BS EN IEC 62439-5:2018适用于基于 ISO/IEC/IEEE 8802-3（IEEE 802.3）以太网技术。IEC 62439系列的这一部分规定了一种基于 复制网络，在终端节点内执行冗余协议，如 与交换机内置的冗余协议相反。快速错误检测由 两个信标节点，每个节点分别做出切换决策。交叉网络 连接功能使单独连接的端节点能够连接到 这两个网络。交叉引用:IEC 60050-191:1990IEEE 802-1D:1998ISO/IEC/IEEE 8802-3:2014ISO/IEC TR 8802-1:2001IEC 62439-1:2010IEEE 802.1QISO/IEC 10164-1EN 62439-1IEC 61158EN 62439-3EN 62439-6EN 61158EN 62439-4EN 62439-2IEC 62439-3:2016ISO/IEC TR 8802-1:2001IEC 62439- 4:2010IEC 62439-2:2016IEC 62439-6:2010取代了BS EN 62439-5:2010，该标准仍然有效。购买本文件时，所有当前可用的修订版均包含在购买本文件中。

BS EN IEC 62439-5:2018 is applicable to high-availability automation networks based on the ISO/IEC/IEEE 8802-3 (IEEE 802.3) Ethernet technology.This part of the IEC 62439 series specifies a redundancy protocol that is based on the duplication of the network, the redundancy protocol being executed within the end nodes, as opposed to a redundancy protocol built in the switches. Fast error detection is provided by two beacon nodes, the switchover decision is taken in every node individually. The crossnetwork connection capability enables singly attached end nodes to be connected on either of the two networks.Cross References:IEC 60050-191:1990IEEE 802-1D:1998ISO/IEC/IEEE 8802-3:2014ISO/IEC TR 8802-1:2001IEC 62439-1:2010IEEE 802.1QISO/IEC 10164-1EN 62439-1IEC 61158EN 62439-3EN 62439-6EN 61158EN 62439-4EN 62439-2IEC 62439-3:2016ISO/IEC TR 8802-1:2001IEC 62439-4:2010IEC 62439-2:2016IEC 62439-6:2010Replaces BS EN 62439-5:2010 which remains currentAll current amendments available at time of purchase are included with the purchase of this document.