EN 50377-7-4:2011

SLOVENSKI STANDARD
01-julij-2011
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SIST EN 50377-7-4:2004
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Connector sets and interconnect components to be used in optical fibre communication
systems - Product specifications - Part 7-4: LC-PC simplex terminated on IEC 60793-2-
50 category B1.1 and B1.3 singlemode fibre with full zirconia ferrule for Category C
Steckverbindersätze und Verbindungsbauelemente für Lichtwellenleiter-
Datenübertragungssysteme - Produktnormen - Teil 7-4: Bauart LC-PC-Simplex zum
Anschluss an Einmodenfasern der Kategorien B1.1 und B1.3 nach IEC 60793-2-50 mit
Zirkonium-Stift für die Kategorie C
Jeux de connecteurs et composants d'interconnexion à utiliser dans les systèmes de
communication par fibres optiques – Spécifications de produits - Partie 7-4: Type simplex
LC-PC câblé sur une fibre unimodale des catégories B1.1 et B1.3 de la CEI 60793-2-50,
avec férule en zircone, catégorie C
Ta slovenski standard je istoveten z: EN 50377-7-4:2011
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50377-7-4
NORME EUROPÉENNE
May 2011
EUROPÄISCHE NORM
ICS 33.180.20 Supersedes EN 50377-7-4:2004

English version
Connector sets and interconnect components to be used in optical fibre
communication systems -
Product specifications -
Part 7-4: LC-PC simplex terminated on IEC 60793-2-50 category B1.1 and
B1.3 singlemode fibre with full zirconia ferrule for category C

Jeux de connecteurs et composants Steckverbindersätze und
d'interconnexion à utiliser dans les Verbindungsbauelemente für
systèmes de communication par fibres Lichtwellenleiter-
optiques – Spécifications de produits - Datenübertragungssysteme -
Partie 7-4: Type simplex LC-PC câblé sur Produktnormen -
une fibre unimodale des catégories B1.1 Teil 7-4: Bauart LC-PC-Simplex zum
et B1.3 de la CEI 60793-2-50, avec férule Anschluss an Einmodenfasern der
en zircone, catégorie C Kategorien B1.1 und B1.3 nach
IEC 60793-2-50 mit Zirkoniumdioxyd-
Ferrule für die Kategorie C
This European Standard was approved by CENELEC on 2011-01-02. 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, Croatia, 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

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50377-7-4:2011 E
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 formal vote and was approved by CENELEC as
EN 50377-7-4 on 2011-01-02.
This document supersedes EN 50377-7-4:2004.
This document is updated to include the performance of the adaptor, and patch cord next to the pigtailed
connector as defined in the previous version. It also includes latest attenuation and return loss grades as
specified in IEC.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.
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) 2012-01-02
– latest date by which the national standards conflicting

with the EN have to be withdrawn
(dow) 2012-01-02
__________
– 3 – EN 50377-7-4:2011
Connector sets and interconnect components to be used in optical fibre communication systems –
Product specifications
Part 7-4: LC-PC simplex terminated on IEC 60793-2-50 singlemode category B1.1 and B1.3 singlemode fibre
with full zirconia ferrule for category C
Description Performance
Coupling mechanism: Latch push-pull Application: EN 61753-1:2007, category C
(controlled environment)
Configuration: Plug / adaptor / plug Attenuation grade:
B: ≤ 0,12 dB mean
(random mate)
≤ 0,25 dB for ≥ 97 % of
Fibre category: EN 60793-2-50
measurements
Types B1.1 and B1.3
C: ≤ 0,25 dB mean
≤ 0,50 dB for ≥ 97 % of
measurements
Cable type: See Table 3 Return loss grade: 2: ≥ 45 dB
(random mate)
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 61754-20 Fibre optic connector interfaces – Part 20: Type LC connector family
(IEC 61754-20)
ETSI TS 100 671 Transmission and Multiplexing (TM); Passive optical components; Optical fibre connectors for
single-mode optical fibre communication systems; Common requirements and conformance
testing
ETSI EN 300 019 Environmental Engineering (EE) – Environmental conditions and environmental tests for
series telecommunications equipment
Outline and maximum dimensions:
57 Ref. 76 Ref.
32 Max. 51 Max.
R25 Min. R25 Min.
Contents
1 Scope . 6
1.1 Product definition . 6
1.2 Intermateability . 6
1.3 Operating environment . 6
1.4 Reliability . 6
1.5 Quality assurance . 6
2 Normative references . 7
3 Description . 8
3.1 General . 8
3.2 Plug . 8
3.3 Adaptor . 8
3.4 Materials . 8
3.5 Dimensions . 8
3.6 Colour and marking . 8
4 Variants . 9
4.1 Terminated plug . 9
4.2 Adaptor . 9
4.3 Identification of variants . 10
5 Dimensional requirements . 11
5.1 Outline dimensions . 11
5.2 Mating face and other limit dimensions . 16
6 Tests . 25
6.1 Sample size . 25
6.2 Test and measurement methods . 26
6.3 Test sequence . 26
6.4 Pass/Fail criteria . 26
7 Test report . 26
8 Product qualification requirements . 26
8.1 Dimensional and marking requirements. 26
8.2 Optical performance requirements . 27
8.3 Mechanical performance requirements . 29
8.4 Environmental performance requirements . 33
Annex A (normative) Adaptor matched reference plug details . 35
Annex B (normative) Reference connector details . 36
Annex C (normative) Sample size and product sourcing requirements . 37
Annex D (informative) Zirconia ferrule response surface . 38
Bibliography . 39
Figures
Figure 1 – Outline dimensions – Plug variants . 11
Figure 2 – Outline dimensions – Adaptor variants . 15
Figure 3 – Plug mating face and other limit dimensions . 17
Figure 4 – Ferrule endface geometry – After termination . 20
Figure 5 – Positioning of fibre core centre to ferrule centre and connector key . 21

– 5 – EN 50377-7-4:2011
Figure 7 – Dimensions of the simplex adaptor connector interface. 23
Figure 8 – Pin gauge for adaptor . 25
Figure D.1 – Radius vs. undercut and apex offset. 38

Tables
Table 1 – Ensured level of random attenuation . 6
Table 2 – Preferred colour scheme . 9
Table 3 – Plug fibre/cable variants with fibre category IEC 60793-2 Type B1.1 . 9
Table 4 – Adaptor variants . 9
Table 5 – Identification plug fibre/cable, C grade variants with fibre category IEC 60793-2 . 10
Table 6 – Identification plug fibre/cable, B grade variants with fibre category IEC 60793-2 . 10
Table 7 – Adaptor variants . 10
Table 8 – Optical performance requirements . 27
Table 9 – Mechanical performance requirements . 29
Table 10 – Environmental performance requirements . 33
Table A.1 – Adaptor matched reference plug details. 35
Table B.1 – Reference plug . 36
Table C.1 – Sample size and product sourcing requirements . 37

1 Scope
1.1 Product definition
This European Standard contains the initial, start of life dimensional, optical, mechanical and environmental
performance requirements which a connector terminated with cylindrical zirconia PC ferrule and assembled
singlemode resilient alignment sleeve LC-PC simplex connector set (plug / adaptor / plug) adaptor and
patchcord must meet in order for it to be categorised as an EN standard product.
Since different variants and grades of performance are permitted, product marking details are given in 3.6.
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 cannot
be assured to be any better than the worst attenuation grade.
Therefore, 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
Attenuation grade C B
C C C
B C B
A simplex plug can be connected in a duplex adaptor without degrading the level of performance.
1.3 Operating environment
The tests selected combined with the severities and durations are representative of an internal weather
protected environment defined by EN 61753-1:2007, Category C.
1.4 Reliability
Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with
this European 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 European Standard does not guarantee the manufacturing consistency of the product.
This should be maintained using a recognised quality assurance programme.

– 7 – EN 50377-7-4:2011
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 60874-1:2007 Connectors for optical fibres and cables - Part 1: Generic specification
(IEC 60874-1:2006)
EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures (IEC 61300 series)
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 Part 2-2: Tests – Mating durability (IEC 61300-2-2)
EN 61300-2-4 Part 2-4: Tests – Fibre/cable retention (IEC 61300-2-4)
EN 61300-2-6 Part 2-6: Tests – Tensile strength of coupling mechanism (IEC 61300-2-6)
EN 61300-2-12:2009 Part 2-12: Tests – Impact (IEC 61300-2-12:2009)
EN 61300-2-17 Part 2-17: Tests – Cold (IEC 61300-2-17)
EN 61300-2-18 Part 2-18: Tests – Dry heat – High temperature endurance (IEC 61300-2-18)
EN 61300-2-19 Part 2-19: Tests – Damp heat (steady state) (IEC 61300-2-19)
EN 61300-2-22 Part 2-22: Tests – Change of temperature (IEC 61300-2-22)
EN 61300-2-42 Part 2-42: Tests – Static side load for connectors (IEC 61300-2-42)
EN 61300-2-44 Part 2-44: Tests – Flexing of the strain relief of fibre optic devices (IEC 61300-2-44)
EN 61300-3-4 Part 3-4: Examinations and measurements – Attenuation (IEC 61300-3-4)
EN 61300-3-6:2009 Part 3-6: Examinations and measurements – Return loss (IEC 61300-3-6:2008)
EN 61300-3-10 Part 3-10: Examinations and measurements – Gauge retention force
(IEC 61300-3-10)
EN 61300-3-15 Part 3-15: Examinations and measurements - Dome eccentricity of a convex
polished ferrule endface (IEC 61300-3-15)
EN 61300-3-16 Part 3-16: Examinations and measurements - Endface radius of spherically polished
ferrules (IEC 61300-3-16)
EN 61300-3-23 Part 3-23: Examination and measurements – Fibre position relative to ferrule end-
face (IEC 61300-3-23)
EN 61300-3-28 Part 3-23: Examinations and measurements – Transient loss (IEC 61300-3-28)
EN 61300-3-34 Part 3-34: Examinations and measurements – Attenuation of random mated
connectors (IEC 61300-3-34)
EN 61300-3-42 Part 3-42: Examinations and measurements – Attenuation of single mode alignment
sleeves and or adaptors with resilient alignment sleeves (IEC 61300-3-42)
EN 61753-1:2007 Fibre optic interconnecting devices and passive components performance standard –
Part 1: General and guidance for performance standards (IEC 61753-1:2007)

3 Description
3.1 General
The LC-PC simplex connector is a single position plug connector set of plug adaptor plug configuration
characterised by cylindrical, spring loaded butting ferrules of 1,25 mm nominal diameter and a latched push-
pull coupling mechanism. The optical alignment mechanism of the connectors is of a resilient sleeve style.
3.2 Plug
The plug features a cylindrical zirconia ceramic ferrule and a latched 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.
A cover (dust cap) to protect the ferrule endface when the connector is in the unmated condition shall be
provided.
Alternative materials may be used for the ferrule that have directly compatible material properties to zirconia
but the endface and performance requirements must be met under all conditions
3.3 Adaptor
The adaptor has a zirconia ceramic resilient alignment sleeve. The mounting styles are simplex rectangular
flange equipped with snap-latches, duplex square flange equipped with snap-latches, and a duplex
rectangular flange with snap-latches with a panel cut out same as SC connector.
Covers (dust caps) shall be provided to protect each port of the adaptor.
Alternative materials may be used for the sleeve that has directly compatible material properties to zirconia
but the performance requirements must be met under all conditions
3.4 Materials
Materials which are not specified or which are not specifically described are left to the discretion of the
manufacturer.
3.5 Dimensions
Outline dimensions and other dimensions necessary to ensure intermateability 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 IEC interface standard this is clearly stated.
3.6 Colour and marking
Marking of the product shall be in accordance with EN 60874-1:2007, 4.7, in the following order of
precedence:
– identification of manufacturer;
– manufacturing date code: year/week;
– manufacturers part number;
– variant identification number.

– 9 – EN 50377-7-4:2011
The following colour scheme is preferred.
Table 2 – Preferred colour scheme
Terminated plug Adaptor
Blue Blue
4 Variants
4.1 Terminated plug
The following variants are permitted:
Table 3 – Plug fibre/cable variants with fibre category IEC 60793-2 Type B1.1
E N 5 0 3 7 7 - 7 - 4 - * *
Variant number Fibre/Cable Structure
∅ mm
C01 0,7 – 1,4 Buffered fibre
C02 1,6 ± 0,2 Reinforced cable
C03 Reinforced cable
2,0 ± 0,2
C04 Reinforced cable
2,5 ± 0,2
C05 3,0 ± 0,2 Reinforced cable
B01 0,7 – 1,4 Buffered fibre
B02 Reinforced cable
1,6 ± 0,2
B03 2,0 ± 0,2 Reinforced cable
B04 Reinforced cable
2,5 ± 0,2
B05 Reinforced cable
3,0 ± 0,2
4.2 Adaptor
The following variants are permitted:
Table 4 – Adaptor variants
Variant number Format
A01 Rectangular flange – Simplex
A02 Square flange – Duplex
A03 Rectangular flange – Duplex
A04 Rectangular flange – Quad
4.3 Identification of variants
Table 5 – Identification plug fibre/cable, C grade variants with
fibre category IEC 60793-2
Variant number Performance grade Identification number
(return loss)
C01 2 EN50377-7-4-C01-2
C02 2 EN50377-7-4-C02-2
C03 2 EN50377-7-4-C03-2
C04 2 EN50377-7-4-C04-2
C05 2 EN50377-7-4-C05-2
Table 6 – Identification plug fibre/cable, B grade variants with fibre
category IEC 60793-2
Variant number Performance grade Identification number
(return loss)
B01 2 EN50377-7-4-B01-2
B02 2 EN50377-7-4-B02-2
B03 2 EN50377-7-4-B03-2
B04 2 EN50377-7-4-B04-2
B05 2 EN50377-7-4-B05-2
Table 7 – Adaptor variants
Variant number Identification number
A01 EN50377-7-4-A01
A02 EN50377-7-4-A02
A03 EN50377-7-4-A03
A04 EN50377-7-4-A04
– 11 – EN 50377-7-4:2011
5 Dimensional requirements
5.1 Outline dimensions
5.1.1 Plug variants
Variant number: B01/C01
Ref. Dimensions Note
min. mm max.
PA – 30
PB – 32
PC – 9,4
a)
Variant number: B02 – B05, C02 – C05

Ref. Dimensions Note
min. mm max.
CA – 49 Not including
heat-shrink tube
CB – 51
CC – 10,5
b)
Figure 1 – Outline dimensions – Plug variants

5.1.2 Adaptor variants
Variant number: A01
Optical  plane
Panel cutout
DL
DM
See NOTE
DH
DF DK
DG DB
DE
DI
DC
DJ
DD
DA
Ref. Dimensions Note
min. mm max.
DA 25,0 30,0
DB 11,5 11,6
DC 6,9 7,0
DD 7,1 7,2
DE 11,7 11,8
DF - 13,3
DG - 10,3
DH - 3,8
DI Approximate 1,5 See NOTE
DJ 12,6 12,9
DK 13,1 13,2
DL 11,0 12,8
DM 11,0 12,8
NOTE Panel cutout: panel thickness should be between 1,0 mm and 1,5 mm.
Figure 2 a) Variant A01 outline dimensions – Simplex adaptor

– 13 – EN 50377-7-4:2011
Variant number: A02
Optical plane
Panel cutout
EM
EL
See NOTE
EH
EF
EG EB EK
EE
EI
EN
EJ
EC
ED
EA
Ref. Dimensions Note
min. mm max.
EA 25,0 30,0
EB 13,0 13,1
EC 13,0 13,1
ED 13,2 13,4
EE 13,2 13,4
EF - 15,3
EG 9,4 13,1
EH - 3,8
EI Approximate 1,5 See NOTE
EJ 12,6 12,9
EK 14,5 14,9
EL 11,0 12,8
EM 11,0 12,8
EN 6,25 Basic dimension
NOTE Panel cutout: panel thickness should be between 1,0 mm and 1,5 mm.
Figure 2 b) Variant A02 outline dimensions – Duplex square flange adaptor

Variant number: A03
Panel cutout
See Note
Optical plane
Ref. Dimensions Note
min. mm max.
FA 25,0 30,0
FB 9,35 9,45
FC 12,8 12,9
FD 13,1 13, 5
FE 9,5 10,0
FF - 15,3
FG 17,9 18,1
FH - 3,8
FI Approximate 1,5 See NOTE
FJ 16,3 16,6
FK 14,5 14,9 Dimension over
latches
FL 11,0 12,8
FM 11,0 12,8
FN 6,25 Basic dimension
FP 2,39 2,59 Holes optional
NOTE Panel cutout: panel thickness should be between 1,0 mm and 1,5 mm.
Figure 2 c) Variant A03 outline dimensions – Duplex rectangular flange adaptor

– 15 – EN 50377-7-4:2011
Variant number: A04
Panel cutout
GC
See NOTE
GB
G
Except as noted: Flange not shown
Side view is same as Figure 2c
GD
Panel thickness GI
GE
GP
GD
GG
Ref. Dimensions Note
min. mm max.
GB 9,35 9,45
GC 25,6 25,9
GD 26,0 26,5
GE 9,5 10,0
GG 30,6 30,8
GI Approximate 1,5 See NOTE
GN 6,25 Basic dimension
GP 2,39 2,59 Holes optional
NOTE Panel cutout: panel thickness should be between 1,0 mm and 1,5 mm.
Figure 2 d) Variant A04 outline dimensions – Quad rectangular flange adaptor
Figure 2 – Outline dimensions – Adaptor variants
...