标准摘要
[中文适用范围]： 本国际标准涵盖了完整的物理层（OSI 第1层），包括与媒体访问控制（MAC）子层的接口和与介质的接口。还规定了由其他层控制但控制物理层操作的参数。 [外文原描述]： ISO/IEC 14908-2:2011 specifies the control network protocol (CNP) free-topology twisted-pair channel for networked control systems in local area control networks and is used in conjunction with ISO/IEC 14908-1. The channel supports communication at 78,125 kbit/s between multiple nodes, each of which consists of a transceiver, a protocol processor, an application processor, a power supply and application electronics. ISO/IEC 14908-2:2011 covers the complete physical layer (OSI Layer 1), including the interface to the Media Access Control (MAC) sublayer and the interface to the medium. Parameters that are controlled by other layers but control the operation of the physical layer are also specified.
英文名称Information technology - Control network protocol - Part 2: Twisted pair communication