Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 35: Type LSHE connector family for harsh environments

IEC 61754-35: 2020 defines the standard connector interface dimensions for LSHE family of connectors with up to four termini. This connector family is targeting deployment under harsh environmental conditions.

Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces de connecteurs fibroniques - Partie 35 : Série de connecteurs de type LSHE pour environnements hostiles

IEC 61754-35:2020 définit les dimensions normalisées des interfaces des connecteurs de la famille de connecteurs LSHE comportant jusqu’à quatre terminaisons. Cette famille de connecteurs est destinée au déploiement dans des conditions environnementales hostiles.

General Information

Status
Published
Publication Date
08-Apr-2020
Current Stage
PPUB - Publication issued
Completion Date
09-Apr-2020
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IEC 61754-35
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 35: Type LSHE connector family for harsh environments
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces
de connecteurs fibroniques –
Partie 35: Famille de connecteurs de type LSHE pour environnements hostiles
IEC 61754-35:2020-04(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61754-35
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 35: Type LSHE connector family for harsh environments
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces
de connecteurs fibroniques –
Partie 35: Famille de connecteurs de type LSHE pour environnements hostiles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-8109-3

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61754-35:2020  IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Description ...................................................................................................................... 6

5 Connector Interfaces ....................................................................................................... 6

5.1 General ................................................................................................................... 6

5.2 Plug connector interface ......................................................................................... 7

5.3 Plug connector interface ......................................................................................... 9

6 Interfaces ...................................................................................................................... 11

7 Ferrule grades ............................................................................................................... 12

8 Ferrule position ............................................................................................................. 12

9 Pin gauge for adaptor .................................................................................................... 13

Annex A (informative) Panel cutout dimensions .................................................................. 15

Bibliography .......................................................................................................................... 16

Figure 1 – Plug connector interface (isometric view) ............................................................... 7

Figure 2 – Plug connector mating dimensions ......................................................................... 8

Figure 3 – Expanded view from direction A (APC type) ........................................................... 8

Figure 4 – Socket connector interface (isometric view) ......................................................... 10

Figure 5 – Socket connector mating dimensions ................................................................... 10

Figure 6 – Expanded view from direction A (APC type) ......................................................... 10

Figure 7 – Insert’s front view (top left) and side view without (top right) and with

(bottom) adaptor ................................................................................................................... 12

Figure 8 – Pin gauge for adaptor ........................................................................................... 14

Figure A.1 – Panel cutout for socket ..................................................................................... 15

Table 1 – Intermateability between plugs and sockets within the IEC 61754-35 family ........... 7

Table 2 – Plug connector dimensions ...................................................................................... 9

Table 3 – Socket connector dimensions ................................................................................ 11

Table 4 – Ferrule grades ....................................................................................................... 12

Table 5 – Ferrule position ..................................................................................................... 13

Table 6 – Insert dimensions .................................................................................................. 13

Table 7 – Pin gauge dimensions ........................................................................................... 14

Table A.1 – Dimensions of the panel cutout .......................................................................... 15

---------------------- Page: 4 ----------------------
IEC 61754-35:2020  IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – FIBRE OPTIC CONNECTOR INTERFACES –
Part 35: Type LSHE connector family for harsh environments
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61754-35 has been prepared by subcommittee 86B: Fibre optic

interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.

The text of this International Standard is based on the following documents:
FDIS Report on voting
86B/4271/FDIS 86B/4285/RVD

Full information on the voting for the approval of this International Standard can be found in the

report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 61754 series, published under the general title Fibre optic

interconnecting devices and passive components – Fibre optic connector interfaces, can be

found on the IEC website.
---------------------- Page: 5 ----------------------
– 4 – IEC 61754-35:2020  IEC 2020

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 61754-35:2020  IEC 2020 – 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 connector

structure given in clause 5.

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 (http://patents.iec.ch) 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.
---------------------- Page: 7 ----------------------
– 6 – IEC 61754-35:2020  IEC 2020
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – FIBRE OPTIC CONNECTOR INTERFACES –
Part 35: Type LSHE connector family for harsh environments
1 Scope

This part of IEC 61754 defines the standard connector interface dimensions for LSHE family of

connectors with up to four termini. This connector family is targeting deployment under harsh

environmental conditions.
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.

IEC 61753-1, Fibre optic interconnecting devices and passive components – Performance

standard – Part 1: General and guidance

IEC 61754-1, Fibre optic interconnecting devices and passive components – Fibre optic

connector interfaces – Part 1: General and guidance

IEC 61755 (all parts), Fibre optic interconnecting devices and passive components – Connector

optical interfaces
3 Terms and definitions
No terms and definitions are listed in this document.
4 Description

The LSHE connector family is intended to be used outdoor, in industrial and, more generally, in

harsh environments. It is therefore designed to survive under harsh conditions, according to

IEC 61753-1. A connection comprises a plug connector and a socket, each one containing an

insert with up to four termini. Each terminus hosts a 2,5 mm (nominal) ferrule, which may be

physical contact (PC) or angled PC (APC) polished. Within a connection, the ferrules are aligned

through resilient sleeves housed in an adaptor that may be fixed either on the plug side or on

the socket side (hermaphrodite connection system). Each terminus may support any type of

fibre (SM, MM or other) provided the termini facing each other in the connection contain

compatible fibres. The same applies to the polishing type (PC or APC) of the mating termini.

Within one connector, different types of fibre and termini may be used. The mechanical

connection between the plug connector and the socket is ensured by a push-pull mechanism.

5 Connector Interfaces
5.1 General
General requirements defined in IEC 61754-1 shall be applied for this document.
---------------------- Page: 8 ----------------------
IEC 61754-35:2020  IEC 2020 – 7 –
This document contains the following standard interfaces:
• interface IEC 61754-35-1: four-way plug connector interface;
• interface IEC 61754-35-2: four-way socket connector interface.
The plugs and sockets shown in Table 1 are intermateable.
Table 1 – Intermateability between plugs and sockets within
the IEC 61754-35 family
Plugs Socket
- 61754-35-2
61754-35-1 mate
5.2 Plug connector interface

The isometric view of the plug connector interface with the protection cap open is shown in

Figure 1. In this example, two of the four termini are equipped with adaptors.
NOTE Two adaptors are displayed, and the protection cap is open.
Figure 1 – Plug connector interface (isometric view)

The side and front views of the plug connector are illustrated in Figure 2 while the orientation

of the APC ferrule with respect to the connector is shown in Figure 3, where the optical

reference plane is defined as the plane passing through the nominal fibre centre and parallel to

the mechanical reference plane. The relevant dimensions are listed in Table 2.
---------------------- Page: 9 ----------------------
– 8 – IEC 61754-35:2020  IEC 2020
Figure 2 – Plug connector mating dimensions
Figure 3 – Expanded view from direction A (APC type)
---------------------- Page: 10 ----------------------
IEC 61754-35:2020  IEC 2020 – 9 –
Table 2 – Plug connector dimensions
Reference Dimensions Notes
Minimum Basic Maximum
A 13,28 mm 13,35 mm Diameter
B 14,20 mm 14,50 mm Diameter
C 21,20 mm 21,60 mm
34,45 mm 34,55 mm
E 9,95 mm 10,15 mm
F 10,95 mm 11,15 mm
G 12,90 mm 13,40 mm
H 9,80 mm 10,20 mm
12,40 mm 12,50 mm
K 7,45 mm 7,55 mm
L 36,40 mm 36,70 mm
M 50,00 mm 50,25 mm
50,5 mm 50,9 mm
P 12,75 mm 13,00 mm
R 17,70 mm 17,80 mm
S 19,9 mm 20,0 mm
20,5 mm 20,8 mm
U 10,8 mm 11,0 mm
V 19,20 mm 19,50 mm
W 6 mm -
3 mm 3,1 mm
Z 24,1 mm -
AA 29,8 mm 30,05 mm
AB 2,82 mm 2,95 mm
AC 7,9 mm 8,7 mm
AD 2,9 mm 3,0 mm
AE 21,5 mm 21,8 mm
AF 0,1 mm 0,6 mm
AG 10,4 mm 10,6 mm
8° Angle in degrees
Material and dimensions compatible with application environment.

Dimension N is given when plug connector is not mated and may change under axial compression forces onto

the spring-loaded insert in a mating configuration.
For APC ferrules only.
5.3 Plug connector interface

A cross section of the socket connector interface is shown in Figure 4 with an example of a

possible configuration of the adaptors mounted on two of the four possible termini. The relevant

dimensions and the relative orientation of the APC ferrules with respect to the socket are shown

in Figure 5 and Figure 6, respectively. The socket’s dimensions are listed in Table 3. For

information about panel cutout dimensions, please see Annex A.
---------------------- Page: 11 ----------------------
– 10 – IEC 61754-35:2020  IEC 2020
Figure 4 – Socket connector interface (isometric view)
Figure 5 – Socket connector mating dimensions
Figure 6 – Expanded view from direction A (APC type)
---------------------- Page: 12 ----------------------
IEC 61754-35:2020  IEC 2020 – 11 –
Table 3 – Socket connector dimensions
Reference Dimensions Notes
Minimum Basic Maximum
A 13,40 mm 13,45 mm Diameter
B 13,95 mm 14,05 mm Diameter
34,65 mm 34,80 mm
E 10,20 mm 10,25 mm
F 11,20 mm 11,25 mm
G 13,6 mm 14,3 mm
H 6,5 mm 7,5 mm
J 12,65 mm 12,75 mm
K 7,8 mm 8,2 mm
L 35,8 mm 36,2 mm
M 50,35 mm 50,60 mm
N 49,1 mm 49,5 mm
P 13,15 mm 13,30 mm
R 17,85 mm 17,95 mm
S 20,05 mm 20,25 mm
20,90 mm 21,15 mm
U 11,05 mm 11,20 mm
V 20,90 mm 21,15 mm
W 2,6 mm 3,2 mm
2,7 mm 2,9 mm
Z 21,0 mm 21,5 mm
AA 30,1 mm 30,3 mm
AB 3,15 mm 3,25 mm
AD 2,8 mm 2,9 mm
AE 22,0 mm 22,5 mm
AF 0,65 mm 0,90 mm
AG 10,8 mm 11,2 mm
8° Angle in degrees
AJ 29,9 mm 30,1 mm
Socket without sealing.
For APC ferrules only.
6 Interfaces

The plugs and sockets of the IEC 61754-35 family shall have ferrules with a spherically polished

end-face to provide an appropriate physical contact (PC) or angled physical contact (APC)

according to IEC 61755 (all parts).
---------------------- Page: 13 ----------------------
– 12 – IEC 61754-35:2020  IEC 2020
7 Ferrule grades

The individual optical interfaces inside both connector plug and socket can accommodate

ferrules of different grades according to Table 4.
Table 4 – Ferrule grades
Grade Minimum Maximum
mm mm
0 2,499 0 2,499 5
1 2,498 5 2,499 5
2 2,498 3 2,499 5
8 Ferrule position

The geometrical positioning of the ferrules inside the inserts mounted in both the connector

plug and the socket interface is shown in Figure 7, while the relevant dimensions are listed in

Table 5 and Table 6, respectively.
Figure 7 – Insert’s front view (top left) and side view
without (top right) and with (bottom) adaptor
---------------------- Page: 14 ----------------------
IEC 61754-35:2020  IEC 2020 – 13 –
Table 5 – Ferrule position
X Y
Contact
mm mm
A –2,70 2,70
B 2,70 2,70
C 2,70 –2,70
D –2,70 –2,70

The ferrule positions reported in Table 5 comply with tolerances given in Figure 7 by the true

position, where reference A and reference B are defined in Figure 2 and Figure 5.

Table 6 – Insert dimensions
Reference Dimensions Notes
Minimum Basic Maximum
BA 6,73 mm 6,77 mm
0,2 mm 0,6 mm
BC 4,19 mm 4,23 mm
See Table 4
BE 6,25 mm 6,40 mm
BG 4,17 mm 4,13 mm
BH 0,2 mm 0,4 mm
BJ 45° 75° Angle in degrees

Dimension BB is given for ferrule endface when not mated and may change under axial compression forces

such as in a mating configuration. Ferrule compression force should be from 7,8 N to 11,8 N when BB is 0.

A chamfer or radius is allowed to a maximum according to IEC 61755-3 (all parts).

The ferrule alignment feature is a resilient sleeve. The feature should accept a pin gauge to the middle point of

the sleeve with a force of 2 N to 5,9 N under the condition that another pin gauge is inserted into the feature

from the other side to the same middle point.
9 Pin gauge for adaptor

Figure 8 shows the pin gauge for the adaptor. Table 7 lists the pin gauge dimensions.

---------------------- Page: 15 ----------------------
– 14 – IEC 61754-35:2020  IEC 2020
Key
a envelope condition in accordance with ISO 8015
b surface roughness R = 0,2 µm
Figure 8 – Pin gauge for adaptor
Table 7 – Pin gauge dimensions
References Dimensions Notes
Minimum Basic Maximum
DA 2,499 3 mm 2,499 5 mm
DB 12,5 mm 13,5 mm
DC 1 mm 1,5 mm
DD 28° 32° Angle measured in
degrees
---------------------- Page: 16 ----------------------
IEC 61754-35:2020  IEC 2020 – 15 –
Annex A
(informative)
Panel cutout dimensions

The panel cutout is shown in Figure A.1 while the relevant dimensions are listed in Table A.1.

Figure A.1 – Panel cutout for socket
Table A.1 – Dimensions of the panel cutout
Dimensions
Reference mm Notes
Minimum Basic Maximum
CA 29,8 30,2
CB 22,0 22,2
CC 3,3 3,5
---------------------- Page: 17 ----------------------
– 16 – IEC 61754-35:2020  IEC 2020
Bibliography

ISO 8015, Geometrical product specifications (GPS) – Fundamentals – Concepts, principles

and rules
_____________
---------------------- Page: 18 ----------------------
– 18 – IEC 61754-35:2020  IEC 2020
SOMMAIRE

AVANT-PROPOS .................................................................................................................. 19

INTRODUCTION ................................................................................................................... 21

1 Domaine d’application ................................................................................................... 22

2 Références normatives .................................................................................................. 22

3 Termes et définitions ..................................................................................................... 22

4 Description .................................................................................................................... 22

5 Interfaces de connecteur ............................................................................................... 23

5.1 Généralités ........................................................................................................... 23

5.2 Interface de connecteur mâle ................................................................................ 23

5.3 Interface de connecteur mâle ................................................................................ 26

6 Interfaces ...................................................................................................................... 28

7 Classes de férules ......................................................................................................... 28

8 Position des férules ....................................................................................................... 29

9 Calibre de broche pour raccord...................................................................................... 30

Annexe A (informative) Dimensions de découpe du panneau ............................................... 32

Bibliographie ......................................................................................................................... 33

Figure 1 – Interface de connecteur mâle (vue isométrique) ................................................... 23

Figure 2 – Dimensions d’accouplement des connecteurs mâles ............................................ 24

Figure 3 – Vue agrandie de la direction A (type APC) ........................................................... 24

Figure 4 – Interface de connecteur femelle (vue isométrique) ............................................... 26

Figure 5 – Dimensions d’accouplement des connecteurs femelles ........................................ 26

Figure 6 – Vue agrandie de la direction A (type APC) ........................................................... 27

Figure 7 – Vue avant (en haut à gauche) et vue de côté de l’isolant sans (en haut à

droite) et avec (en bas) raccord ............................................................................................ 29

Figure 8 – Calibre de broche pour raccord ............................................................................ 31

Figure A.1 – Découpe du panneau pour l’embase ................................................

...

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