SIST EN 50377-8-3:2007
(Main)Connector sets and interconnect components to be used in optical fibre communication systems - Product specifications -- Part 8-3: LSH-PC simplex terminated on IEC 60793-2-50 category B1.1 and B1.3 singlemode fibre, composite ferrule category C
Connector sets and interconnect components to be used in optical fibre communication systems - Product specifications -- Part 8-3: LSH-PC simplex terminated on IEC 60793-2-50 category B1.1 and B1.3 singlemode fibre, composite ferrule category C
This European Standard contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements which a terminated and assembled singlemode resilient alignment sleeve LSH-PC simplex connector set (plug/adaptor/plug), adaptor and patchcord must meet in order to be categorised as an EN standard product. Since different variants and grades of performance are permitted, product marking details are given in 3.5.
Steckverbindersätze und Verbindungsbauelemente für Lichtwellenleiter-Datenübertragungssysteme - Produktnormen -- Teil 8-3: Bauart LSH-PC-Simplex zum Anschluss an Einmodenfasern der Typen B1.1 und B1.3 nach IEC 60793-2-50 mit Komposit-Stift für die Kategorie C
Jeux de connecteurs et composants d'interconnexion à utiliser dans les systèmes de communication par fibres optiques - Spécifications de produit -- Partie 8-3: Type LSH-PC simplex câblé sur une fibre unimodale des catégories B1.1 et B1.3 de la CEI 60793-2-50, férule composite, catégorie C
1.1 Définition du produit La présente Norme Européenne donne les exigences de performances initiales, dimensionnelles en début de vie, optiques, mécaniques et environnementales auxquelles un jeu de connecteurs de type LSH-PC simplex à manchon d'alignement élastique unimodaux équipés et assemblés (fiche/raccord/fiche), un raccord et un cordon de brassage doivent satisfaire afin d'être classés comme entrant dans une norme EN de produit. Dans la mesure où différentes variantes et différentes classes de performances sont autorisées, les détails de marquage des produits sont donnés en 3.5. 1.2 Compatibilité d'accouplement Bien que tous les produits conformes aux exigences de la présente norme s'accouplent entre eux, le niveau résultant de la performance de dispersion d'affaiblissement est uniquement assuré conformément au Tableau 1. Le but est que cela se vérifie indépendamment des sources de fabrication du produit. Lorsque l’on accouple des variantes de fiche ayant différentes classes d’affaiblissement, on ne peut pas assurer que le niveau d’affaiblissement qui en résulte soit meilleur que celui de la classe d’affaiblissement la moins bonne. L’accouplement d’une fiche de classe C à une fiche de classe B aboutit à un niveau incertain de performance de dispersion d'affaiblissement.
Konektorski sestavi in povezovalne komponente za optične komunikacijske sisteme – Specifikacije izdelka – 8-3. del: Simpleks vrste LSH-PC, zaključen na enorodnem vlaknu IEC 60793-2-50 kategorij B1.1 in B1.3, kompozitna tulka kategorije C
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50377-8-3:2007
01-november-2007
.RQHNWRUVNLVHVWDYLLQSRYH]RYDOQHNRPSRQHQWH]DRSWLþQHNRPXQLNDFLMVNH
VLVWHPH±6SHFLILNDFLMHL]GHOND±GHO 6LPSOHNVYUVWH/6+3&]DNOMXþHQQD
HQRURGQHPYODNQX,(& NDWHJRULM%LQ%NRPSR]LWQDWXOND
NDWHJRULMH&
Connector sets and interconnect components to be used in optical fibre communication
systems - Product specifications -- Part 8-3: LSH-PC simplex terminated on IEC 60793-2
-50 category B1.1 and B1.3 singlemode fibre, composite ferrule category C
Steckverbindersätze und Verbindungsbauelemente für Lichtwellenleiter-
Datenübertragungssysteme - Produktnormen -- Teil 8-3: Bauart LSH-PC-Simplex zum
Anschluss an Einmodenfasern der Typen B1.1 und B1.3 nach IEC 60793-2-50 mit
Komposit-Stift für die Kategorie C
Jeux de connecteurs et composants d'interconnexion a utiliser dans les systemes de
communication par fibres optiques - Spécifications de produit -- Partie 8-3: Type LSH-PC
simplex câblé sur une fibre unimodale des catégories B1.1 et B1.3 de la CEI 60793-2-50,
férule composite, catégorie C
Ta slovenski standard je istoveten z: EN 50377-8-3:2007
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
SIST EN 50377-8-3:2007 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 50377-8-3
NORME EUROPÉENNE
August 2007
EUROPÄISCHE NORM
ICS 33.180.20
English version
Connector sets and interconnect components
to be used in optical fibre communication systems -
Product specifications -
Part 8-3: LSH-PC simplex terminated on IEC 60793-2-50
category B1.1 and B1.3 singlemode fibre,
composite ferrule category C
Jeux de connecteurs et composants Steckverbindersätze
d'interconnexion à utiliser und Verbindungsbauelemente
dans les systèmes de communication für Lichtwellenleiter-
par fibres optiques - Datenübertragungssysteme -
Spécifications de produit - Produktnormen -
Partie 8-3: Type LSH-PC simplex câblé Teil 8-3: Bauart LSH-PC-Simplex zum
sur une fibre unimodale des catégories Anschluss an Einmodenfasern der Typen
B1.1 et B1.3 de la CEI 60793-2-50, B1.1 und B1.3 nach IEC 60793-2-50
férule composite, catégorie C mit Komposit-Stift für die Kategorie C
This European Standard was approved by CENELEC on 2007-03-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50377-8-3:2007 E
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EN 50377-8-3:2007 - 2 -
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 86BXA, Fibre optic
interconnect, passive and connectorised components.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as
EN 50377-8-3 on 2007-03-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-03-01
__________
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- 3 - EN 50377-8-3:2007
Connector sets and interconnect components to be used in optical fibre communication systems -
Product specifications
Part 8-3: LSH-PC simplex terminated on IEC 60793-2-50 category B1.1 and B1.3 singlemode fibre,
composite ferrule category C
Description Performance
Coupling mechanism: Latched push-pull Application: For use in category C (Controlled
environment)
Configuration: Plug/adaptor/plug Attenuation
B: ≤ 0,12 dB mean
grades:
≤ 0,25 dB for > 97 % of
(Random mate)
measurements
Fibre category: EN 60793-2-50
C: ≤ 0,25 dB mean
Types B1.1 and B1.3
≤ 0,50 dB for > 97 % of
measurements
Cable type: See Table 3 Return loss grades:
2: ≥ 45 dB
Related documents:
EN 60794-2 Optical fibre cables - Part 2: Indoor cables - Sectional specification (IEC 60794-2)
EN 61300 series Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures (IEC 61300 series)
EN 61753-1 Fibre optic interconnecting devices and passive components performance standard - Part 1:
General and guidance for performance standards (IEC 61753-1)
EN 61754-15 Fibre optic connector interfaces - Part 15: Type LSH connector family (IEC 61754-15)
EN 61755-1 Fibre optic connector optical interfaces - Part 1: Optical interfaces for single mode non-
dispersion shifted fibres - General and guidance (IEC 61755-1)
EN 61755-3-6 Fibre optic connector optical interfaces - Part 3-6: Optical interface - 2,5 mm and 1,25 mm
diameter cylindrical 8 degrees angled-PC composite ferrule using Cu-Ni-alloy as fibre
surrounding material, single mode fibre (IEC 61755-3-6)
Outline and maximum dimensions:
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EN 50377-8-3:2007 - 4 -
Contents
1 Scope.5
1.1 Product definition .5
1.2 Intermateability.5
1.3 Operating environment.5
1.4 Reliability.5
1.5 Quality assurance .5
2 Normative references .6
3 Description.7
3.1 Plug.7
3.2 Adaptor.7
3.3 Materials.7
3.4 Dimensions.7
3.5 Colour and marking .7
4 Variants.8
4.1 Terminated plug.8
4.2 Adaptor.9
5 Dimensional requirements.10
5.1 Outline dimensions.10
5.2 Mating face and other limit dimensions .14
6 Tests.23
6.1 Sample size.23
6.2 Test and measurement methods .23
6.3 Test sequence.23
6.4 Pass/fail criteria.23
7 Test report .23
8 Testing requirements.24
8.1 Dimensional and marking requirements .24
8.2 Optical performance requirements.24
8.3 Mechanical performance requirements.26
8.4 Environmental performance requirements.30
Annex A (normative) Adaptor matched reference plug details.32
Annex B (informative) Reference connector details .33
Annex C (normative) Sample size and product sourcing requirements.34
Bibliography.35
Figure 1 - Outline dimensions - Plug .10
Figure 2 - Outline dimensions - Adaptor.11
Figure 3 - Mating face and other limit dimensions - Plug.14
Figure 4 - Ferrule end face geometry - After termination.16
Figure 5 - Positioning of fibre core.17
Figure 6 - Ferrule end face geometry - Allowable undercut.18
Figure 7 - Requirements for the attenuation grades for the plug fibre core connected to the ideal reference.19
Figure 8 - Mating face and other dimensions - Adaptor.20
Figure 9 - Pin gauge for adaptor .22
Table 1 - Ensured level of random attenuation .5
Table 2 - Preferred colour scheme.7
Table 3 - Plug variants .8
Table 4 - Adaptor variants.9
Table 5 - Geometrical parameters.17
Table 6 - Optical performance requirements.24
Table 7 - Mechanical performance requirements .26
Table 8 - Environmental performance requirements .30
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- 5 - EN 50377-8-3:2007
1 Scope
1.1 Product definition
This European Standard contains the initial, start of life dimensional, optical, mechanical and environmental
performance requirements which a terminated and assembled singlemode resilient alignment sleeve LSH-PC
simplex connector set (plug/adaptor/plug), adaptor and patchcord must meet in order to be categorised as an EN
standard product.
Since different variants and grades of performance are permitted, product marking details are given in 3.5.
1.2 Intermateability
Although all products conforming to the requirements of this standard will intermate, the resulting level of
random attenuation performance will only be ensured in accordance with Table 1. The intention is that this will
be true irrespective of the manufacturing source(s) of the product.
When intermating plug variants having different attenuation grades, the resulting level of attenuation can not be
assured to be any better than the worst attenuation grade.
The intermating of a grade C plug with a grade B plug will result in an uncertain level of random attenuation
performance.
Table 1 - Ensured level of random attenuation
Plug variant/Attenuation grade C B
C C C
B C B
1.3 Operating environment
The tests selected combined with the severities and durations are representative of a category C environment as
defined in EN 61753-1.
1.4 Reliability
Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this
standard does not guarantee the reliability of the product. This should be predicted using a recognised reliability
assessment programme.
1.5 Quality assurance
Compliance with this standard does not guarantee the manufacturing consistency of the product. This should be
maintained using a recognised quality assurance programme.
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EN 50377-8-3:2007 - 6 -
2 Normative references
The following referenced documents are indispensable for the application 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 60793-2-50 Optical fibres - Part 2-50: Product specifications - Sectional specification for class B
single-mode fibres (IEC 60793-2-50)
EN 61300-2-1 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-1: Tests - Vibration (sinusoidal) (IEC 61300-2-1)
EN 61300-2-2 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-2: Tests - Mating durability (IEC 61300-2-2)
EN 61300-2-4 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-4: Tests - Fibre/cable retention (IEC 61300-2-4)
EN 61300-2-5 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-5: Tests - Torsion/twist (IEC 61300-2-5)
EN 61300-2-6 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-6: Tests - Tensile strength of coupling mechanism
(IEC 61300-2-6)
EN 61300-2-12 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-12: Tests - Impact (IEC 61300-2-12)
EN 61300-2-17 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-17: Tests - Cold (IEC 61300-2-17)
EN 61300-2-18 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-18: Tests - Dry heat - High temperature endurance
(IEC 61300-2-18)
EN 61300-2-19 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-19: Tests - Damp heat (steady state) (IEC 61300-2-19)
EN 61300-2-22 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-22: Tests - Change of temperature (IEC 61300-2-22)
EN 61300-2-42 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-42: Tests - Static side load for connectors
(IEC 61300-2-42)
EN 61300-2-44 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 2-44: Tests - Flexing of the strain relief of fibre optic
devices (IEC 61300-2-44)
EN 61300-3-4 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-4: Examinations and measurements - Attenuation
(IEC 61300-3-4)
EN 61300-3-6 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-6: Examinations and measurements - Return loss
(IEC 61300-3-6)
EN 61300-3-10 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-10: Examinations and measurements - Gauge retention
force (IEC 61300-3-10)
EN 61300-3-15 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-15: Examinations and measurements - Eccentricity of a
convex polished ferrule endface (IEC 61300-3-15)
EN 61300-3-16 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-16: Examinations and measurements - Endface radius
of spherically polished ferrules (IEC 61300-3-16)
EN 61300-3-23 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-23: Examinations and measurements - Fibre position
relative to ferrule endface (IEC 61300-3-23)
EN 61300-3-34 Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-34: Examinations and measurements - Attenuation of
random mated connectors (IEC 61300-3-34)
EN 61753-1 Fibre optic interconnecting devices and passive components performance standard - Part
1: General and guidance for performance standards (IEC 61753-1)
EN 61754-15 Fibre optic connector interfaces - Part 15: Type LSH connector family (IEC 61754-15)
EN 61755-1 Fibre optic connector optical interfaces - Part 1: Optical interfaces for single mode non-
dispersion shifted fibres - General and guidance (IEC 61755-1)
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- 7 - EN 50377-8-3:2007
3 Description
The LSH-PC connector is a single position plug connector set of plug/adaptor/plug configuration characterised
by a cylindrical, spring loaded butting ferrule of 2,5 mm nominal diameter and a latched push-pull coupling
mechanism. The optical alignment mechanism of the connectors is of a resilient sleeve style.
3.1 Plug
The plug features a cylindrical composite ferrule using Cu-Ni-alloy as fibre surrounding material and a push-pull
mechanism. It has a single male key which is used to limit and may be used to orientate, the relative rotation
between mated connectors. The plug has mechanical and colour coding.
Alternative materials may be used for the ferrule that have directly compatible material properties to the specified
materials but the end face and performance requirements must be met under all conditions.
3.2 Adaptor
The adaptor has a zirconia ceramic resilient alignment sleeve. The mounting style can be:
i square flange - 2 hole fixing;
ii square flange - side clip fixing;
iii square flange - top bottom clip fixing.
Covers (dust caps) shall be provided to protect each port of the adaptor. The adaptor has a mechanical colour
coding.
Alternative material may be used for the sleeve that have directly compatible material properties to zirconia but
the performance requirements must be met under all conditions
3.3 Materials
Materials which are not specified or which are not specifically described are left to the discretion of the
manufacturer.
3.4 Dimensions
Outline dimensions and other dimensions necessary to ensure inter mateability or which affect performance are
specified. All other dimensions are left to the discretion of the manufacturer. Where the mating face limit
dimensions are not in agreement with an EN Interface Standard this is clearly stated.
3.5 Colour and marking
Marking of the product shall be in the following order of precedence:
- identification of manufacturer;
- manufacturing date code: year/week;
- manufacturers part number;
- variant identification number.
The following colour scheme is preferred:
Table 2 - Preferred colour scheme
Adaptor Delatch housing
Blue Blue
Preferred RAL number 5015
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EN 50377-8-3:2007 - 8 -
4 Variants
4.1 Terminated plug
The following variants are permitted:
Table 3 - Plug variants
E N 5 0377 - 8 - 3 -* * * - * 1
No. Structure
Fibre/Cable ∅
mm
01 0,6 - 1,4 Buffered fibre
02 2,0 ± 0,2 Reinforced cable
03 2,5 ± 0,2 Reinforced cable
04 Reinforced cable
2,8 ± 0,2
05 Reinforced cable
3,0 ± 0,2
06 3,2 ± 0,2 Reinforced cable
Mechanical Colour code for the Note
code latch
0 Green See note, not coded
1 Red, RAL 3020
2 Brown, RAL 8004
3 Yellow, RAL 1016
4 Orange, RAL 2003
5 Violet, RAL 4008
6 White, RAL 9010
NOTE Universal, intermatable to all mechanical and colour coded adaptors.
Code Attenuation grade
B B
C C
Code Return loss grade
1 2
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- 9 - EN 50377-8-3:2007
4.2 Adaptor
The following variants are permitted:
Table 4 - Adaptor variants
E N 5 0 3 7 7 - 8 - 3 - D * **
No. Format
01 Square flange 2 hole screw fixing
02 Square flange side clip fixing
03 Square flange top-bottom clip fixing
Mechanical Colour code for the frame Note
code
0 Green See note, not coded
1 Red, RAL 3020
2 Brown, RAL 8004
3 Yellow, RAL 1016
4 Orange, RAL 2003
5 Violet, RAL 4008
6 White, RAL 9010
NOTE Universal, intermatable to all mechanical and colour coded plugs.
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EN 50377-8-3:2007 - 10 -
5 Dimensional requirements
5.1 Outline dimensions
5.1.1 Plug variants
Variant No. 01* (*, third digit related to mechanical coding)
Ref. Dimensions Note
min. mm max.
A - 34
See note
B - 60
C 0,7 1,4
D - 13,05
E 5,95 5,98
NOTE Rigid length.
Variant No. 02*/03*/04*/05*/06*
Ref. Dimensions Note
min. mm max.
A - 38 See note
B - 60
C 1,8 3,5
D - 13,05
E 5,95 5,98
NOTE Rigid length.
Figure 1 - Outline dimensions - Plug
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- 11 - EN 50377-8-3:2007
5.1.2 Adaptor variants
Variant No. D01*(*, fourth character related to mechanical coding)
Ref. Dimensions Note
min. mm max.
A 41,7 42,5
B 19,0 19,4
C - 9
D - 22,1
E - 13,05
G 13,1 13,5
H 9,6 10,0
I 17,9 18,1
L 2,2 2,4 Diameter
Figure 2 - Outline dimensions - Adaptor
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EN 50377-8-3:2007 - 12 -
Variant No. D02*
Ref. Dimensions Note
min. mm max.
A 41,7 42,5
B 19,0 19,4
C - 9
D - 22,2
E - 13,1
F 1,3 1,6
G 13,1 13,5
H 9,6 10,0
K - 9,6
Figure 2 - Outline dimensions - Adaptor (continued)
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- 13 - EN 50377-8-3:2007
Variant No. D03*
Ref. Dimensions Note
min. mm max.
A 41,7 42,5
B 19,0 21,4
C - 9
D - 22,2
E - 13,1
F 1,3 1,6
G 13,1 13,5
H 9,6 10,0
Figure 2 - Outline dimensions - Adaptor (continued)
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EN 50377-8-3:2007 - 14 -
5.2 Mating face and other limit dimensions
5.2.1 Plug
Mechanical reference plane
Open (closed
see detail X)
Optical datum
target
Ferrule
2
Closed
Detail X
Universal
View from direction B (mechanical color coding according to Table 2) only latch
Figure 3 - Mating face and other limit dimensions - Plug
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- 15 - EN 50377-8-3:2007
Ref. Dimensions Note
min. mm max.
A - - Diameter 2, 3, table in
Figure 5
B 4,45 4,55 Diameter
C 6,25 6,29
D 8,82 8,88
E 2,75 2,79
F 2,95 2,99
G 0,67 1,0
I 4,93 4,98
J 4,13 4,18
K 45 60 Angle in degrees
L 6,1 6,5
M (free) 12,05 - 1
M (mated) 11,9 - 1
N 10,9 11,05
O 0,9 1,5
P 4,5 5,0
Q 3,9 4,1
R 1,2 1,5
S 1,25 1,35
T 25 36 Angle in degrees
U 6,8 7,2
V 8,2 8,4
AA 0,9 1,3
AB 2,5 2,8
AF 2,2 2,3
AG 1,15 1,2
AM 3,0 3,1
AN 0,1 0,3
AO 1,5 2,0
AR 6,1 6,2
AS 2,8 3,5
AT 1,65 1,7
CA 0,99 1,01
CB 0,49 0,51
CC 1,49 1,51
CD 1,96 2,04
CE 0,95 1,05
NOTE 1 Dimension M (free) refers to the plug in the unmated condition. Dimension M (mated) varies according to
the axial compression generated when mated. The axial compression force shall be between 7,8 N and 11,8 N when
dimension M (mated) is between 12,0 mm and 11,9 mm.
NOTE 2 Envelope condition in accordance with ISO 8015.
NOTE 3 Surface roughness Ra ≤ 0,1 µm.
Figure 3 - Mating face and other limit dimensions - Plug (continued)
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EN 50377-8-3:2007 - 16 -
5.2.2 Ferrule endface geometry and fibre core position after termination
C
A
B
Figure 4 - Ferrule end face geometry - After termination
---------------------- Page: 17 ----------------------
- 17 - EN 50377-8-3:2007
F
Figure 5 - Positioning of fibre core
Table 5 - Geometrical parameters
Ref. Parameter values Notes
Grade B Grade C
min. mm max. min. mm max.
A -200 see Figure 6 -200 see Figure 6 1, 2, nm
B 7 20 7 20 4, Radius
C 0 50 0 50 3, µm
D 2,499 0 2,499 5 2,498 5 2,499 5 Diameter
E 0 0,6 0 0,8 Degrees
F 0 0,000 15 0 0,000 3 Radius
J 0,8 0,8
- -
K - 1,8 - 1,8
NOTE 1 Contact force 4,9 N minimum. Ferrule material: Cu-Ni-alloy. Nominal material physical constant values:
Young’s Modulus, E = 127 GPa, Poisson’s Ratio, ν = 0,35.
NOTE 2 A negative value indicates fibre protrusion.
NOTE 3 The dimension C shall be measured in both extreme positions of the ferrule when the ferrule is rotated in the
connector.
NOTE 4 The radius and fibre undercut shall be measured in all directions over a diameter of 0,25 mm.
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EN 50377-8-3:2007 - 18 -
300
Allowable undercut for 4,9 [N]
250
Apex offset 50 µm
200
150
100
50
0
4 6 8 10 12 14 16 18 20
End face radius [mm]
()−0.695 6 2 6 2 3
Α = 1862 ⋅ B − B ⋅10 + ( B ⋅10 − C )⋅10 −130
Maximum
Figure 6 - Ferrule end face geometry - Allowable undercut
Allowable undercut [nm]
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- 19 - EN 50377-8-3:2007
5.2.3 Control of fibre core position and axis
Figure 7 shows the relationship between the axis of the fibre and the position of the fibre core relative to the
optical datum (see 5.2.2).
1.2
Grade C
1.1
1.0
0.9
Grade B
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Offset b
...
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