Glossary
M-Bus
Standard protocol (also: Meter-Bus) for remote reading of data acquired from thermal energy, electricity, gas and water meters. M-Bus is fully compliant with EN 13757: Communication Systems for remote meter reading, parts 2 (Physical and connection layer) and 3 (Application layer)
Main line
KNX bus line to which other bus lines are connected
MID
Measurements Instruments Directive (2014/32/EU) on the harmonisation of the laws of the Member States relating to the making available on the market of measuring instruments. The Directive establishes the requirements that measuring instruments have to satisfy with a view to their being made available on the market and/or put into use for the measuring tasks. It is the recast of the 2004/22/EC on measuring instruments
Modbus
Open source, standard communication protocol suitable for master/ slave data exchange between smart devices in various applications, such as industrial production, infrastructure, transportation and energy management
MU
Modular Unit: standardized unit size (width) for devices to be installed in boards or cabinets on installation rail according to EN 60715 (1 MU corresponds to 18 mm)