EN 4531-001:2017

Aerospace series - Connectors, optical, circular, single and multipin, coupled by triple start threaded ring - Flush contacts - Part 001: Technical specification

This European Standard specifies the general characteristics, the conditions for qualification, acceptance and quality assurance, as well as the test programs and groups for threaded ring coupling circular fibre optic self-locking connectors, fire-resistant or non fire-resistant, intended for use in a temperature range from −65 °C to 150 °C (cable dependent) continuous.

Luft- und Raumfahrt - Optische Rundsteckverbinder mit dreigängiger Schraubkupplung - Bündige Kontakte - Teil 001: Technische Lieferbedingungen

Diese Europäische Norm legt die allgemeinen Eigenschaften, die Bedingungen für die Qualifikation, Abnahme und Quali¬tätssicherung sowie Prüfprogramme und  gruppen für optische Rundsteckverbinder mit Schraubkupplung, selbstsichernd, feuerbeständig oder nicht feuerbeständig, bestimmt für die Anwendung in einem konstanten Temperaturbereich von −65 °C bis 150 °C (leitungsabhängig) fest.

Série aérospatiale - Connecteurs optiques circulaires, mono et multibroches, à accouplement par bague filetée à trois filets - Contacts affleurants - Partie 001: Spécification technique

La présente Norme européenne spécifie les caractéristiques générales, les conditions de qualification, d'acceptation et d'assurance qualité ainsi que les programmes et les groupes d'essais pour les connecteurs optiques circulaires à accouplement par bague filetée, à freinage interne, résistant au feu ou non, prévus pour être utilisés dans une plage de températures de  65 °C à 150 °C (en fonction du câble) continu.

Aeronavtika - Konektorji, optični, okrogli, z enim ali več zatiči, priključeni s tristopenjskim navojnim obročkom - Izravnani kontakti - 001. del: Tehnična specifikacija

Ta evropski standard določa splošne značilnosti, pogoje kvalifikacije, sprejemljivosti in zagotavljanja kakovosti ter preskusne programe in skupine za okrogle samozaporne konektorje iz optičnih vlaken, priključene z navojnim obročkom, ognjevzdržne ali ne, za uporabo pri stalnih temperaturah med –65 °C in 150 °C (odvisno od kabla).

General Information

• Status: Published
• Publication Date: 10-Jan-2017
• Withdrawal Date: 30-Jul-2017
• ICS: 49.060 - Aerospace electric equipment and systems
• ICS: 49.090 - On-board equipment and instruments
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2 - Electrical
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 11-Jan-2017
• Completion Date: 11-Jan-2017
• Ref Project: SIST EN 4531-001:2017 - Aerospace series - Connectors, optical, circular, single and multipin, coupled by triple start threaded ring - Flush contacts - Part 001: Technical specification

Relations

• Replaces: EN 4531-001:2012 - Aerospace series - Connectors, optical, circular, single and multipin, coupled by triple start threaded ring - Flush contacts - Part 001: Technical specification
• Effective Date: 12-Mar-2014

Overview

EN 4531-001:2017 is a CEN aerospace standard that defines the technical specification for circular fibre‑optic connectors coupled by a triple‑start threaded ring with flush contacts. It covers general characteristics, materials, mechanical design, environmental limits, and the conditions for qualification, acceptance and quality assurance, including required test programs and groups. These connectors are intended for aerospace on‑board use and continuous operation in a temperature range of −65 °C to 150 °C (cable dependent) and can be fire‑resistant or non fire‑resistant.

Key topics and technical requirements

• Connector family and derivation: Derived from MIL‑DTL‑38999L (series III) and EN 3645‑001; uses rear‑removable optical contacts with a 2.5 mm ferrule.
• Mechanical coupling: Triple‑start threaded coupling ring, self‑locking; designed to achieve full locking at approximately 360°; visual mating confirmation via masking of a red band.
• Polarization and scoop‑proofing: Polarization by key/keyway arrangement; shell sizes 9, 11 and 13 are 100% scoop proof.
• Female insert variants:
  • A‑Type (flush) - intended for multimode contacts.
  • B‑Type (recessed) - required for single‑mode contacts.
  • Zirconia (ZrO2) alignment sleeves specified; sleeve withdrawal force per EN 61300‑3‑33 is ≈ 1.9 N to 3.5 N (product‑standard dependent).
• Materials & sealing: Shells and fittings require corrosion‑resistant finishes; insert materials and seals specified for mechanical strength and environmental protection; O‑ring panel seals on jam‑nut receptacles.
• Installation & contact handling: Contacts are inserted/removed from the rear; tools per MIL‑I‑81969 may be used for ease of operation.
• Qualification, tests & QA: Normative references define test methods (EN 2591 family, EN 3197, EN 3909, EN 61300 series); EN 4531‑001 specifies test programs, acceptance criteria and quality assurance processes.

Applications and users

• Who uses it: Aerospace OEMs, harness designers, avionics engineers, component manufacturers, and qualification/test laboratories working on aircraft fibre‑optic interconnects.
• Practical uses: On‑board aircraft fibre‑optic connections where rugged, sealed, polarized and high‑reliability optical coupling is required - e.g., flight control data buses, sensors, avionics subsystems, and repair/maintenance of aerospace harnesses.

Related standards

• EN 3645 (family) - mechanical shell/mating interfaces
• EN 4531‑002 / EN 4531‑101 - product and contact specifications
• EN 2591 (test methods), EN 3197 (design/installation rules)
• EN 61300‑3‑33 (alignment sleeve withdrawal test)
• MIL‑DTL‑38999L, MIL‑STD‑1373 (thread and coupling references)

Keywords: EN 4531‑001:2017, aerospace connectors, fibre optic connectors, triple‑start threaded ring, flush contacts, zirconia alignment sleeve, connector qualification, aerospace interconnect standards.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VSHFLILNDFLMDLuft- und Raumfahrt - Optische Rundsteckverbinder mit dreigängiger Schraubkupplung - Bündige Kontakte - Teil 001: Technische LieferbedingungenSérie aérospatiale - Connecteurs optiques circulaires, mono et multibroche, à accouplement par bague filetée à trois filets - Contacts affleurants - Partie 001: Spécification techniqueAerospace series - Connectors, optical, circular, single and multipin, coupled by triple start threaded ring - Flush contacts - Part 001: Technical specification49.060Aerospace electric equipment and systems31.220.10Plug-and-socket devices. ConnectorsICS:Ta slovenski standard je istoveten z:EN 4531-001:2017SIST EN 4531-001:2017en,fr,de01-marec-2017SIST EN 4531-001:2017SLOVENSKI
STANDARDSIST EN 4531-001:20121DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4531-001
January
t r s y ICS
v {ä r { r Supersedes EN
v w u sæ r r sã t r s tEnglish Version
Aerospace series æ Connectorsá opticalá circulará single and multipiná coupled by triple start threaded ring æ Flush contacts æ Part
r r sã Technical specification Série aérospatiale æ Connecteurs optiques circulairesá mono et multibrochesá à accouplement par bague filetée à trois filets æ Contacts affleurants æ Partie
r r sã Spécification technique
Luftæ und Raumfahrt æ Optische Rundsteckverbinder mit dreigängiger Schraubkupplung æ Bündige Kontakte æ Teil
r r sã Technische Lieferbedingungen This European Standard was approved by CEN on
t { July
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
v w u sæ r r sã t r s y ESIST EN 4531-001:2017

Page European foreword . 3 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 6 4 Description . 6 5 Design . 7 6 Definition drawings and masses . 8 7 Tests . 26 8 Quality assurance . 31 9 Designation and marking . 37 10 Packaging . 37 11 Storage . 37
« x w °C to 150 °C (cable dependent) continuous. 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. EN 2591 (all parts), Aerospace series — Elements of electrical and optical connection — Test methods EN 3197, Aerospace series — Design and installation of aircraft electrical and optical interconnection systems EN 3645 (all parts), Aerospace series — Connectors, electrical, circular, scoop proof, triple start threaded coupling, operating temperature 175 °C or 200 °C continuous EN 3909, Aerospace series - Test fluids and test methods for electrical and optical components and sub-assemblies EN 4531-002, Aerospace series — Connectors, optical, circular, single and multipin, coupled by triple start threaded ring — Flush contacts — Part 002: Specification of performance and contact arrangements EN 4531-101, Aerospace series - Connectors, optical, circular, single and multipin, coupled by triple start threaded ring - Flush contacts - Part 101: Optical contact for EN 4641 multimode cable -55 °C to 125 °C - Product standard EN 4533-004, Aerospace series — Fibre optic systems — Handbook — Part 004: Repair, maintenance and inspection EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace standard parts ISO 263, ISO inch screw threads — General plan and selection for screws, bolts and nuts — Diameter range 0,06 to 6 in1) EN 61300-3-33, Fibre optic interconnecting devices and passive components — Basic test and measurement procedures — Part 3-33: Examinations and measurements — Withdrawal force from a resilient alignment sleeve using gauge pins (IEC 61300-3-33:2012) MIL-STD-1373, Screw thread, modified, 60° stub, double2) MIL-DTL-38999L, Connectors, Electrical, Circular, Miniature, High Density, Quick Disconnect (Bayonet, Threaded, or Breech Coupling), Environment Resistant with Crimp Removable Contacts or Hermetically Sealed with fixed, Solderable Contacts General Specification for2)
1) Published as ISO International Standardisation Organisation http://www.iso.ch/. 2) Published as DoD National (US) Mil. Department of Defense http://www.defenselink.mil/. SIST EN 4531-001:2017

A (without ferrule) B
Key 1 Thread 2 When sleeve is in rear position Figure 1 — Drawing for shell sizes 11, 13, 15, 19, 21 and 25 SIST EN 4531-001:2017

A (without ferrule)
Key 1 Thread 2 When sleeve is in rear position Figure 2 — Drawing for shell size 9 Table 1
Shell size A Ø F Ø G Ø H Ø J Ø R gask loc
+0,13 F0,25
max. 9 14,73 14,50 14,42 14,14 7,24 11,36 11,20 12,63 12,34 15,88 11 17,60 17,32 10,49 14,61 14,45 15,88 15,60 19,05 13 20,77 20,49 13,39 17,45 17,30 19,66 19,38 22,23 15 23,95 23,67 16,56 20,63 20,44 22,84 22,56 25,40 19 29,89 29,56 22,00 26,47 26,31 28,63 28,40 31,75 21 33,07 32,74 25,17 29,64 29,49 31,85 31,57 34,73 25 39,42 39,09 31,52 35,99 35,84 38,20 37,92 41,28 6.2.2 Receptacle with male insert The mating dimensions of receptacles with male insert are shown in Figure 3 for shell sizes 11, 13, 15, 19, 21, and 25, Figure 4 for shell size 9 and Table 1. Same dimensions as EN 3645 connectors. SIST EN 4531-001:2017

A (without ferrule) B
Key 1 Thread Figure 3 — Drawing for shell sizes 11, 13, 15, 19, 21 and 25
A (without ferrule)
Key 1 Thread Figure 4 — Drawing for shell size 9 SIST EN 4531-001:2017

Figure 5 — Receptacle with female insert
Figure 6 — Receptacle with male insert
A
B (without ferrule) C
Key 1 Thread Figure 7 — Drawing for shell sizes 11, 13, 15, 19, 21 and 25 SIST EN 4531-001:2017

A
B (without ferrule)
Key 1 Thread Figure 8 — Drawing for shell size 9 Table 2 Shell size Ø G Ø T Ø U Ø V Ø W Ø W’ Ø X +0,13 F0,25 +0,25 F0,03 +0,13 F0,03
min. min. 9 7,24 16,51 9,83 12,27 11,99 11,13 10,97 10,59 7,92 11 10,49 19,69 13,06 15,52 15,24 14,38 14,22 13,84 10,92 13 13,39 22,86 15,95 19,31 19,02 17,22 17,07 16,68 13,81 15 16,56 26,04 19,13 22,48 22,20 20,40 20,24 19,86 16,99 19 22,00 32,49 24,69 28,32 28,04 26,24 26,09 25,70 22,42 21 25,17 35,66 27,86 31,50 31,22 29,42 29,26 28,87 25,60 25 31,52 42,01 34,21 37,85 37,57 35,77 35,61 35,22 31,92
A B (without ferrule) C
Key 1 Thread 2 When sleeve is in rear position Figure 9 — Drawing for shell sizes 11, 13, 15, 19, 21 and 25 SIST EN 4531-001:2017

Key 1 Thread 2 When sleeve is in rear position Figure 10 — Drawing for shell size 9 6.3.3 Plug, contact bayonet pin position See Figure 11 for plug with male insert and Figure 12 for plug with female insert.
Figure 11 — Plug with male insert SIST EN 4531-001:2017

Figure 12 — Plug with female insert 6.4 Coupling contact condition See Figure 13.
Key 1 Optical contact to sleeve holder stop 2 Sleeve cavity inner diameter Condition in every case, J > 0 Figure 13 The different shapes and dimensions of the sleeve cavity shall be defined to warrant this condition. SIST EN 4531-001:2017

Figure 14 Table 3 Shell size A max. 9 7,50 11 11,50 13 13,75 15 16,90 19 21,80 21 25,25 25 32,10 SIST EN 4531-001:2017
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