激光产品的安全性. 第2部分: 光纤通信系统(OFCS)的安全性

[中文适用范围]： 本文件提供了光纤通信系统（OFCS）安全操作和维护的要求和具体指南。在这些系统中，光功率可能在发射设备的范围之外和/或距离较远的地方是可访问的。 [外文原描述]： IEC 60825-2:2021 provides requirements and specific guidance for the safe operation and maintenance of optical fibre communication systems (OFCSs). In these systems, optical power is possibly accessible outside the confines of the transmitting equipment and/or at great distance from the optical source. This document requires the assessment of hazard level at each accessible location of the OFCS as a replacement for product classification according to IEC 60825-1. It applies to the installed OFCS as an engineered, end-to-end assembly for the generation, transfer and receipt of optical radiation arising from lasers, light-emitting diodes (LEDs) or optical amplifiers, in which the transference is by means of optical fibre for communication and/or control purposes. Individual components and subassemblies that fall under the definition of a laser product are subject to the applicable subclause(s) of IEC 60825-1. This document is applicable to individual components and subassemblies intended to be installed within OFCSs. This document does not apply to optical fibre systems primarily designed to transmit optical power for applications such as material processing or medical treatment. In addition to the hazards resulting from laser radiation, OFCSs possibly give rise to other hazards, such as fire. This document does not address safety issues associated with explosion or fire with respect to OFCSs deployed in explosive atmospheres. This fourth edition cancels and replaces the third edition published in 2004, Amendment 1:2006 and Amendment 2:2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition. a) Recommendations for individual components and subassemblies have been clarified; see Clause 1, paragraph 3. b) C7 has been revised in accordance with IEC 60825-1:2014, but with an additional limitation related to the skin MPE; see 4.7.2. c) Condition 2 has been changed, and a detailed description of the measurement and determination method for hazard level has been added; see 4.7.1 and 4.7.2. d) Annex B has been moved into 4.9. Annex F has been moved forward as Annex B. e) Clause D.4 Hazard level evaluation examples – Additional examples have been added. f) Clause D.5 Fault analysis – Explanation and guidance has been simplified. The contents of the corrigendum of June 2021 have been included in this copy.