BS EN 50090-5-2 discusses about Media and media dependant layers for Home and Building Electronic Systems (HBES). BS EN 50090-5-2 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.
BS EN 50090-5-2 on the network based on HBES Class 1, Twisted Pair is useful for:
According to OSI, Physical Layers consist of the medium, the cable, the connectors, the transmission technology, etc. which refers to their hardware requirements. In BS EN 50090-5-2 however, the status of the Physical Layer as a “communication medium” is emphasized.
BS EN 50090-5-2 defines the mandatory and optional requirements for the medium specific physical and data link layer for HBES Class 1 Twisted Pair TP1. BS EN 50090-5-2 is intended to be used electronic devices linked via a digital transmission network to provide automated, decentralized, and distributed process control for domestic and commercial and building applications with human-controlled applications, like the control of lighting, heating, food preparation, washing, energy management, water, fire alarms, blinds, security, etc.
The growing use of home and building networks to interconnect devices introduces additional challenges to maintaining functional safety because of possible chances of device interactions.
EN 50090-5-2