IEC 60825-12:2022

IEC 60825-12 ®
Edition 3.0 2022-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of laser products –
Part 12: Safety of free space optical communication systems used for
transmission of information
Sécurité des appareils à laser –
Partie 12: Sécurité des systèmes de communication optique en espace libre
utilisés pour la transmission d’informations

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IEC 60825-12 ®
Edition 3.0 2022-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of laser products –
Part 12: Safety of free space optical communication systems used for

transmission of information
Sécurité des appareils à laser –

Partie 12: Sécurité des systèmes de communication optique en espace libre

utilisés pour la transmission d’informations

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.260 ISBN 978-2-8322-6195-8

– 2 – IEC 60825-12:2022 © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Assessment of access level . 12
4.1 General . 12
4.2 Determination of access level and the use of Condition 2. 13
4.3 Access level 1 and 1M . 14
4.4 Access level 2 and 2M . 15
4.5 Access level 3R . 16
4.6 Access level 3B . 16
4.7 Access level 4 . 16
4.8 Time base . 17
5 Classification and evaluation of access level . 17
5.1 General . 17
5.2 Impact of using automatic power reduction features . 18
5.3 Automatic power reduction mechanisms (APR) . 18
5.3.1 General . 18
5.3.2 APR performance requirements . 18
5.4 Installation protection systems (IPS) . 19
6 Access level and classification requirements by location type . 19
6.1 General . 19
6.2 Requirements for unrestricted locations . 22
6.2.1 General . 22
6.2.2 Use of access level 1M and access level 2M FSOCS equipment in
unrestricted locations. 24
6.2.3 Use of access level 3R FSOCS equipment in unrestricted locations . 26
6.2.4 General . 26
6.2.5 Use of access level 3R FSOCS equipment in restricted locations . 27
6.3 Requirements for controlled locations . 28
6.3.1 General . 28
6.3.2 Use of access level 3B and access level 4 FSOCS equipment in
controlled locations . 29
6.4 Requirements for inaccessible space . 29
6.5 Specular reflections . 29
7 Organizational requirements . 30
7.1 Requirements for manufacturers of ready-to-use FSOCS transmitter or turn
key systems . 30
7.1.1 General . 30
7.1.2 Additional manufacturer's requirements . 31
7.2 Installation and service organization requirements . 32
7.3 Operating organization requirements . 33
8 Marking . 33
8.1 General . 33
8.2 Marking of aperture for transmitter . 35
8.3 Durability – Indelibility requirements for safety markings . 35

8.4 Warning for invisible radiation . 35
Annex A (informative) Rationale . 36
Annex B (informative) Clarification of the meaning of "access level" . 37
B.1 General . 37
B.2 Class . 37
B.3 Access level . 37
Annex C (informative) Examples of applications and calculations. 38
C.1 Symbols used in the example of this annex . 38
C.2 Examples of NHZ and ENHZ . 38
C.2.1 General . 38
C.2.2 Example − Collimated beam access level 1M FSOCS . 38
C.2.3 Example − Diverging beam access level 1M FSOCS . 39
C.2.4 Example – Access level 3B FSOCS product . 39
C.3 Viewing a specular (mirror-like) reflection . 40
C.4 Example of divergent, diffuse IR transmitter . 41
C.5 FSOCS link between two restricted locations . 42
C.6 Unmanned (uncrewed) Aerial (aircraft) system (UAS) . 45
Annex D (informative) Methods of hazard/safety analysis . 48
Annex E (informative) Guidance for installing, servicing and operating organizations . 49
E.1 Working practices for FSOCSs . 49
E.1.1 General . 49
E.1.2 General working practices . 49
E.1.3 Additional working practices for Class/access level 1M, 2M, 3R, 3B and
4 systems . 50
E.2 Education and training . 50
Bibliography . 51

Figure 1 – Commercial structures . 20
Figure 2 – Residential areas .
...