In 2016, 'Netbeheer Nederland' introduced the specification 'DSMR P1 V5.0.2'. The aim was to create a standardized interface to provide consumers with measurement data from the 'Automatic Meter Reading' system for electricity, heat, gas, and water meters.

All network operators who are members of 'Netbeheer Nederland' have committed themselves to this interface specification. This is to facilitate the market for Home/Consumer Energy Management Systems (HEMS/CEMS) and to prevent different variations of the interface.

At the start of the rollout of digital meters in Belgium, the Belgian grid operators decided to use the 'DSMR P1 V5.0.2' specification (see DSMR-P1) as much as possible. This is to support the existing market of Home Energy Management Systems, which are based on this.

Digital consumer meters are only installed in residential installations. Industrial AMR meters are installed for higher power segments. The eMUCS-A1 interface specification was introduced to address the need for an additional specification for this market segment.

This eMUCS-A1 document is also derived from the 'DSMR P1 V5.0.2' specification, with the same philosophy as the eMUCS-P1 for digital consumer meters.

Due to Belgian legislation and specific needs for industrial AMR meters, the A1 interface is not completely identical to that specified by 'Netbeheer Nederland' or that for residential digital meters. The main differences can be found in the dataset of the 'A1 telegram'.

However, the physical interface (and protocol) are identical to the DSMR-P1 specification to avoid incompatible hardware.

Here the ETH to a1 converter is a product specifically designed for use with the Landis+Gyr E660 electricity meter.

It converts the IP communication of the E660 to Fluvius standard A1.