IEC 60825-2:2021

Safety of laser products - Part 2: Safety of optical fibre communication systems (OFCSs)

IEC 60825-2:2021

Name:IEC 60825-2:2021   Standard name:Safety of laser products - Part 2: Safety of optical fibre communication systems (OFCSs)
Standard number:IEC 60825-2:2021   language:English and French language
Release Date:15-Mar-2021   technical committee:TC 76 - Optical radiation safety and laser equipment
Drafting committee:WG 5 - TC 76/WG 5   ICS number:31.260 - Optoelectronics. Laser equipment

IEC 60825-2
Edition 4.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety of laser products –
Part 2: Safety of optical fibre communication systems (OFCSs)

Sécurité des appareils à laser –
Partie 2: Sécurité des systèmes de télécommunications par fibres optiques
(STFO)




your local IEC member National Committee for further information.

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IEC 60825-2
Edition 4.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety of laser products –
Part 2: Safety of optical fibre communication systems (OFCSs)

Sécurité des appareils à laser –

Partie 2: Sécurité des systèmes de télécommunications par fibres optiques

(STFO)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.260; 33.180.01 ISBN 978-2-8322-9366-9

– 2 – IEC 60825-2:2021 © IEC 2021
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Requirements . 12
4.1 General . 12
4.2 Protective housing of OFCS . 12
4.3 Fibre cables . 13
4.4 Cable connectors . 13
4.4.1 General . 13
4.4.2 Unrestricted locations . 13
4.4.3 Restricted locations . 13
4.4.4 Controlled locations . 13
4.5 Labelling and marking . 14
4.5.1 General requirements . 14
4.5.2 Marking of connectors of optical transmitters and optical amplifiers . 17
4.5.3 Markings for groups of connectors . 18
4.5.4 Durability – Indelibility requirements for safety markings . 18
4.5.5 Warning for invisible radiation . 18
4.6 Organizational requirements . 18
4.6.1 Manufacturers of ready-to-use OFCSs or turnkey systems . 18
4.6.2 Installation and service organization . 19
4.6.3 Operating organization . 19
4.7 Assessment of hazard level . 20
4.7.1 Determination of hazard level and the use of Condition 2 . 20
4.7.2 Hazard level assignment of OFCS . 20
4.7.3 Additional requirements applicable to all hazard levels . 22
4.7.4 Requirements for transient accessible exposures when using APR . 23
4.7.5 Conditions for tests and assessment . 23
4.8 Automatic power reduction (APR) . 24
4.8.1 General . 24
4.8.2 Automatic restart . 24
4.8.3 Manual restart with assured continuity . 24
4.8.4 Manual restart without assured continuity . 24
4.8.5 Disabling of the APR . 24
4.9 Hazard level requirements by location type . 25
4.9.1 General . 25
4.9.2 Unrestricted locations . 25
4.9.3 Restricted locations . 25
4.9.4 Controlled locations . 26
Annex A (informative) Rationale . 27
Annex B (informative) Clarification of the meaning of "hazard level". 28
B.1 General . 28
B.2 Class . 28
B.3 Hazard level . 28

B.4 Rationale to 4.7 . 28
B.5 Rationale to Clause D.5 . 29
Annex C (informative) Methods of hazard/safety analysis . 30
Annex D (informative) Application notes for the safe use of OFCS . 31
D.1 Overview. 31
D.2 Areas of application . 31
D.2.1 Typical OFCS installations . 31
D.2.2 Typical system components . 32
D.2.3 Typical operating functions . 33
D.3 OFCS power limits . 33
D.4 Hazard level evaluation examples . 35
D.4.1 Single wavelength over the same fibre . 35
D.4.2 Multiple wavelengths over the same fibre . 41
D.4.3 Bi-directional (full duplex) transmission. 43
D.4.4 Automatic power reduction . 43
D.4.5 Multiple fibres . 45
D.4.6 Ribbon cable . 45
D.4.7 Power diminution due to power splitters and fibre losses . 47
D.4.8 General considerations and examples . 47
D.5 Fault analysis – Explanation and guidance . 48
D.5.1 General . 48
D.5.2 Commonly used fault analysis techniques . 48
D.5.3 Failure modes, effects, and criticality analysis . 48
D.5.4 Consequence analysis . 48
D.6 Suggested working practices . 50
D.6.1 General working practices . 50
D.6.2 Live working practices for hazard levels 1, 1M, 2, 2M and 3R . 51
D.6.3 Working practices for hazard level 3B . 51
D.6.4 Formal power-down and power-up procedure for hazard level 3B . 51
D.7 Maximum output power during shutdown .
...

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