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]： IEC 62026 的这一部分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。该接口系统在一根电缆内使用两对双绞屏蔽导线 - 其中一对提供差分通信介质，另一对为设备提供电源。本部分规定了具有此类接口的组件的互换性要求。 IEC 62026 的这一部分规定了 DeviceNet 的以下特殊要求： ?控制器和开关元件之间的接口要求； ？设备的正常使用条件； ？结构和性能要求；进行测试以验证是否符合要求。除了 IEC 62026-1 的一般要求外，还适用这些特殊要求。 [外文原描述]： IEC 62026-3:2008 specifies an interface system between single or multiple controllers, and control circuit devices or switching elements. The interface system uses two twisted shielded 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 interchangeability of components with such interfaces. This second edition of IEC 62026-3 cancels and replaces the first edition published in 2000. This second edition constitutes a technical revision. The main changes with respect to the previous edition are listed below: - addition of new services to the base messaging protocol in 5.2; - replacement of detailed application layer requirements in former annexes by references in 5.3 to corresponding specifications in the new edition of IEC 61158 (2007); - addition of requirements for a corresponding safety protocol in 5.6 (by reference to IEC 61784-3); - modified presentation of cable and connector specifications in 8.2 and 8.4, and addition of a new type; - addition of references for safety tests for both EMC and logical tests in 8.10 and 9.3.