SIST EN 61076-2-104:2014

Connectors for electronic equipment - Product requirements -- Part 2-104: Circular connectors - Detail specification for circular connectors with M8 screw-locking or snap-locking

IEC 61076-2-104:2014 describes circular connectors M8 screw-locking or with nominal diameter 8 mm snap-locking, typically used for industrial process measurement and control. These connectors consist of fixed and free connectors either rewireable or non-rewireable. Male connectors have round contacts of diameter 0,6 mm, diameter 0,7 mm and diameter 1,0 mm. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. The main technical changes with regard to the previous edition are as follows:
- three new type ways have been added to the A-coding, including new gauges and contact diameters and
- the type designation has been removed.
Key words: Connectors, Circular Connectors, Data transmission

Steckverbinder für elektronische Einrichtungen - Produktanforderungen -- Teil 2-104: Rundsteckverbinder - Bauartspezifikation für Rundsteckverbinder M8 mit Schraub- oder Rastverriegelung

Connecteurs pour équipements électroniques - Exigences de produit -- Partie 2-104: Connecteurs circulaires - Spécification particulière pour les connecteurs circulaires M8 à vis ou à encliquetage

L'IEC 61076-2-104:2014 décrit les connecteurs circulaires M8 à vis ou à encliquetage de 8 mm de diamètre nominal, généralement utilisés pour les mesures et les commandes dans les processus industriels. Ces connecteurs se composent d'embases et de fiches, démontables ou non. Les connecteurs mâles possèdent des contacts arrondis, de diamètre de 0,6 mm, de diamètre de 0,7 mm et de diamètre de 1,0 mm.
Cette deuxième édition annule et remplace la première édition parue en 2008. Cette édition constitue une révision technique. Les principales modifications techniques par rapport à l'édition précédente sont:
- trois nouveaux types de voies ont été ajoutés au codage-A, y compris de nouveaux calibres et diamètres de contact et
- la désignation de type a été supprimée.
Mots-clés: connecteurs, connecteurs circulaires, transmission de données

Konektorji za elektronsko opremo - Zahteve za izdelek - 2-104. del: Okrogli konektorji - Podrobna specifikacija za okrogle konektorje z vijačnim M8 ali zaskočnim zaklepanjem (IEC 61076-2-104:2014)

Ta del standarda IEC 61076 opisuje okrogle konektorje z vijačnim M8 zaklepanjem ali zaskočnim zaklepanjem z nominalnim premerom 8 mm, ki se običajno uporabljajo za merjenje in krmiljenje v industrijskih procesih. Ti konektorji so sestavljeni iz pritrjenih in prostih konektorjev z možnostjo ponovnega ožičenja ali brez. Moški konektorji imajo okrogle kontakte s premerom 0,6 mm, 0,7 mm in 1,0 mm.
V tej podrobni specifikaciji so mere navedene v milimetrih.
OPOMBA M8 je mera navoja mehanizma z vijačnim zaklepanjem teh okroglih konektorjev.

General Information

• Status: Published
• Publication Date: 13-Nov-2014
• ICS: 31.220.10 - Plug-and-socket devices. Connectors
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Nov-2014
• Due Date: 09-Jan-2015
• Completion Date: 14-Nov-2014
• Ref Project: EN 61076-2-104:2014 - Connectors for electronic equipment - Product requirements - Part 2-104: Circular connectors - Detail specification for circular connectors with M8 screw-locking or snap-locking

Relations

• Replaces: SIST EN 61076-2-104:2008 - Connectors for electronic equipment - Product requirements -- Part 2-104: Circular connectors - Detail specification for circular connectors with M8 screw-locking or snap-locking
• Effective Date: 28-Jan-2023
• Revised: kSIST FprEN IEC 61076-2-104:2025 - Connectors for electronic equipment - Product requirements - Part 2-104: Circular connectors - Detail specification for circular connectors with m8 screw-locking or snap-locking
• Effective Date: 24-Oct-2023
• Revised: SIST EN 61076-2-104:2008 - Connectors for electronic equipment - Product requirements -- Part 2-104: Circular connectors - Detail specification for circular connectors with M8 screw-locking or snap-locking
• Effective Date: 06-May-2014

Overview

EN 61076-2-104:2014 (CLC / IEC 61076-2-104:2014) is the detail specification for circular M8 connectors with screw‑locking or snap‑locking, typically used in industrial process measurement and control and data transmission. It defines product requirements for fixed and free connectors, both rewireable and non‑rewireable, and includes mechanical, electrical and environmental requirements. Male contacts are specified with round contact diameters of 0.6 mm, 0.7 mm and 1.0 mm. This second edition (2014) is a technical revision of the 2008 edition with additions to A‑coding and removal of the type designation.

Key topics and technical requirements

• Connector types and styles: Fixed (panel) and free (cable) connectors; rewireable and non‑rewireable versions; straight and right‑angled variants; screw‑lock and snap‑lock forms.
• Contact geometry: Male contact diameters (0.6, 0.7, 1.0 mm) and A/B coding arrangements for pin positions.
• Dimensional & interface data: Detailed mating dimensions, interface drawings, and gauges for sizing and retention force.
• Electrical characteristics: Rated voltage, impulse voltage considerations, insulation resistance, contact resistance and voltage proof tests.
• Mechanical characteristics: Insertion/withdrawal forces, contact retention, mechanical endurance (number of mating cycles), vibration and dynamic stress tests.
• Environmental requirements & tests: Climatic category, IP degree of protection (enclosure protection), corrosion and chemical resistivity tests, and climatic sequence testing per referenced IEC test methods.
• Marking & safety: Requirements for marking, polarization methods and safety aspects relevant to low‑voltage connector use.
• Test schedules & methods: Test groups covering preliminary, mechanical, electrical, climatic, chemical and connection‑method tests with specified arrangements and pass/fail criteria.

Applications and who uses this standard

• Automation and process control: Sensor/actuator cabling, fieldbus and I/O connections in factories and process plants.
• Connector and cable manufacturers: Design, production and quality control of M8 circular connectors and accessories.
• Product designers and system integrators: Ensuring component compatibility, interchangeability and system reliability.
• Test laboratories and certifiers: Performing conformity, electrical, mechanical and environmental testing.
• Procurement and maintenance teams: Specifying components that meet industrial IP, endurance and safety requirements.

Related standards

• IEC 61076‑1 (generic connector specifications)
• IEC 60512 (connectors - tests and measurements)
• IEC 60529 (IP code - degrees of protection)
• IEC 60068 series (environmental testing)

EN 61076-2-104:2014 provides the definitive technical baseline for M8 circular connectors used in industrial data transmission and measurement/control systems, supporting interoperable, robust connector design and testing.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steckverbinder für elektronische Einrichtungen - Produktanforderungen -- Teil 2-104: Rundsteckverbinder - Bauartspezifikation für Rundsteckverbinder M8 mit Schraub- oder RastverriegelungConnecteurs pour équipements électroniques - Exigences de produit -- Partie 2-104: Connecteurs circulaires - Spécification particulière pour les connecteurs circulaires M8 à vis ou à encliquetageConnectors for electronic equipment - Product requirements -- Part 2-104: Circular connectors - Detail specification for circular connectors with M8 screw-locking or snap-locking31.220.10Plug-and-socket devices. ConnectorsICS:Ta slovenski standard je istoveten z:EN 61076-2-104:2014SIST EN 61076-2-104:2014en01-december-2014SIST EN 61076-2-104:2014SLOVENSKI
STANDARDSIST EN 61076-2-104:20081DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 61076-2-104
October 2014 ICS 31.220.10
Supersedes EN 61076-2-104:2008
English Version
Connectors for electronic equipment - Product requirements - Part 2-104: Circular connectors - Detail specification for circular connectors with M8 screw-locking or snap-locking (IEC 61076-2-104:2014)
Connecteurs pour équipements électroniques - Exigences de produit - Partie 2-104: Connecteurs circulaires - Spécification particulière pour les connecteurs circulaires M8 à vis ou à encliquetage (CEI 61076-2-104:2014)
Steckverbinder für elektronische Einrichtungen - Produktanforderungen - Teil 2-104: Rundsteckverbinder - Bauartspezifikation für Rundsteckverbinder M8 mit Schraub- oder Rastverriegelung (IEC 61076-2-104:2014) This European Standard was approved by CENELEC on 2014-10-14. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17,
B-1000 Brussels © 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61076-2-104:2014 E SIST EN 61076-2-104:2014

The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-07-14 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-10-14
This document supersedes EN 61076-2-104:2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.
Endorsement notice The text of the International Standard IEC 61076-2-104:2014 was approved by CENELEC as a European Standard without any modification. SIST EN 61076-2-104:2014

- 3 - EN 61076-2-104:2014 Annex ZA (normative)
Normative references to international publications with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu
Publication Year Title EN/HD Year
IEC 60050 Series
International Electrotechnical Vocabulary - -
IEC 60068-1 2013
Environmental testing -
Part 1: General and guidance EN 60068-1 2014
IEC 60068-2-60 -
Environmental testing -
Part 2: Tests - Test Ke: Flowing mixed
gas corrosion test EN 60068-2-60 -
IEC 60352 Series
Solderless connections EN 60352 Series
IEC 60512 Series
Connectors for electronic equipment - Tests and measurements EN 60512 Series
IEC 60529
+ A1 + A2
1999 2013 Degrees of protection provided by enclosures (IP Code) EN 60529 corr. May + A1 + A2 1991
1993 2000 2013 IEC 60664-1 2007
Insulation coordination for equipment within low-voltage systems -
Part 1: Principles, requirements and tests EN 60664-1 2007
IEC 60998-2-1 -
Connecting devices for low-voltage
circuits for household
and similar purposes -
Part 2-1: Particular requirements for connecting devices as separate entities with screw-type clamping units EN 60998-2-1 -
IEC 60999 Series
Connecting devices - Electrical copper conductors - Safety requirements for screw-type and screwless-type clamping units EN 60999 Series
IEC 61076-1 2006
Connectors for electronic equipment - Product requirements -
Part 1: Generic specification EN 61076-1 2006
IEC 61984 -
Connectors - Safety requirements and tests EN 61984 -
ISO 1302 -
Geometrical Product Specifications (GPS) - Indication of surface texture in technical product documentation EN ISO 1302 -
IEC 61076-2-104 Edition 2.0 2014-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Connectors for electronic equipment – Product requirements –
Part 2-104: Circular connectors – Detail specification for circular connectors
with M8 screw-locking or snap-locking
Connecteurs pour équipements électroniques – Exigences de produit –
Partie 2-104: Connecteurs circulaires – Spécification particulière pour les connecteurs circulaires M8 à vis ou à encliquetage INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE W ICS 31.220.10 PRICE CODE CODE PRIX ISBN 978-2-8322-9670-3
– 2 – IEC 61076-2-104:2014 © IEC 2014 CONTENTS FOREWORD . 5 1 Scope . 8 2 Normative references . 8 3 Technical information . 9 3.1 Terms and definitions . 9 3.2 Recommended method of termination . 9 3.3 Number of contacts, ratings and characteristics . 9 3.4 Creepage and clearance distances . 9 3.5 Marking . 10 3.6 Safety aspects . 10 4 Dimensional information . 10 4.1 General . 10 4.2 Survey of styles and variants . 10
General . 10 4.2.1 Fixed connectors . 10 4.2.2 Free connectors . 12 4.2.34.3 Interface dimensions . 17
Pin front and side view A-coding . 17 4.3.1 Pin front view B-coding . 19 4.3.24.4 Engagement (mating) information . 20 4.5 Gauges . 21
Sizing gauges and retention force gauges . 21 4.5.15 Characteristics . 22 5.1 Climatic category . 22 5.2 Electrical characteristics . 22
Rated voltage – Rated impulse voltage – Pollution degree . 22 5.2.1 Voltage proof . 23 5.2.2 Current-carrying capacity . 23 5.2.3 Contact resistance . 23 5.2.4 Insulation resistance . 23 5.2.55.3 Mechanical characteristics . 24
Mechanical operation . 24 5.3.1 Insertion and withdrawal forces . 24 5.3.2 Contact retention in insert . 24 5.3.3 Polarizing method . 24 5.3.4 Vibration (sinusoidal) . 24 5.3.55.4 Other characteristics . 25
IP degree of protection . 25 5.4.16 Test schedule . 25 6.1 General . 25
Introductury remarks . 25 6.1.1 Arrangement for contact resistance measurements . 25 6.1.2 Arrangement for dynamic stress tests (vibration) . 26 6.1.36.2 Test schedule . 28
Test group P – Preliminary . 28 6.2.1 Test group AP – Dynamic/ Climatic . 29 6.2.2SIST EN 61076-2-104:2014

IEC 61076-2-104:2014 © IEC 2014 – 3 –
Test group BP – Mechanical endurance . 31 6.2.3 Test group CP – Electrical load . 33 6.2.4 Test group DP – Chemical resistivity . 34 6.2.5 Test group EP – Connection method tests . 34 6.2.6 (informative)
Diameter of the female connector body . 35 Annex A Figure 1 – Tube insert, male contacts dip solder mounting, long version . 11 Figure 2 – Tube insert, male contacts dip solder mounting, short version . 11 Figure 3 – Fixed connector with wire ends,
male contacts, single hole mounting . 11 Figure 4 – Fixed connector with wire ends,
female contacts, single hole mounting . 12 Figure 5 – Rewireable connector, male contacts,
straight version, with locking nut . 13 Figure 6 – Rewireable connector, male contacts,
right angled version, with locking nut . 13 Figure 7 – Non-rewireable connector, male contacts,
straight version, snap-locking . 14 Figure 8 – Non-rewireable connector, male contacts,
straight version, with locking nut . 14 Figure 9 – Non-rewireable connector, male contacts, right angled version, with locking nut . 14 Figure 10 – Rewireable connector, female contacts,
straight version, with locking nut . 15 Figure 11 – Rewireable connector, female contacts,
right angled version, with locking nut . 15 Figure 12 – Non-rewireable connector, female contacts,
straight version, snap-locking . 15 Figure 13 – Non-rewireable connector, female contacts, right angled version, snap-locking . 16 Figure 14 – Non-rewireable connector, female contacts, straight version, with locking nut . 16 Figure 15 – Non-rewireable connector, female contacts,
right angled version, with locking nut . 16 Figure 16 – Pin front view A-coding . 17 Figure 17 – Pin side view A-coding . 18 Figure 18 – Contact position A-coding – Front view . 19 Figure 19 – Pin front view B-coding . 19 Figure 20 – Contact position – B-coding – Front view. 20 Figure 21 – Engagement (mating) information . 20 Figure 22 – Gauge dimensions . 22 Figure 23 – Contact resistance arrangement . 26 Figure 24 – Dynamic stress test arrangement . 27 Figure A.1 – Diameter of the female connector body, coding variant A . 35 Figure A.2 – Shape of the female connector body, coding variant B . 35
Table 1 – Connector ratings related to coding and number of contacts . 9 Table 2 – Creepage and clearance distances . 9 Table 3 – Styles of fixed connectors . 10 Table 4 – Styles of free connectors . 12 Table 5 – Connector dimensions in mated and locked position . 21 Table 6 – Gauges . 22 Table 7 – Climatic category. 22 Table 8 – Rated voltage – Rated impulse voltage – Voltage proof . 23 Table 9 – Voltage proof . 23 SIST EN 61076-2-104:2014

– 4 – IEC 61076-2-104:2014 © IEC 2014 Table 10 – Number of mechanical operations . 24 Table 11 – Insertion and withdrawal forces . 24 Table 12 – Number of test specimens . 25 Table 13 – Test group P . 28 Table 14 – Test group AP . 29 Table 15 – Test group BP . 31 Table 16 – Test group CP . 33 Table 17 – Test group DP . 34 Table 18 – Test group EP . 34
IEC 61076-2-104:2014 © IEC 2014 – 5 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
CONNECTORS FOR ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 2-104: Circular connectors –
Detail specification for circular connectors
with M8 screw-locking or snap-locking
FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61076-2-104 has been prepared by subcommittee 48B: Connectors, of IEC technical committee 48: Electromechanical components and mechanical structures for electronic equipment. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. The main technical changes with regard to the previous edition are as follows: • three new type ways have been added to the A-coding, including new gauges and contact diameters; • the type designation has been removed. SIST EN 61076-2-104:2014

– 6 – IEC 61076-2-104:2014 © IEC 2014 A list of all parts of the IEC 61076 series, under the general title Connectors for electronic equipment – Product requirements, can be found on the IEC website. The text of this standard is based on the following documents: FDIS Report on voting 48B/2384/FDIS 48B/2399/RVD
Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be
• reconfirmed, • withdrawn, • replaced by a revised edition, or • amended.
IEC 61076-2-104:2014 © IEC 2014 – 7 – International Electrotechnical Commission IEC SC 48B – Connectors Specification available from: IEC General secretariat or from the addresses shown on the inside cover. IEC 61076-2-104 ELECTRONIC COMPONENTS detail specification in accordance with IEC 61076-1
Circular connectors M8/ diameter 8 mm
3 to 8 way Male and female contacts Male and female connectors Rewireable – Non-rewireable Free cable connectors Straight and right angle connectors Fixed connectors Flange mounting Single hole mounting
– 8 – IEC 61076-2-104:2014 © IEC 2014 CONNECTORS FOR ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 2-104: Circular connectors –
Detail specification for circular connectors
with M8 screw-locking or snap-locking
1 Scope This part of IEC 61076 describes circular connectors M8 screw-locking or with nominal diameter 8 mm snap-locking, typically used for industrial process measurement and control. These connectors consist of fixed and free connectors either rewireable or non-rewireable. Male connectors have round contacts of diameter 0,6 mm, diameter 0,7 mm and diameter 1,0 mm. Throughout this detail specification, dimensions are in mm. NOTE M8 is the dimension of the thread of the screw-locking mechanism of these circular connectors. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050 (all parts): International Electrotechnical Vocabulary (available at http://www.electropedia.org)
IEC 60068-1:2013, Environmental testing - Part 1: General and guidance IEC 60068-2-60, Environmental testing – Part 2: Tests – Test Ke: Flowing mixed gas corrosion test IEC 60352 (all parts), Solderless connections IEC 60512 (all parts), Connectors for electronic equipment – Tests and measurements IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
Amendment 2:2013
Amendment 1:1999
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1: Principles, requirements and tests IEC 60998-2-1, Connecting devices for low-voltage circuits for household and similar purposes – Part 2-1: Particular requirements for connecting devices as separate entities with screw-type clamping units IEC 60999 (all parts), Connecting devices – Electrical copper conductors – Safety requirements for screw-type and screwless-type clamping units SIST EN 61076-2-104:2014

IEC 61076-2-104:2014 © IE
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