CLC/TC 205A/WG 09 - Revision of EN 50065

This standard applies to electrical equipment using signals in the frequency range 3 kHz to 148,5 kHz to transmit information on low voltage electrical systems, either on the public electricity distribution network or within installations in consumers’ premises. It specifies the frequency bands allocated to the different applications, limits for the terminal output voltage in the operating band and limits for conducted and radiated disturbance. It also gives the methods of measurement. It does not specify the modulation methods, the coding methods or functional features (except those for the prevention of mutual interference). Environmental requirements and tests are not included. NOTE 1 Compliance with this standard does not imply permission to establish communication with locations outside the consumer’s installation or with other consumers through the public electricity distribution network where this would not otherwise be allowed. The object of the standard is to limit mutual influence between transmission equipment in electrical installations and between such equipment and other equipment. In addition this standard is intended to limit interference caused by signal transmission equipment to sensitive electronic equipment. However, complete freedom from such interference cannot be assured. NOTE 2 Designers should consider signalling systems in conformance with this standard when determining immunity for electrical equipment.

This document applies to mains communicating equipment (MCE) using signals in the frequency range 3 kHz to 526,5 kHz to transmit information on low voltage electrical systems, either on the public electricity distribution network, within installations in consumers’ premises which are connected to the public electricity distribution network or within installations separated from the public electricity distribution network. NOTE 1 Installations separated from the public electricity distribution network can be operated in DC. Typical applications include MCS communication between photovoltaic panels and inverters over a DC bus in photovoltaic power generating system. Requirements specific to such installations are given in Annex G. It specifies the frequency bands allocated to the different applications as well as conducted and radiated emission limits, including conducted emission limits for the transmitter output signal voltage in the operating band. It also specifies the required measurement methods. It does not specify modulation methods, coding methods or functional features (except those for the prevention of mutual interference). Environmental requirements and tests are not included. NOTE 2 Compliance with this document does not imply permission to establish communication with locations outside the consumer’s installation or with other consumers through the public electricity distribution network where this would not otherwise be allowed. MCE can fall into one of the following categories: a) MCE implementing transmission or reception of information on low voltage electrical systems as the sole function. General requirements, frequency band allocation and emission limits applicable to such equipment are entirely covered by this document. b) MCE being equipment within the scope of other standards, integrating mains communication as one of their functions. In this case, only the general requirements, frequency band allocation and emission limits for the mains communication function of such equipment are covered by this document. Requirements for all other available functions of this equipment are covered by the relevant product standard. This document aims at contributing to EMC by limiting the mutual influence of different MCE or different mains communicating systems (MCS) operated in the same environment. In addition, this document is intended to limit interference caused by MCE signal transmission to general electrical equipment.