EN 61666:2010/A1:2021

Industrial systems, installations and equipment and industrial products - Identification of terminals within a system

No scope available

Industrielle Systeme, Anlagen und Ausrüstungen und Industrieprodukte - Identifikation von Anschlüssen in Systemen

Systèmes industriels, installations et appareils, et produits industriels - Identification des bornes dans le cadre d'un système

Industrijski sistemi, inštalacije, oprema in industrijski izdelki - Identifikacija (označevanje) priključkov v sistemu (IEC 61666:2010/A1:2021)

General Information

• Status: Published
• Publication Date: 05-Aug-2021
• ICS: 01.080.30 - Graphical symbols for use on mechanical engineering and construction drawings, diagrams, plans, maps and in relevant technical product documentation
• Technical Committee: CLC/SR 3 - Information structures, documentation and graphical symbols
• Drafting Committee: IEC/TC 3 - IEC_TC_3
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Aug-2021
• Completion Date: 06-Aug-2021
• Ref Project: SIST EN 61666:2010/A1:2021 - Industrial systems, installations and equipment and industrial products - Identification of terminals within a system (IEC 61666:2010/A1:2021)

Relations

• Amends: EN 61666:2010 - Industrial systems, installations and equipment and industrial products - Identification of terminals within a system
• Effective Date: 03-Mar-2020

Overview

The EN 61666:2010/A1:2021 standard, developed by the European Committee for Electrotechnical Standardization (CLC), addresses the identification of terminals within industrial systems, installations, equipment, and industrial products. Aligned with the International Electrotechnical Commission's IEC 61666:2010/A1:2021, this amendment updates the original standard to improve the clarity and uniformity of terminal designation in electrical engineering contexts.

Terminals within complex industrial systems require precise and standardized identification to ensure efficient installation, maintenance, and troubleshooting. This European Standard supports engineers, designers, and manufacturers by specifying a structured method for terminal marking, facilitating consistent documentation and communication across projects and regions.

Key Topics

• Terminal Identification: EN 61666 defines a clear methodology for marking terminals within systems, distinguishing between function and product aspects.
• Reference Designation Updates: The amendment modifies terminal reference designations from single-level reference marks (e.g., -V1) to hierarchical designations (e.g., -H1), enhancing systematic representation.
• Graphical Symbols and Documentation: The standard integrates graphical symbols for terminals that are used on electrical diagrams, schematics, and related technical documentation to support visual clarity.
• Terminal Designation Sets: Various figures in the amendment exemplify design implementations that relate terminal identification to functional roles and product configurations, enabling practical application in real-world systems.
• International Consistency: EN 61666:2010/A1 follows IEC and ISO/IEC directives, ensuring worldwide compatibility and facilitating cross-border industrial cooperation.

Applications

The standard is critical for any stakeholders involved with the design, manufacturing, and maintenance of industrial electrical systems and installations:

• Electrical Engineers: Use EN 61666 to apply consistent terminal identification when designing control panels, machines, or installations.
• Manufacturers of Industrial Equipment: Adopt the standard to label terminal points accurately for clarity in production and end-user servicing.
• System Integrators and Installers: Benefit from standardized terminal markings to reduce error and improve the efficiency of installation and maintenance activities.
• Technical Documentation Specialists: Use standardized symbols and identification guidelines from EN 61666 to create clear, internationally understandable electrical schematics and manuals.
• Quality and Safety Auditors: Leverage the standard to verify the traceability and safety compliance of terminal identifications within industrial systems.

Related Standards

EN 61666:2010/A1:2021 intersects with several key standards in electrotechnical documentation and engineering practices:

• IEC 60617 – Graphical symbols for electrical diagrams, supporting symbol standardization.
• ISO/IEC 81346 – Structuring principles and reference designations for industrial systems and products.
• EN 61346 – Basic principles for structuring products and systems.
• IEC 60417 – Graphical symbols for use on equipment.
• EN 60204 – Safety of machinery – Electrical equipment of machines, which relies on clear terminal designation for safety compliance.

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Keywords: EN 61666:2010/A1:2021, terminal identification, industrial systems, electrical engineering standards, terminal marking, IEC 61666, technical documentation, electrical schematics, industrial equipment, CENELEC standardization.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2021
Industrijski sistemi, inštalacije, oprema in industrijski izdelki - Identifikacija
(označevanje) priključkov v sistemu (IEC 61666:2010/A1:2021)
Industrial systems, installations and equipment and industrial products - Identification of
terminals within a system (IEC 61666:2010/A1:2021)
Industrielle Systeme, Anlagen und Ausrüstungen und Industrieprodukte - Identifikation
von Anschlüssen in Systemen (IEC 61666:2010/A1:2021)
Systèmes industriels, installations et appareils, et produits industriels - Identification des
bornes dans le cadre d'un système (IEC 61666:2010/A1:2021)
Ta slovenski standard je istoveten z: EN 61666:2010/A1:2021
ICS:
01.080.40 Grafični simboli za uporabo v Graphical symbols for use on
risbah, diagramih, načrtih v electrical and electronics
elektrotehniki in elektroniki engineering drawings,
ter v ustrezni tehnični diagrams, charts and in
proizvodni dokumentaciji relevant technical product
documentation
29.020 Elektrotehnika na splošno Electrical engineering in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61666:2010/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2021
ICS 01.080.30
English Version
Industrial systems, installations and equipment and industrial
products - Identification of terminals within a system
(IEC 61666:2010/A1:2021)
Systèmes industriels, installations et appareils, et produits Industrielle Systeme, Anlagen und Ausrüstungen und
industriels - Identification des bornes dans le cadre d'un Industrieprodukte - Identifikation von Anschlüssen in
système Systemen
(IEC 61666:2010/A1:2021) (IEC 61666:2010/A1:2021)
This amendment A1 modifies the European Standard EN 61666:2010; it was approved by CENELEC on 2021-07-21. CENELEC members
are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the status of a
national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61666:2010/A1:2021 E

European foreword
The text of document 3/1487/FDIS, future IEC 61666/A1, prepared by IEC/TC 3 “Documentation,
graphical symbols and representations of technical information” was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 61666:2010/A1:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–04–21
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–07–21
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61666:2010/A1:2021 was approved by CENELEC as a
European Standard without any modification.

IEC 61666 ®
Edition 2.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
H ORIZONTAL PUBLICATION
P UBLICATION HORIZONTALE
AMENDMENT 1
AMENDEMENT 1
Industrial systems, installations and equipment and industrial products –

Identification of terminals within a system

Systèmes industriels, installations et appareils, et produits industriels –

Identification des bornes dans le cadre d’un système

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 01.080.30 ISBN 978-2-8322-9884-8

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