物理层,250K bits/s,屏蔽扭曲的一对物理层

[中文适用范围]： 这些 SAE 推荐做法适用于公路或越野轻型和重型车辆以及使用车辆衍生组件（例如发电机组）的适当固定应用。感兴趣的车辆包括但不限于：公路和非公路卡车及其拖车；建筑设备;以及农业设备和工具。这些文档的目的是为电子系统提供开放式互连系统。这些文档的目的是通过提供标准架构来允许电子设备相互通信。 [外文原描述]： This document defines a physical layer having a robust immunity to EMI and physical properties suitable for harsh environments.CAN controllers are available which support the CAN Flexible Data Rate Frame Format. These controllers, when used on SAE J1939-11 networks, must be restricted to use only the Classical Frame Format compliant to ISO 11898-1:2015.These SAE Recommended Practices are intended for light- and heavy-duty vehicles on- or off-road as well as appropriate stationary applications which use vehicle derived components (e.g., generator sets). Vehicles of interest include but are not limited to: on- and off-highway trucks and their trailers; construction equipment; and agricultural equipment and implements.Cross Reference: AS85485,ISO11898,ISO6722,J1113-13,J1128_201310,J1939-13,J1939_201308