数字通信用多芯和对称对绞/四芯电缆 第14部分：传输特性达20MHz的对称单对电缆 工作区布线 分规范

[中文适用范围]： IEC 61156-14:2025 规定了用于工作区布线的电缆，这些电缆旨在用于在单根扭绞线对上以10 Mb/s的速度传输数据，适用于最大距离为1公里的通道。这些电缆的传输特性在20 MHz频率和20°C温度下进行了规定。根据MICE环境和安装条件，可以使用无屏蔽或有屏蔽的电缆。此外，为了考虑不同的最大传输长度，规定了两组要求。A-1000W型电缆与IEC 61156-13中规定的A-1000型电缆相比，没有衰减降额，且支持最大1公里的通道长度。A-400W型电缆与IEC 61156-13中规定的A-400型电缆相比，存在衰减降额。空白详细规范可在附录A中找到。本文件所涵盖的电缆旨在用于通信系统中通常遇到的电压和电流。虽然这些电缆不打算与低阻抗源（如公共电网的电力供应）一起使用，但它们旨在用于支持直流低压远程供电应用。 [外文原描述]： IEC 61156-14:2025 specifies cables for work area wiring intended to be used for transmission of 10 Mb/s over a single twisted pair in channels for distances of up to 1 km. The transmission characteristics of these cables are specified up to a frequency of 20 MHz and at a temperature of 20°C. Depending on the MICE environment and the installation conditions, either unscreened or screened cables can be used. Furthermore, to consider different maximum transmission lengths, two sets of requirements are specified. The cable type A-1000W does not have attenuation de-rating compared to the A-1000 type according to IEC 61156-13 and is a design supporting up to 1 km channel length. The cable type A-400W has attenuation de-rating compared to the A-400 type according to IEC 61156-13. A blank detail specification can be found in Annex A. The cables covered by this document are intended to operate with voltages and currents normally encountered in communication systems. While these cables are not intended to be used in conjunction with low impedance sources, for example the electric power supplies of public utility mains, they are intended to be used to support the delivery of DC low voltage remote powering applications.