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



Reference EN 60079-27:2008
Title Explosive atmospheres - Part 27: Fieldbus intrinsically safe concept (FISCO)
Project Number 21136
Abstract/Scope This part of IEC 60079 contains the details of apparatus, systems and installation practice for use with the Fieldbus Intrinsically Safe Concept (FISCO). It is based on the concepts of Manchester encoded, bus powered systems designed in accordance with IEC 61158-2 which is the physical layer standard for Fieldbus installations. The significant change with respect to the first edition is that this standard replaces the FNICO requirements with the requirements of an 'ic' FISCO system.


Current Stage code 6060
Current Stage code date 2008-05-21
Current Stage code deadline 2009-01-01
Deadline date for vote  


Directive(s) ATEX (94/9/EC)
Order Voucher  


IEC Technical Body IEC/SC 31G
Reference Document IEC 60079-27:2008 (EQV)
ICS 29.260.20 - Electrical apparatus for explosive atmospheres
Keywords Explosive atmosphere; Fieldbus; FISCO; Intrinsically safe
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2008-05-21 2009-01-01 export to doc file  EN  FR  DE
5099 2008-04-01 2008-06-01  
5061 2008-02-27 2008-04-01  
5060 2007-11-30 2007-12-19 export to doc file  EN
3090 2007-08-10 2008-01-31  
5060 2007-07-16 2007-07-30 export to doc file  EN
5020 2007-02-09 2007-07-13  
1090 2007-02-06 2007-02-09  

Implementation Dates

date of Ratification (DOR) (1) 2008-04-01
date of Availability (DAV) (2) 2008-05-21
date of Announcement (DOA) (3) 2008-07-01
date of Publication (DOP) (4) 2009-01-01
date of Withdrawal (DOW) (5) 2011-04-01


Supersedes EN 60079-27:2006
Superseded by EN 60079-11:2012
Normative reference (6) EN 60079-0:2006
EN 60079-11:2007
EN 60079-14:2003
EN 60079-15:2005
EN 60079-25:2004
corr. April 2006
EN 61158-2:2008

(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.