SIST EN 4869-102:2025

Aerospace series - Expanded beam termini, fibre optic non-physical contact in EN 3645 standard cavities - Part 102: Multimode female termini size 16 - Technical specification

This document details the dimensions and performance requirements of a multimode female size 16, non-physical contact expanded beam terminus. This terminus is suitable for use with connectors which have standard size 16 socket crimp contact cavities (series I and III): connectors with cavities for contact of type EN 3155-009F16.

Luft- und Raumfahrt - Strahlaufweitender Anschluss, berührungsloser Lichtwellenleiterkontakt in EN 3645-Standardkontaktkammer - Teil 102: Multimode-Buchsenanschluss, Größe 16 - Technische Lieferbedingungen

Dieses Dokument legt die Maße und Leistungsanforderungen eines berührungslosen Multimode-Buchsenanschlusses der Größe 16 mit strahlaufweitendem Anschluss fest. Dieser Anschluss ist (für die Anwendung) mit Steckverbindern anwendbar, die über Standardkontaktkammern der Größe 16 für crimpbare Buchsenkontakte (Reihe I und III) verfügen: Steckverbinder mit Kontaktkammern für Kontakte des Typs EN 3155 009F16.

Série aérospatiale - Contact à faisceau expansé, fibre optique sans contact physique, dans alvéoles standards EN 3645 - Partie 102 : Contact femelle multimode taille 16 - Spécification technique

Le présent document spécifie les exigences de dimensions et de performances d'une terminaison femelle multimode de taille 16 à faisceau élargi, à contact non physique. Cette terminaison est applicable (à une utilisation) avec des connecteurs disposant de cavités de contact à sertir femelle (séries I et III) de taille 16 standard : connecteurs avec cavités pour contact de type EN 3155 009F16.

Aeronavtika - Razširjeni optični zaključki, nefizični stik optičnih vlaken v standardnih votlinah po standardu EN 3645 - 102. del: Večrodovni ženski zaključki velikosti 16 - Tehnična specifikacija

Ta dokument določa mere in zahtevane lastnosti večrodovnega razširjenega optičnega ženskega zaključka velikosti 16, z nefizičnim stikom. Ta zaključek se uporablja s konektorji, ki imajo standardne votline s 16-vtičnimi kontakti za stiskanje (seriji I in III): konektorji z votlinami za kontakt tipa EN 3155-009F16.

General Information

• Status: Published
• Public Enquiry End Date: 30-May-2023
• Publication Date: 18-Dec-2024
• ICS: 49.090 - On-board equipment and instruments
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 17-Dec-2024
• Due Date: 21-Feb-2025
• Completion Date: 19-Dec-2024
• Ref Project: EN 4869-102:2024 - Aerospace series - Expanded beam termini, fibre optic non-physical contact in EN 3645 standard cavities - Part 102: Multimode female termini size 16 - Technical specification

Overview

EN 4869-102:2024 is a CEN aerospace technical specification for expanded beam termini - specifically a multimode female size 16, non‑physical contact (NPC) fibre optic terminus designed for use in EN 3645 standard size 16 socket crimp contact cavities (series I and III, contact type EN 3155-009F16). The standard defines dimensional, optical and performance requirements needed for qualified use in airborne and spaceborne connector assemblies.

Key topics and technical requirements

• Scope & compatibility: Dimensions and performance for multimode female size 16 expanded beam termini intended for EN 3645 cavities.
• Contact designation: Identity letters for AR coating/wavelength: A = 850 nm, B = 1 300 nm, C = dual 850/1 300 nm.
• AR coating: Applied to two active C‑lens faces; transmittance T > 99.5% (or R < 0.25% per face); coating area must be clean and free from stains.
• Optical interface:
  • Specified beam diameters (1/e) at defined distances for 62.5/125 µm and 50/125 µm multimode fibres.
  • Beam circularity: >96% (62.5 µm) and >98% (50 µm).
  • Air gap between mating lenses: 2.12 ± 0.20 mm.
  • Measurement method: micro‑positioning optical bench with overfilled launch conditions.
• Mechanical & environmental performance:
  • Insertion loss requirement: ≤ 2 dB (single wavelength AR coating) during and after tests.
  • Key tests (per EN 2591 series): endurance at temperature (1 000 h @ 125 °C), damp heat, cold/low pressure cycles, rapid temperature changes, salt mist, immersion at low pressure, axial load (100 N), mechanical endurance (500 mating cycles), durability of seals and contact retention.
• Assembly guidance: Includes cleaning, tooling and termination instructions; rear contact dimensions for qualification cable samples are specified.

Practical applications

• Ensures interchangeable, environmentally robust expanded beam fibre termini for aircraft and spacecraft connectors where a non‑physical contact optical interface is required.
• Typical uses: onboard avionics, in‑aircraft harnesses, space vehicles, military/aerospace communication links, and situations requiring high resistance to contamination, vibration and extreme environments.

Who should use this standard

• Connector and terminus manufacturers
• Aerospace system and harness designers
• Qualification and test laboratories
• Procurement/specification engineers in aviation and space sectors

Related standards

• EN 4869-001 (general qualification for expanded beam termini)
• EN 2591 series (test methods for electrical and optical connections)
• EN 4641 series (aerospace optical cable product standards)
• MIL‑I‑81969/14 (relevant tooling reference)

Keywords: expanded beam termini, multimode female terminus size 16, EN 4869-102, EN 3645 standard cavities, aerospace fibre optic connectors, non‑physical contact, AR coating, insertion loss, environmental testing.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2025
Aeronavtika - Razširjeni optični zaključki, nefizični stik optičnih vlaken v
standardnih votlinah po standardu EN 3645 - 102. del: Večrodovni ženski zaključki
velikosti 16 - Tehnična specifikacija
Aerospace series - Expanded beam termini, fibre optic non-physical contact in EN 3645
standard cavities - Part 102: Multimode female termini size 16 - Technical specification
Luft- und Raumfahrt - Strahlaufweitender Anschluss, berührungsloser
Lichtwellenleiterkontakt in EN 3645-Standardkontaktkammer - Teil 102: Multimode-
Buchsenanschluss, Größe 16 - Technische Lieferbedingungen
Série aérospatiale - Contact à faisceau expansé, fibre optique sans contact physique,
dans alvéoles standards EN 3645 - Partie 102 : Contact femelle multimode taille 16 -
Spécification technique
Ta slovenski standard je istoveten z: EN 4869-102:2024
ICS:
49.090 Oprema in instrumenti v On-board equipment and
zračnih in vesoljskih plovilih instruments
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4869-102
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2024
EUROPÄISCHE NORM
ICS 49.090
English Version
Aerospace series - Expanded beam termini, fibre optic
non-physical contact in EN 3645 standard cavities - Part
102: Multimode female termini size 16 - Technical
specification
Série aérospatiale - Terminaisons à faisceau élargi, Luft- und Raumfahrt - Strahlaufweitender Anschluss,
contact à fibre optique non physique dans des cavités berührungsloser Lichtwellenleiterkontakt in EN 3645-
EN 3645 standard - Partie 102 : Terminaisons femelles Standardkontaktkammer - Teil 102: Multimode-
multimodes taille 16 - Spécification technique Buchsenanschluss, Größe 16 - Technische
Lieferbedingungen
This European Standard was approved by CEN on 19 August 2024.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4869-102:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 6
4 Fibre optic contact designation and dimensions . 6
4.1 Contact designation . 6
4.2 Contact dimensions . 6
4.3 Optical interface . 8
4.4 Cable designation . 9
5 Technical specification . 10
6 Tests according to EN 2591-100 . 10
7 Assembly process instructions . 12
7.1 Cleaning instructions . 12
7.2 Tooling . 12
7.3 Termination instructions . 12
8 Designation . 12
Bibliography . 13

European foreword
This document (EN 4869-102:2024) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by June 2025, and conflicting national standards shall be withdrawn at
the latest by June 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
1 Scope
This document specifies the dimensions and performance requirements of a multimode female size 16,
non-physical contact expanded beam terminus. This terminus is applicable (for use) with connectors
which have standard size 16 socket crimp contact cavities (series I and III): connectors with cavities for
contact of type EN 3155-009F16.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2591-100, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 100: General
EN 2591-304, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 304: Damp heat steady state
EN 2591-312, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 312: Air leakage
EN 2591-407, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 407: Durability of contact retention system and seals
EN 2591-601, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 601: Optical elements — Insertion loss
EN 2591-602, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 602: Optical elements — Variation of attenuation and optical discontinuity
EN 2591-604, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 604: Optical elements — Cleaning capability of optical face
EN 2591-605, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 605: Optical elements — Return loss
EN 2591-607, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 607: Optical elements — Immunity to ambient light coupling
EN 2591-609, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 609: Optical elements — Effectiveness of cable attachment — Cable cyclic flexing
EN 2591-610, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 610: Optical elements — Effectiveness of cable attachment — Cable pulling
EN 2591-611, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 611: Optical elements — Effectiveness of cable attachment — Cable torsion

Published as ASD-STAN prEN at the date of publication of this document, available at:
https://www.asd-stan.org/.
EN 2591-612, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 612: Optical elements — Effectiveness of cable attachment — Cable axial compression
EN 2591-613, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 613: Optical elements — Impact test
EN 2591-617, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 617: Optical elements — Temperature cycling
EN 2591-6301, Aerospace series — Elements of elect
...