This file BS EN 13757-2:2018 is free to download.
Name:Communication systems for meters Part 2: Wired M-Bus communication
Format:pdf
Size:5.98M

Introduction
This European Standard belongs to the EN 13757 series, which covers communication systems for meters, EN 13757-1 contains generic descriptions and a communication protocol. EN 13757-3 contains detailed description of the application protocols especially the M-Bus Protocol. EN 13757-4 describes wireless communication (often called wireless M-Bus or wM-Bus) EN 13757-5 describes the wireless network used for repeating, relaying and routing for the different modes of EN 13757-4. EN 13757-6 describes a twisted pair local bus for short distance(Lo-Bus). EN 13757-7 describes transport mechanism and security methods for data. The Technical Report CEN/TR 17167 contains informative annexes from En 13757-2, EN 13757-3 and EN 13757-7.
An overview of communication systems for meters is given in EN 13757-1, which also contains further definitions.
The Physical and Link Layer parameters for baseband communication over twisted pairs have first been specified in EN 1434-3: 1997(M-Bus) for heat meters. This standard is a compatible and interworking update of a part of EN 1434 3: 2015 and includes also other measured media(e.g. water, gas, thermalenergy, heat cost allocators)， the master side of the communication and newer technical developmentsIt should be noted that EN 1434-3: 2015 covers also other communication techniques.
It can be used with various application layers especially the application layer of EN 13757-3

1 Scope
This European Standard is applicable to the physical and link layer parameters of baseband communication over twisted pair (M Bus) for meter communication systems. It is especially applicableto thermal energy meters, heat cost allocators, water meters and gas meters.
NOTE
It is usable also for other meters (like electricity meters and for sensors and actuators For generic descriptions concerning communication systems for meters and remote reading of meters see EN 13757-1.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and indispensable for its application. For dated references, only the edition cited applies.For undate references, the latest edition of the referenced document (including any amendments) applies.
EN 13757-11 2014 Communication systems for meters- Part 1: Data exchange
EN 60870-5,(all parts)， Telecontrol equipment and systems (IEC 60870-5 series)

Download here:BS EN 13757-2:2018