Electricity metering data exchange - The DLMS/COSEM suite - Part 3-1: Use of local area networks on twisted pair with carrier signalling

IEC 62056-3-1:2021 is available as IEC 62056-3-1:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62056-3-1:2021 describes two sets of profiles: the first set of profiles allows a bidirectional communication between a client and a server. This set of profiles is made of three profiles allowing local bus data exchange with stations either energized or not. For non-energized stations, the bus supplies energy for data exchange. Three different profiles are supported:

？ base profile: this three-layer profile provides remote communication services;

NOTE 1 This first profile was published in IEC 61142:1993 and became known as the Euridis standard.

？ profile with DLMS: this profile allows using DLMS services as specified in IEC 61334 4 41;

NOTE 2 This second profile was published in IEC 62056-31:1999.

？ profile with DLMS/COSEM: this profile allows using the DLMS/COSEM Application layer and the COSEM object model as specified in IEC 62056 5 3 and in IEC 62056 6 2 respectively.

The three profiles use the same physical layer and they are fully compatible, meaning that devices