低压开关设备和控制设备.控制器-器件的接口(CDIs).第3部分:器件网络

[中文适用范围]： 本部分IEC 62026规定了单个或多个控制器与控制电路设备或开关元件之间的接口系统。该接口系统使用一根电缆中的两对导体——其中一对提供差分通信介质，另一对为设备供电。本部分确立了具有此类接口的组件的互操作性要求。 本部分IEC 62026规定了DeviceNet的以下特殊要求： - 控制器与开关元件之间接口的要求； - 设备的正常使用条件； - 结构和性能要求； - 验证符合要求的测试。 这些特殊要求是对IEC 62026-1通用要求的补充。 [外文原描述]： IEC 62026-3:2014 specifies an interface system between single or multiple controllers, and control circuit devices or switching elements. The interface system uses two conductor pairs within one cable - one of these pairs provides a differential communication medium and the other pair provides power to the devices. This part establishes requirements for the interoperability of components with such interfaces. This third edition of IEC 62026-3 cancels and replaces the second edition published in 2008. This third edition constitutes a technical revision. The main changes with respect to the previous edition are the followings: - specification of group 4 messages (5.1.2); - clarifications on messaging protocol (5.2); - addition of I/O multicast poll messages (5.5.2 and 5.5.8); - clarifications on slave behaviour (5.5.4 and 5.5.9); - clarifications on physical layer (transceiver) in 5.7; - miscellaneous corrections/clarifications on cable (8.2); - clarifications on EMC testing (9.2.10) and logical testing (9.3). The contents of the corrigendum of March 2015 and corrigendum of October 2019 have been included in this copy.