CSA C22.2 No. 60079-47:22

1 Scope This part of IEC 60079, 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. The requirements of the IEC 60079 series of Standards cover protection with respect to explosion hazard only. The CSA C22.2 No. 60079 series of Standards (based on the adoption of corresponding IEC Standards) may be used in conjunction with other applicable Standards containing the appropriate electrical safety requirements for general use equipment. Requirements for electrical installations of these systems are found in CSA C22.1, Canadian Electrical Code, Part I. General requirements for electrical products are provided in CSA C22.2 No. 0.