BS EN 62056-42:2002

What is BS EN 62056-42 – COSEM three-layer connection profile for data exchange about?  

DLMS/COSEM is the global standard for energy & water smart management, advanced control and innovative utility meter data exchange. It specifies an object-oriented data model, an application layer protocol and media-specific communication profiles. 

BS EN 62056 is a European Standard series that discusses electricity metering and data exchange for meter reading, tariff and load control. 

BS EN 62056-42 is the 42nd  part of the BS EN 62056 series that specifies the physical layer services and protocols within the Companion Specification for Energy Metering (COSEM) three-layer connection oriented profile for asynchronous data communication. 

In annex A of BS EN 62056-42, an example of how this physical layer can be used for data exchange through the Public Switched Telephone Network (PSTN) using intelligent Hayes modems is given. 

Annex B of BS EN 62056-42 gives an explanation of the role of data models and protocols in electricity meter data exchange. 

Note 1: BS EN 62056-42 does not specify physical layer signals and mechanical aspects.  

Note 2: Local, implementation-specific issues are also not specified in BS EN 62056-42. 

Who is BS EN 62056-42 - COSEM three-layer connection profile for data exchange for?  

BS EN 62056-42 on COSEM three-layer connection profile for data exchange is relevant to:  

• Electric supply meter device manufacturers 
• Power distribution and transmission companies 
• Utility companies 
• Local authorities 
• Regulatory bodies 
• Quality control and testing personnel 
• Engineers 

Why should you use BS EN 62056-42 - COSEM three-layer connection profile for data exchange? 

COSEM includes a set of specifications that defines the transport and application layers of the DLMS protocol that are of significance to the successful large-scale roll outs of systems such as smart metering systems that contain a large number of end-devices. The COSEM objects provide several mechanisms, like selective access, compact data types, and compact encoding to ensure high efficiency. 

BS EN 62056-42 walks you through service and protocol specifications required for secure data exchange within smart utility meters and similar devices as messages between the end devices / meters may need to be transported to the applications of utilities, energy service providers and 

similar organizations through a number of devices and the communication links between them. Therefore, BS EN 62056-42 can contribute to providing application level, end-to-end security that ensures confidentiality, authenticity, and proof of origin between the end points. 

Thus, by complying with BS EN 62056-42 guidelines, you can ensure safe interoprability and system integration with efficient data exchange between devices.