code date 2012-01-06
Current Stage code deadline 2012-05-04
Deadline date for vote  


Directive(s) ATEX (94/9/EC), TDG (2008/68/EC)
Order Voucher  


IEC Technical Body IEC/SC 31G
Reference Document IEC 60079-11:2011 (EQV) + corrigendum Jan. 2012 (EQV)
ICS 29.260.20 - Electrical apparatus for explosive atmospheres
Keywords Explosive; Atmosphere; Protection; Intrinsic; Safety "i"
Note Publication editing allocated to * Supersedes EN 60079-11:2007 + EN 61241-11:2006 + EN 60079-27:2008
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2012-01-06 2012-05-04 export to doc file  EN  FR  DE
5099 2011-08-04 2011-09-01  
5060 2011-05-16 2011-06-06 export to doc file  EN
5020 2011-03-11 2011-05-13  
3090 2010-05-28 2011-01-31  
5060 2010-03-29 2010-04-12 export to doc file  EN
5020 2009-10-23 2010-03-26  
1090 2009-10-20 2009-10-23  

Implementation Dates

date of Ratification (DOR) (1) 2011-08-04
date of Availability (DAV) (2) 2012-01-06
date of Announcement (DOA) (3) 2011-11-04
date of Publication (DOP) (4) 2012-07-06
date of Withdrawal (DOW) (5) 2014-08-04


(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.