IEC 62368的本部分适用于通过通信电缆或端口提供和接收工作电源的设备。它涵盖了设计用于将直流电源从电源设备（PSE）传输到电源设备（PD）的电路的特殊要求。交叉引用:IEC指南104ISO/IEC指南51EN 62368-1:2014EN 62368-1:2014/A11:2017EN 62368-1:2014/AC:2017-03EN 62368-1:2014/AC:2015IEC 62368-1:2014IEC 62949:2017EN 62949:2017取代了BS EN 60950-21:2003，该版本仍然有效。购买本文件时，所有当前可用的修订内容均包含在购买本文件中。

This part of IEC 62368 applies to equipment intended to supply and receive operating power through communication cables or ports. It covers particular requirements for circuits that are designed to transfer DC power from apower sourcing equipment (PSE)to apowered device (PD).Cross References:IEC Guide 104ISO/IEC Guide 51EN 62368-1:2014EN 62368-1:2014/A11:2017EN 62368-1:2014/AC:2017-03EN 62368-1:2014/AC:2015IEC 62368-1:2014IEC 62949:2017EN 62949:2017Replaces BS EN 60950-21:2003 which remains currentAll current amendments available at time of purchase are included with the purchase of this document.