IEC 60825-2:2000
(Main)Safety of laser products - Part 2: Safety of optical fibre communication systems
Safety of laser products - Part 2: Safety of optical fibre communication systems
Provides requirements and specific guidance for the safe use of optical fibre and/or control communication systems where optical power may be accessible at great distance from the optical source. The objective of this part 2 of IEC 60825 is to: - protect people from optical radiation resulting from optical fibre communication systems. This requires the introduction of engineering requirements and work practices according to the degree of hazard; - lay down requirements for manufacturers and operating organizations in order to establish procedures and supply information so that proper precautions can be adopted; - ensure adequate warning to individuals of the hazards associated with optical fibre communication systems through signs, labels and instructions; - reduce the possibility of injury by minimizing unnecessary accessible radiation, give improved control of the optical radiation through protective features and provide safe usage of products by specifying user control measures. The contents of the interpretation sheet of August 2001 have been included in this copy.
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TC 76 /IEC 60825-2
(Second edition – 2000)
IS 01
Safety of laser products
Part 2: Safety of optical fibre communication systems
INTERPRETATION SHEET 1
General instruction for all normative clauses, including annex B:
Replace “Hazard Level 2 “ with “Hazard level 2 or Hazard level 2M, as appropriate”.
Replace “Hazard Level 3A” with “Hazard Level 1M or Hazard Level 3R, as appropriate”.
In Annex B, 3B Hazard Level, controlled location column, replace “Hazard Level kx3A” with
“Hazard Level 1M or 2M.”
Delete all remaining references to “Hazard Level kx3A”.
All classification and hazard level evaluations shall be made in accordance with IEC 60825-1,
Amendment 2.
Page 11
4.4.2
In table 1, the limiting aperture values for IEC 60825-1, Amendment 2 shall be substituted.
Page 14
Annexes
Delete all informative annexes.
Replace old annex B by the following new annex A:
Annex A
(normative)
Summary of engineering requirements at locations in
optical fibre communicati
...
INTERNATIONAL IEC
STANDARD
60825-2
Second edition
2000-05
Safety of laser products –
Part 2:
Safety of optical fibre communication systems
Sécurité des appareils à laser –
Partie 2:
Sécurité des systèmes de télécommunication
par fibres optiques
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are
available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base
publication incorporating amendments 1 and 2.
Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is to be found at the following IEC sources:
• IEC web site*
•
Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.
INTERNATIONAL IEC
STANDARD
60825-2
Second edition
2000-05
Safety of laser products –
Part 2:
Safety of optical fibre communication systems
Sécurité des appareils à laser –
Partie 2:
Sécurité des systèmes de télécommunication
par fibres optiques
IEC 2000 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
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International Electrotechnical Commission
For price, see current catalogue
TC 76 /IEC 60825-2
(Second edition – 2000)
IS 01
Safety of laser products
Part 2: Safety of optical fibre communication systems
INTERPRETATION SHEET 1
General instruction for all normative clauses, including annex B:
Replace “Hazard Level 2 “ with “Hazard level 2 or Hazard level 2M, as appropriate”.
Replace “Hazard Level 3A” with “Hazard Level 1M or Hazard Level 3R, as appropriate”.
In Annex B, 3B Hazard Level, controlled location column, replace “Hazard Level kx3A” with
“Hazard Level 1M or 2M.”
Delete all remaining references to “Hazard Level kx3A”.
All classification and hazard level evaluations shall be made in accordance with IEC 60825-1,
Amendment 2.
Page 11
4.4.2
In table 1, the limiting aperture values for IEC 60825-1, Amendment 2 shall be substituted.
Page 14
Annexes
Delete all informative annexes.
Replace old annex B by the following new annex A:
Annex A
(normative)
Summary of engineering requirements at locations in
optical fibre communication system
Hazard level Location type
Unrestricted Restricted Controlled
1 No requirements No requirements No requirements
1M 1) Labelling, and Labelling Labelling
2) Class 1* from
connector or connector
requires tool
2 and 2M 1) Labelling, and Labelling Labelling
2) Class 1* from
connector, or connector
requires tool
3R Not permitted ** 1) Labelling, and 1) Labelling, and
2) Class 1M* from 2) class 1M or 2M* from
connector, or connector or connector
connector requires requires tool
tool
3B Not permitted ** Not permitted** 1) Labelling,
and
2) Protected cables,
and
3) class 1M or 2M* from
connector or connector
requires tool
4 Not permitted ** Not permitted ** Not permitted**
* To be achieved by mechanical design of connector, automatic power reduction or other suitable
means.
** See 4.4.3. Where systems employ power levels of class 3R or more, protection systems such as
APR may be used to obtain the acceptable hazard level for the particular location type.
August 2001
– 2 – 60825-2 IEC:2000(E)
CONTENTS
Page
FOREWORD . 3
Clause
1 Scope . 5
2 Normative references. 5
3 Definitions. 6
4 Manufacturing requirements. 8
4.1 Engineering specifications . 8
4.2 Labelling. 9
4.3 Provision of information . 10
4.4 Assessment of hazard level . 10
4.5 Requirements for installation . 11
4.6 Requirements for restart pulses . 12
5 Guidance for service and maintenance . 12
5.1 Tests and measurements. 12
5.2 Safety precautions . 12
Annex A (informative) Rationale . 14
Annex B (normative) Summary of engineering requirements at locations in optical fibre
communication system . 15
Annex C (informative) Methods of hazard/safety analysis. 16
Annex D (informative) Application notes for the safe use
of optical fibre communication systems . 17
Annex E (informative) Clarification of the meaning of “laser hazard level”. 35
Bibliography . 37
Figure D.1 – PON (passive optical network)-based system. 34
Table 1 – Assessment of hazard level during shutdown time for systems employing
automatic power reduction (see 4.4.2). 11
Table D.1 – Optical fibre system power limits for 11 microns singlemode
and 0,18 numerical aperture multimode fibres . 30
Table D.2 – Automatic power reduction – Immediately accessible situations . 31
Table D.3 – Controlled access example scenarios. 32
Table D.4 – Restricted access example scenarios . 32
Table D.5 – Unrestricted access example scenarios. 33
Table D.6 – Examples of power limits for optical fibre communication systems
having automatic power reduction to reduce emissions to a lower hazard level . 34
©
60825-2 IEC:2000(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
SAFETY OF LASER PRODUCTS –
Part 2: Safety of optical fibre communication systems
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60825-2 has been prepared by IEC technical committee 76:
Optical radiation safety and laser equipment.
This second edition cancels and replaces the first edition published in 1993 and amendment 1
(1997). This second edition constitutes a technical revision.
The text of this standard is based on the first edition, amendment 1 and the following
documents:
FDIS Report on voting
76/208/FDIS 76/211/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
IEC 60825-2 constitutes part 2 of a series of publications under the general title: Safety of
laser products.
Annex B forms an integral part of this standard.
Annexes A, C, D and E are for information only.
– 4 – 60825-2 IEC:2000(E)
The committee has decided that the contents of this publication will remain unchanged until
2003. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this standard may be issued at a later date.
©
60825-2 IEC:2000(E) – 5 –
SAFETY OF LASER PRODUCTS –
Part 2: Safety of optical fibre communication systems
1 Scope
This part 2 of IEC 60825 provides requirements and specific guidance for the safe use of
optical fibre and/or control communication systems where optical power may be accessible at
great distance from the optical source. It does not apply to optical fibre systems primarily
designed to transmit optical power for applications such as material processing or medical
treatment.
Throughout this part of IEC 60825, light emitting diodes (LEDs) are included whenever the
word "laser" is used.
The objective of this part 2 of IEC 60825 is to:
– protect people from optical radiation resulting from optical fibre communication systems.
This requires the introduction of engineering requirements and work practices according to
the degree of hazard;
– lay down requirements for manufacturers and operating organizations in order to establish
procedures and supply information so that proper precautions can be adopted;
– ensure adequate warning to individuals of the hazards associated with optical fibre
communication systems through signs, labels and instructions;
– reduce the possibility of injury by minimizing unnecessary accessible radiation, give
improved control of the optical radiation through protective features and provide safe
usage of products by specifying user control measures.
Annex A gives a more detailed rationale for this part of IEC 60825.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60825. For dated references, subsequent amend-
ments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this part of IEC 60825 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60794-2:1989, Optical fibre cables – Part 2: Product specifications
IEC 60825-1:1993, Safety of laser products – Part 1: Equipment classification, requirements
and user's guide
– 6 – 60825-2 IEC:2000(E)
3 Definitions
For the purp
...
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