DIN EN 50090-5-2-2021 家用和建筑物用电子系统(HBES). 第5-2部分: 介质和介质相关层. 基于HBES1类的双扭线网络; 英文版本EN 50090-5-2-2020
Home and Building Electronic Systems (HBES) - Part 5-2: Media and media dependent layers - Network based on HBES Class 1, Twisted Pair; English version EN 50090-5-2:2020
This document defines the mandatory and optional requirements for the medium specific physical and data link layer for HBES Class 1 Twisted Pair TP1. Data link layer interface and general definitions, which are media independent, are given in EN 50090-4-2.