Bsi bs en 61754 28 2012
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BS EN 61754-28:2012
BSI Standards Publication
Fibre optic interconnecting
devices and passive
components — Fibre optic
connector interfaces
Part 28: Type LF3 connector family
BRITISH STANDARD
BS EN 61754-28:2012
National foreword
This British Standard is the UK implementation of EN 61754-28:2012. It is
identical to IEC 61754-28:2012.
The UK participation in its preparation was entrusted by Technical Committee
GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic interconnecting
devices and passive components.
A list of organizations represented on this committee can be obtained on
request to its secretary.
This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.
© The British Standards Institution 2012
Published by BSI Standards Limited 2012
ISBN 978 0 580 73812 8
ICS 33.180.20
Compliance with a British Standard cannot confer immunity from
legal obligations.
This British Standard was published under the authority of the Standards
Policy and Strategy Committee on 31 August 2012.
Amendments issued since publication
Amd. No.
Date
Text affected
BS EN 61754-28:2012
EUROPEAN STANDARD
EN 61754-28
NORME EUROPÉENNE
July 2012
EUROPÄISCHE NORM
ICS 33.180.20
English version
Fibre optic interconnecting devices and passive components Fibre optic connector interfaces Part 28: Type LF3 connector family
(IEC 61754-28:2012)
Dispositifs d'interconnexion et composants
passifs à fibres optiques Interfaces de connecteurs pour fibres
optiques Partie 28: Famille de connecteurs de type
LF3
(CEI 61754-28:2012)
Lichtwellenleiter Verbindungselemente und passive
Bauteile Steckgesichter von LichtwellenleiterSteckverbindern Teil 28: Steckverbinderfamilie der Bauart
LF3
(IEC 61754-28:2012)
This European Standard was approved by CENELEC on 2012-06-19. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre 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, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey 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
© 2012 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61754-28:2012 E
BS EN 61754-28:2012
EN 61754-28:2012
-2-
Foreword
The text of document 86B/3387/FDIS, future edition 1 of IEC 61754-28, prepared by SC 86B, "Fibre optic
interconnecting devices and passive components", of IEC TC 86, "Fibre optics" was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN 61754-28:2012.
The following dates are fixed:
•
•
latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
latest date by which the national
standards conflicting with the
document have to be withdrawn
(dop)
2013-03-19
(dow)
2015-06-19
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61754-28:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
ISO 8015
NOTE Harmonized as EN ISO 8015.
-3-
BS EN 61754-28:2012
EN 61754-28:2012
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication
Year
Title
IEC 60794-2-50
-
Optical fibre cables EN 60794-2-50
Part 2-50: Indoor cables - Family specification
for simplex and duplex cables for use in
terminated cable assemblies
EN/HD
Year
-
–2–
BS EN 61754-28:2012
61754-28 IEC:2012
CONTENTS
INTRODUCTION ..................................................................................................................... 5
1
Scope ............................................................................................................................... 6
2
Normative reference ......................................................................................................... 6
3
Description ....................................................................................................................... 6
4
Interfaces ......................................................................................................................... 6
Annex A (informative) Panel cutout ....................................................................................... 18
Bibliography .......................................................................................................................... 19
Figure 1 – Simplex plug interface ............................................................................................ 8
Figure 2 – APC/PC endface geometry ..................................................................................... 9
Figure 3 – Duplex plug interface .............................................................................................. 9
Figure 4 – Simplex adaptor interface ..................................................................................... 12
Figure 5 – Duplex adaptor interface ....................................................................................... 12
Figure 6 – Pin gauge for adaptor ........................................................................................... 14
Figure 7 – Simplex active device receptacle interface ............................................................ 15
Figure 8 – Duplex active device receptacle interface .............................................................. 15
Figure A.1 – Simplex and duplex adaptor cutout .................................................................... 18
Table 1 – Intermateability between plugs, adaptors and active device within the
IEC 61754-28 family ................................................................................................................ 7
Table 2 – Dimensions of plug connector interface (1 of 2) ...................................................... 10
Table 3 – Ferrule grade table for plug connector interface ..................................................... 11
Table 4 – Dimensions of the simplex and duplex adaptor interface......................................... 13
Table 5 – Gauge pin dimensions ........................................................................................... 14
Table 6 – Dimensions of active device interface .................................................................... 16
Table 7 – Grade table............................................................................................................ 17
Table A.1 – Dimensions of the simplex and duplex adaptor cutout ......................................... 18
BS EN 61754-28:2012
61754-28 IEC:2012
–5–
INTRODUCTION
The International Electrotechnical Commission (IEC) draws attention to the fact that it is
claimed that compliance with this document may involve the use of a patent concerning
IEC 61754-28.
IEC takes no position concerning the evidence, validity and scope of this patent right. The
holder of this patent right has assured the IEC that he/she is willing to negotiate licences under
reasonable and non - discriminatory terms and conditions with applicants throughout the world.
In this respect, the statement of the holder of this patent right is registered with IEC.
Information may be obtained from:
DIAMOND SA
Via dei Patrizi 5
6616 Losone
Switzerland
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those identified above. IEC shall not be held responsible for
identifying any or all such patent rights.
ISO (www.iso.org/patents) and IEC ( maintain on-line
data bases of patents relevant to their standards. Users are encouraged to consult the data
bases for the most up to date information concerning patents.
–6–
BS EN 61754-28:2012
61754-28 IEC:2012
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –
Part 28: Type LF3 connector family
1
Scope
This part of IEC 61754 defines the standard interface dimensions for the type LF3 family of
connectors.
2
Normative reference
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.
IEC 60794-2-50, Optical fibre cables – Part 2-50: Indoor cables – Family specification for
simplex and duplex cables for use in terminated cable assemblies
3
Description
The parent connector for the type LF3 connector family is a simplex connector which is
characterized by a 1,25 mm nominal ferrule diameter. It includes a push-click-pull coupling
mechanism, which is spring-loaded relative to the ferrule in the direction of the optical axis.
The optical alignment mechanism of the connectors is a rigid bore sleeve or a resilient sleeve
style.
Drawings and dimensions provided consist of those minimum features that are functionally
critical during the mating and unmating sequences of the plug with its adapter/receptacle
counterpart component.
4
Interfaces
The pages that follow define the standard interfaces for the type LF3 connector family.
This standard contains the following standard interfaces:
61754-28-1
Simplex plug connector PC-interface
61754-28-2
Simplex adaptor interface
61754-28-3
Simplex active device receptacle interface
61754-28-4
Duplex plug connector PC-interface
61754-28-5
Duplex adaptor interface
61754-28-6
Duplex active device receptacle interface
61754-28-7
Simplex plug connector interface – APC 8°
61754-28-8
Duplex plug connector interface – APC 8°
The standards in Table 1 are intermateable.
BS EN 61754-28:2012
61754-28 IEC:2012
–7–
Table 1 – Intermateability between plugs, adaptors
and active device within the IEC 61754-28 family
Plugs
Adaptors
Active device
61754-28-2
61754-28-5
61754-28-3
61754-6
61754-28-1
Mate
Mate
Mate
Mate
61754-28-4
Not mate
Mate
Not mate
Mate
61754-28-7
Mate
Mate
Mate
Mate
61754-28-8
Not mate
Mate
Not mate
Mate
BS EN 61754-28:2012
61754-28 IEC:2012
–8–
Figure 1 gives an example of a simplex plug interface.
B
Q
Optical reference plane
Mechanical reference plane
D
C
b
O
0,05 A
0,05 A
Section b-b
H1
J
I
M
Z
U
F
b
Y
N
V
0,025 A
G
A
H2
AF
AQ
Mechanical reference plane
AR
AP
Protection cap
AO
Plane A
Body
EB
EA
Plane B
Top view with protection cap opened (APC type)
Ferrule
IEC 719/12
Figure 1 – Simplex plug interface
BS EN 61754-28:2012
61754-28 IEC:2012
–9–
Figure 2 gives an example of endface geometry.
A
A
BG
BG
No sharp edge
BH
BH
No sharp edge
BI
BI
IEC 720/12
Figure 2 – APC/PC endface geometry
Figure 3 gives an example of the duplex plug interface.
C
∅0,2 C
K
IEC 721/12
Figure 3 – Duplex plug interface
BS EN 61754-28:2012
61754-28 IEC:2012
– 10 –
Table 2 gives dimensions of the plug connector interface.
Table 2 – Dimensions of plug connector interface (1 of 2)
Reference
Dimensions
Remarks
mm
Minimum
A
Basic
Maximum
–
–
10,3
10,6
C
4,2
4,45
D
3,2
3,35
F
0,3
0,5
Radius
G
4,88
5,10
Ferrule extension
H1
4,42
4,52
H2
4,42
4,52
I
3,0
3,2
J
H/2
H/2
a
B
K
Diameter, Grade, see Table 2b
Diameter
6,25
M
-
1,0
N
-
0,5
O
1,1
-
Q
8,6
8,9
U
5,0
5,1
V
12,1
-
Y
3,3
-
Z
5,6
7,5
Dependent on version, with or without
protection cap
AO
3,35
3,4
Height protection cap
AP
6,7
6,9
Length protection cap
AQ
2,5
2,63
AR
4,45
4,48
AF
17
Degrees
BG
b
0,6
-
BH
b
-
1,0
b, c
5
-
BI
EA
d
EB
Width protection cap
Pedestal diameter
Radius
90
Degrees
8
Degrees
BS EN 61754-28:2012
61754-28 IEC:2012
– 11 –
Table 2 (2 of 2)
a
Dimension B is given for a plug endface when not mated. The ferrule is movable by a certain axial compression
force, with direct contacting endface, and therefore dimension B is variable. Ferrule compression force shall be
5,0 N to 6,0 N when the position of the optical datum target, dimension B is moved to the range 9,8 mm to 10,0
mm. Forces are for buffered fibre only; different cord constructions can result in higher forces (see IEC 607942-50).
b
These dimensional requirements apply to the finished ferrule, after all polishing procedures have been
completed.
c
Dimension BI is the radius of the polished ferrule end face
d
Dimension EA is defined as an angle between two planes: One plane, plane A, passes through the axis of the
ferrule and the axis of symmetry of the key of the angled end face connector plug. The other plane, plane B,
passes through the axis of the ferrule and the plane normal to the angled PC reference plane.
Table 3 gives a ferrule grade table for plug connector interfaces.
Table 3 – Ferrule grade table for plug connector interfaces
Grade
ØA
mm
Minimum
Maximum
0
1,2490
1,2495
1
1,2485
1,2495
2
1,2483
1,2495
BS EN 61754-28:2012
61754-28 IEC:2012
– 12 –
Figures 4 and 5 give examples of simplex and duplex adaptor interfaces.
AP
AO
AQ
A
Section a-a
a
M
F
a
C
H2
b
Section b-b
C
D
B
O
Mechanical
reference plane
P
Optical reference
plane
AT
E
AR
∅0,05 B
I
A
AW
Z
AV
∅0,025 B
AS
0,05 C
N
J
0,05 C
H1
Optical reference
plane
B
G
b
Shown without laser
protection shutter
AX
Laser protection
shutter (not dimensioned)
∅0,05 C
∅0,025 A
IEC 722/12
Figure 4 – Simplex adaptor interface
B
∅0,1 B
K
IEC 723/12
Figure 5 – Duplex adaptor interface
BS EN 61754-28:2012
61754-28 IEC:2012
– 13 –
Table 4 gives dimensions of the simplex and duplex adaptor interface.
Table 4 – Dimensions of the simplex and duplex adaptor interface
Reference
Dimensions
Remarks
mm
Minimum
A
a
Maximum
–
–
Diameter
B
9,9
10
Diameter
C
4,5
-
D
3,4
3,5
E
2,6
2,7
F
0,2
0,3
G
4,0
4,1
H1
4,65
4,75
H2
4,65
4,75
I
2,87
2,97
J
2,29
K
6,25
M
1,0
1,1
N
0,5
0,6
O
-
1,3
P
a
Basic
15
Radius
Diameter
Degrees, typical
Z
7,6
7,9
AO
11,0
12,8
AP
14,5
14,7
AQ
2,2
2,4
AR
1,1
1,2
AS
6,6
6,8
AT
0,6
0,7
AV
1,0
1,1
AW
1,4
1,5
AX
1,9
-
Radius
Diameter
The connector alignment feature is a resilient (split) alignment sleeve. The feature must accept a pin gauge to
the centre of the adaptor with a force of 1,0 N to 2,5 N under the condition that another pin gauge is inserted into
the feature from the other side until both pin gauges butt against each other. The pin gauge shall be according to
Figure 6. The centre of the adaptor is defined by the left side position of dimension B
BS EN 61754-28:2012
61754-28 IEC:2012
– 14 –
Figure 6 gives an example of a pin gauge for an adaptor.
∅CK
CN
Chamfer or radius
IEC 724/12
NOTE 1
Surface roughness R Z = 0,2 µm.
Figure 6 – Pin gauge for adaptor
Table 5 gives gauge pin dimensions.
Table 5 – Gauge pin dimensions
Pin gauge
grade
1,249
a
CK diameter
CN
mm
mm
Remarks
Minimum
Maximum
Minimum
Maximum
1,2488
1,2492
4,2
15
Surface roughness should be <0,2 µm Ra; cylindricity is less than 0,5 µm.
Resilient sleeve
a
BS EN 61754-28:2012
61754-28 IEC:2012
– 15 –
Figures 7 and 8 give examples of simplex and duplex active device receptacle interfaces.
AP
AO
AQ
A
Section a-a
a
M
F
a
Optical reference
plane
D
E
Mechanical
reference plane
O
Z
A
I
B
AW
AS
∅0,05 B
AV
P
AR
AT
B
J
0,05 C
H2
Section b-b
C
0,05 C
N
C
b
H1
Optical reference
plane
∅0,05 B
b
AX
G
∅0,05 C
∅0,025 A
IEC 725/12
Figure 7 – Simplex active device receptacle interface
B
∅0,1 B
K
IEC 726/12
Figure 8 – Duplex active device receptacle interface
BS EN 61754-28:2012
61754-28 IEC:2012
– 16 –
Table 6 gives dimensions of active device interface.
Table 6 – Dimensions of active device interface
Reference
Dimensions
Remarks
mm
Minimum
Basic
Maximum
A
–
–
B
9,9
C
4,5
-
D
3,4
3,5
E
2,6
2,7
F
0,2
0,3
G
4,0
4,1
H1
4,65
4,75
H2
4,65
4,75
I
2,87
2,97
10,0
J
2,29
K
6,25
a, b
10,0
M
1,0
1,1
N
0,5
0,6
O
-
1,3
P
Grade, Table 4b
15
Radius
Diameter
Degrees, typical
Z
7,6
7,9
AO
11,0
12,8
AP
14,5
14,7
AQ
2,2
2,4
AR
1,1
1,2
AS
6,6
6,8
AT
0,6
0,7
AV
1,0
1,1
AW
0,5
0,6
AX
1,9
-
Radius
a
The connector alignment feature is a rigid sleeve or a resilient alignment sleeve. Dimension A defines the inner
diameter of the alignment feature.
b
The sleeve may be fixed or floating. For a fixed sleeve, the positional tolerance applies. For a floating sleeve, a
gauge pin inserted in the sleeve must be capable of moving freely into a position such that it is coincident with
datum B.
BS EN 61754-28:2012
61754-28 IEC:2012
– 17 –
Table 7 gives the grade table.
Table 7 – Grade table
Grade
Reference A
Remarks
mm
Minimum
Maximum
1
1,251
1,252
2
1,251
1,254
3
1,251
1,257
4
Rigid bore sleeve
a, c
Resilient alignment sleeve
b, c
a
The connector alignment feature is a rigid bore sleeve. The dimension A shall be tested
using two pin gauges. One pin gauge has the pin gauge grade number 1 µm larger than
the maximum value of dimension A, the other pin gauge has the number 1 µm smaller
than the minimum value of dimension A. The appropriate pin gauge shall be selected
from the pin gauge grade table.
b
The connector alignment feature is a resilient (split) alignment sleeve. The feature must
accept a pin gauge completely to the left side of dimension G with a force of 1,0 N to
2,5 N. Insert the pin gauge completely, from only one side, the connector side of the
active device receptacle interface. The pin gauge is defined in Figure 6.
c
Add grade number to the interface reference number.
BS EN 61754-28:2012
61754-28 IEC:2012
– 18 –
Annex A
(informative)
Panel cutout
FA
CA
FC
D
CC
D
CB
FB
IEC 991/09
Figure A.1 – Simplex and duplex adaptor cutout
Table A.1 – Dimensions of the simplex and duplex adaptor cutout
Reference
Dimensions
Minimum
a
Basic
Remarks
Maximum
CA
11,7 mm
11,8 mm
CB
7,1 mm
7,2 mm
CC
15.9 mm
16,1 mm
FA
13,2 mm
13,4 mm
FB
13,5 mm
13,7 mm
FC
17,4 mm
17,6 mm
D
2,2 mm
2,4 mm
May not be necessary for all versions.
NOTE
Panel thickness should be between 1,2 and 1,6 mm.
a
a
Diameter
a
BS EN 61754-28:2012
61754-28 IEC:2012
– 19 –
Bibliography
ISO 8015, Geometrical product specifications (GPS) – Fundamentals – Concepts, principles
and rules
___________
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