爆炸性环境第47部分:2线本质安全以太网概念的设备保护

[中文适用范围]： IEC 60079-0的本文部分是一项技术规范，规定了用于2线本质安全以太网概念（2-WISE）的设备、系统和安装的安装、标记和文件编写要求，例如IEEE 802.3cg定义的10BASE-T1L的2线以太网物理层规范。 2-WISE是一种先进物理层（APL）的概念，旨在通过根据特定危险区域要求定义APL端口的通用本质安全参数限值，并列出设置段的简明规则，从而简化APL段内组件和电缆本质安全参数的检查过程。 2-WISE设备和系统的安装要求包括在IEC 60079-11、IEC 60079-14和IEC 60079-25中，但本文件另有修改的除外。2-WISE设备的部件可以根据本意危险区域的EPL，采用IEC 60079-0中列出的任何保护类型进行保护。在这些情况下，本技术规格的要求仅适用于设备的本质安全电路。 如果本文件的要求与IEC 60079-0、IEC 60079-11、IEC 60079-14或IEC 60079-25的要求冲突，则本文件的要求优先。 [外文原描述]： IEC 60079-47:2021(E), which is a technical specification, specifies requirements for the construction, marking and documenting of apparatus, systems and installations for use with the 2-Wire Intrinsically Safe Ethernet concept (2-WISE), such as the physical layer specification for 2-Wire Ethernet 10BASE-T1L as defined in IEEE 802.3cg. 2-WISE is a concept for an advanced physical layer (APL), designed to simplify the examination process for intrinsic safety parameters of components and cabling within APL segments. This is achieved by defining universal intrinsic safety parameter limits for APL ports, according to the specific hazardous area requirements and listing a concise set of rules for the segment setup. The requirements for construction and installation of 2-WISE devices and systems are included in IEC 60079-11, IEC 60079-14, and IEC 60079-25, except as modified by this document. Parts of a 2-WISE device can be protected by any Type of Protection listed in IEC 60079-0 appropriate to the EPL for the intended hazardous area. In these circumstances, the requirements of this technical specification apply only to intrinsically safe circuits of the apparatus. Where a requirement of this document conflicts with a requirement of IEC 60079-0, IEC 60079 11, IEC 60079-14 or IEC 60079-25, the requirements of this document take precedence.