IEC TR 63323:2024

IEC TR 63323 ®
Edition 1.0 2024-06
TECHNICAL
REPORT
colour
inside
Fibre optic interconnecting devices and passive components – Study of an SC
connector adaptor with safety lock mechanism
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IEC TR 63323 ®
Edition 1.0 2024-06
TECHNICAL
REPORT
colour
inside
Fibre optic interconnecting devices and passive components – Study of an SC
connector adaptor with safety lock mechanism
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-8961-7
– 2 – IEC TR 63323:2024 © IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 6
5 Interface . 8
6 Intermateability . 9
Annex A (informative) Example of safety lock adaptor and use . 10
Annex B (informative) Delatching condition calculation . 12
Bibliography . 18

Figure 1 – Simplex SC adaptor connector interface with safety lock mechanism . 8
Figure 2 – An example of simplex adaptor with safety lock mechanism . 9
Figure A.1 – Simplex adaptor . 10
Figure A.2 – Simplex adaptor with specific safety dust cap . 10
Figure A.3 – Simplex adaptor connected to the plug connector . 10
Figure A.4 – Four simplex adaptors stacked in a termination box . 11
Figure A.5 – Disconnection of simplex adaptor stacked in a termination box . 11
Figure B.1 – Delatching sequence . 13
Figure B.2 – Example of a worst-case calculation . 16

Table 1 – Dimensions of the simplex adaptor connector interface and relevant
dimensions of the safety lock mechanism . 9
Table B.1 – Dimensions of the simplex PC plug connector interface . 15
Table B.2 – Dimensions of the simplex adaptor connector interface . 16

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – STUDY OF AN SC CONNECTOR ADAPTOR
WITH SAFETY LOCK MECHANISM
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
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IEC TR 63323 has been prepared by subcommittee 86B: Fibre optic interconnecting devices
and passive components, of IEC technical committee TC 86: Fibre optics. It is a Technical
Report.
The text of this Technical Report is based on the following documents:
Draft Report on voting
86B/4883/DTR 86B/4922/RVDTR
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Report is English.

– 4 – IEC TR 63323:2024 © IEC 2024
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INTRODUCTION
Since the very beginning of fibre optic communication technologies, the use of optical
connectors has been restricted to technical and professional environments by expert crews for
installation, operation, and maintenance.
With the diffusion of fibre optic communication technologies in non-professional and consumer
markets, the use of fibre optic communication systems has broadened to users unaware of their
correct handling, particularly for the most accessible items: connector cords.
For standard SC connectors, unintentional disconnection is prevented if the pulling force
applied to the plug connector is lower than 40 N. Beyond this force, a disconnection occurs,
and inconveniences can arise: system optical performance can be impaired; dust can corrupt
the ferrules; and radiation that can be harmful to the eye.
A shuttered adaptor is a means to avoid injury to the eyes by laser light and provides protection
from dust when the plug is disconnected, but it does not protect the disconnected connector.
This document deals with a proposal that aims to solve this problem with a slight modification
of the SC connector adaptor, by introducing a latching mechanism.
Once the latching mechanisms has been unlocked by means of a tool, the disconnection
strength is the same as a standard plug connector.
When the latching mechanisms is locked, it withstands the force applied by a typical handling
force, i.e. <150 N.
– 6 – IEC TR 63323:2024 © IEC 2024
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – STUDY OF AN SC CONNECTOR ADAPTOR
WITH SAFETY LOCK MECHANISM
1 Scope
This document deals with a new proposal for an SC adaptor connector which includes a flexible
retaining element on its top surface, compared to the SC standard adaptor.
With this solution, when the SC plug connector is in place, any accidental disconnection is
difficult, as it employs an external tool or a particular unlocking manoeuvre.
This new adaptor is intended primarily for the home network customer optical fibre termination,
but it can be used in every situation where safety issues are important (e.g. main distribution
frames in central offices, cross-connect cabinets, street cabinets, termination boxes).
It consists of a push-latch-pull mating sequence connection with the assistance of a suitable
tool.
This solution assures compatibility with the existing SC interface standard according to
IEC 61754-4.
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 61754-1, Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces – Part 1: General and guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61754-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available
...