IEC 60512-99-003:2023用于评估SC 48B范围内的连接器，这些连接器用于具有远程电源的平衡单对通信布线，以支持例如点对点连接的IEEE 802.3远程供电应用。 本文件的目的是详细说明测试时间表，以确定IEC 63171系列中定义的单对连接器组在电气负载下承受至少100次机械操作的能力，其中在分离（解除配合）步骤期间，电流根据IEC 60512-9-3通过连接器。 本文档不涵盖单对连接器的多点供电应用。

IEC 60512-99-003:2023 is used for the assessment of connectors within the scope of SC 48B that are used in balanced single-pair communication cabling with remote power, in support of e.g., IEEE 802.3 remote powering applications for point-to-point connections.
The object of this document is to detail a test schedule to determine the ability of sets of single-pair connectors as defined in the IEC 63171 series to withstand a minimum of 100 mechanical operations with electrical load, where an electrical current is being passed through the connector in accordance with IEC 60512-9-3 during the separation (unmating) step.
This document does not cover multidrop powering applications of single-pair connectors.