kSIST FprEN 4734-102:2024

Aerospace series - Mechanical transfer contact, fibre optic contact Multi connectors - Part 102: MT female contact 12 ways - Technical specification

This document specifies the performance and dimensions of MT female contact 12 ways for EN 4733-001 connector specification.

Luft- und Raumfahrt - Haupt-Element - Teil 102: Technische Lieferbedingungen

Série aérospatiale - Contact à transfert mécanique, connecteurs à contact à fibre optique multivoies - Partie 102 : Contact MT femelle 12 voies - Spécification technique

Le présent document spécifie les performances et les dimensions d’un contact MT femelle 12 voies pour la spécification d’un connecteur EN 4733-001.

Aeronavtika - Mehanski prenosni kontakt, optični kontakt - Multi konektorji - 102. del: MT 12-polni ženski kontakt - Tehnična specifikacija

General Information

• Status: Not Published
• Public Enquiry End Date: 05-May-2024
• ICS: 49.060 - Aerospace electric equipment and systems
• ICS: 49.090 - On-board equipment and instruments
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 04-Nov-2024
• Due Date: 23-Dec-2024
• Completion Date: 04-Nov-2024
• Ref Project: FprEN 4734-102 - Aerospace series - Mechanical transfer contact, fibre optic contact multi connectors - Part 102: MT female contact 12 ways - Technical specification

Overview

The kSIST FprEN 4734-102:2024 standard, titled Aerospace series - Mechanical transfer contact, fibre optic contact multi connectors - Part 102: MT female contact 12 ways - Technical specification, is a comprehensive specification developed by CEN for aerospace-grade optical connectors. It details the performance requirements, dimensions, and assembly instructions for the 12-way MT female fibre optic contacts used in multi-connectors compliant with the EN 4733-001 connector specification.

This standard is critical for ensuring high optical performance, mechanical reliability, and interoperability of fibre optic connectors within aerospace electrical and optical equipment systems. The document aligns with international norms such as CEI-IEC 61754-5 and incorporates stringent test methods from EN 2591.

Key Topics

Contact Composition and Dimensions

• Defines the female MT contact 12 ways structure, including components like the MT ferrule, locking device, springs, crimp band, and cable boots.
• Specifies exact dimensions and mass limits (maximum 5.5 g) to guarantee consistent size and performance.
• Includes polarization keys (color-coded blue S1 and yellow S2) for mechanical and visual identification to prevent mis-mating.

Optical Performance

• Maximum insertion loss: Initial ≤ 0.35 dB, after testing ≤ 0.7 dB per fibre channel.
• Minimum return loss: ≥ 20 dB to ensure signal integrity.
• Defines allowable channel-to-channel variation, ensuring consistency across all 12 fibres.

Mechanical and Environmental Requirements

• Specifies mating forces (7.8 N – 11.8 N) and cable retention strength (minimum 68 N).
• Covers alignment with guide pins and holes to maintain accurate fibre alignment for optimum optical transmission.
• Includes relevant environmental testing protocols such as endurance at 125 °C, rapid temperature cycling, salt mist exposure, and mechanical endurance per EN 2591-100.

Assembly and Maintenance

• Detailed termination instructions for cable preparation, epoxy injection, fibre polishing, and connector assembly ensure repeatability and reliability.
• Provides cleaning procedures using dry air and alcohol swabs to maintain optical surface quality.
• Notes tooling requirements, highlighting that insertion and extraction typically require no special tools except for disassembly operations.

Applications

The kSIST FprEN 4734-102:2024 standard supports the deployment of fibre optic connectors in aerospace and defence electrical systems where reliability and precise optical performance are paramount. Key applications include:

• Aircraft avionics systems – enabling high-speed, noise-immune data transmission.
• Spacecraft communication equipment – ensuring durability under extreme environmental conditions.
• Military and defense platforms – requiring robust, interchangeable connector systems.
• High-reliability fibre optic networks in aircraft wiring harnesses and optical sensor interfaces.

Using standardized MT female contacts specified in kSIST FprEN 4734-102:2024 enables system integrators and manufacturers to ensure interoperability across suppliers and maintain consistent quality throughout the product lifecycle.

Related Standards

This standard references and complements several related documents essential for aerospace fibre optic connector quality:

• EN 4733-001: Connector specification for MT contacts.
• EN 2591 series: Test methods for aerospace electrical and optical connectors.
• EN 4641-501: Product standard for semi loose structure fibre optic cables (2.7 mm outer diameter, 12 optical ways).
• CEI-IEC 61754-5: International fibre optic connector interface standard defining MT connector interface dimensions and interoperability.
• TIA/EIA-598-C: Fiber optic cable color coding guidance referenced for ribbonized fibre preparation.

By aligning with these standards, kSIST FprEN 4734-102:2024 ensures that MT female 12-way contacts meet aerospace industry’s stringent requirements for safety, quality, and environmental resistance.

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Keywords: aerospace fibre optic contacts, MT female contact 12 ways, optical connector standard, EN 4734-102, aerospace connectors, fibre optic multi connectors, mechanical transfer contact, optical insertion loss, fibre optic cable retention, aerospace electrical systems, CEI-IEC 61754-5, EN 2591 testing, aerospace connector assembly instructions

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 4734-102:2024
01-maj-2024
Aeronavtika - Mehanski prenosni kontakt, optični kontakt - Multi konektorji - 102.
del: MT 12-polni ženski kontakt - Tehnična specifikacija
Aerospace series - Mechanical transfer contact, fibre optic contact Multi connectors -
Part 102: MT female contact 12 ways - Technical specification
Luft- und Raumfahrt - Haupt-Element - Teil 102: Technische Lieferbedingungen
Série aérospatiale - Contact à transfert mécanique, connecteurs à contact à fibre optique
multivoies - Partie 102 : Contact MT femelle 12 voies - Spécification technique
Ta slovenski standard je istoveten z: prEN 4734-102
ICS:
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
oSIST prEN 4734-102:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 4734-102:2024
oSIST prEN 4734-102:2024
DRAFT
EUROPEAN STANDARD
prEN 4734-102
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2023
ICS 49.060
English Version
Aerospace series - Mechanical transfer contact, fibre optic
contact Multi connectors - Part 102: MT female contact 12
ways - Technical specification
Aerospace séries - Contact fibre optique multivoies - Luft- und Raumfahrt - Haupt-Element - Teil 102:
Partie 102 : Contact MT femelle 12 fibres - Technische Lieferbedingungen
Spécification technique
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4734-102:2023 E
worldwide for CEN national Members.

oSIST prEN 4734-102:2024
prEN 4734-102:2023 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Fibre optic contact and definition . 5
4.1 Contact composition . 5
4.2 Contact dimensions and mass . 6
4.3 Polarization keys . 7
4.4 Mated contact force . 7
4.5 Alignment . 7
4.6 Interface . 7
4.7 Cable retention . 7
4.8 Mateability . 7
5 Optical performance . 8
5.1 Insertion loss . 8
5.2 Return loss . 8
5.3 Channel to channel consistency . 9
6 Permissible cables . 9
7 Technical specification . 9
8 Tests according to EN 2591-100 . 9
9 Assembly process instructions . 11
9.1 Cleaning instructions . 11
9.2 Tooling . 11
9.3 Termination instructions . 12
10 Designation . 13

oSIST prEN 4734-102:2024
prEN 4734-102:2023 (E)
European foreword
This document (prEN 4734-102:2023) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (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 is currently submitted to the CEN Enquiry.
oSIST prEN 4734-102:2024
prEN 4734-102:2023 (E)
1 Scope
This document specifies the performance and dimensions of MT female contact 12 ways for EN XXXX-
001 connector specification.
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-X, Aerospace series — Elements of electrical and optical connection — Test methods
prEN 4733-001, Aerospace series — Connectors, optical, rectangular, modular — Operating
temperature 125 °C, for EN 4734-10X MT contacts — Part 001: Technical specification
EN 4641-501, Aerospace series — Cable optical — 125 µm diameter cladding — Part 501: Outer diameter
2,7 mm, semi loose structure — 12 optical ways —fibre diameter 50 µm/125 µm — Product standard
CEI-IEC 61754-5, International standard — Fibre optic connector interfaces — Part 5: Type MT connector
family
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 2591-100 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/

As specified in this document.
In preparation at the date of publication of this document.
In preparation at the date of publication of this document.
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