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Reference EN 61511-1:2004
Title Functional safety - Safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hardware and software requirements
Project Number 16106
Abstract/Scope Gives requirements for the specification, design, installation, operation and maintenance of a safety instrumented system, so that it can be confidently entrusted to place and/or maintain the process in a safe state. This standard has been developed as a process sector implementation of EN 61508.


Current Stage code 6060
Current Stage code date 2004-12-23
Current Stage code deadline 2005-10-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/SC 65A
Reference Document IEC 61511-1:2003 (EQV) + corrigendum Nov. 2004 (EQV)
ICS 13.110 - Safety of machinery
25.040.01 - Industrial automation systems in general
Keywords Safety; Process industry; Functional safety; Framework; Hardware/software
Special National Condition(s)  


Categories - Aspects
Product Life Cycle
All Others Manufacturing, Use, Recovery, Disposal B2B, B2C


Deadline Date
6060 2004-12-23 2005-10-01 export to doc file  EN
5099 2004-10-01 2005-02-01  
5020 2004-02-20 2004-08-27  
1090 2003-12-02 2004-06-02  

Implementation Dates

date of Ratification (DOR) (1) 2004-10-01
date of Availability (DAV) (2) 2004-12-23
date of Announcement (DOA) (3) 2005-04-01
date of Publication (DOP) (4) 2005-10-01
date of Withdrawal (DOW) (5) 2007-10-01


Superseded by prEN 61511-1
Normative reference (6) EN 60654-1:1993
EN 60654-3:1997
EN 61326:1997
corr. January 1998
corr. September 1998
EN 61508-2:2001
EN 61508-3:2001
EN 61511-2:2004

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of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn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