E Q U O B O X S I N . E Q L C 2 5 0
–
U s e r G u i d e R e v . 1 . 0
S I N A P S I S . r . l . |
V i a d e l l e Q u e r c e 1 1 / 1 3 - 0 6 0 8 3 B A S T I A U M B R A ( P G )
–
I t a l y
T . + 3 9 0 7 5 8 0 1 1 6 0 4 - F . + 3 9 0 7 5 8 0 1 4 6 0 2 |
w w w . s i n a p s i t e c h . i t - i n f o @ s i n a p s i t e c h . i t
3
1.
M-BUS OVERVIEW
1.1
DESCRIPTION of the M-Bus System
The M-Bus (Meter Bus) system is a communication protocol compliant with the EN13757-2 standard.
The M-Bus System provides the following advantages:
•
High level of data transmission security
•
Low wiring costs
•
Long distances without requiring repeaters
•
Large number of central units
•
Detection of both battery-powered and mains-powered devices
•
Automatic device recognition
•
Vast array of systems and components available
•
Different types of bus topology: linear, star, and tree
Figure 1 - Bus topologies
1.2
Addressing
The M-Bus uses two types of addressing modes to detect the devices:
•
Primary address: up to 250 primary addresses can be allocated within an M-Bus plant. The
primary address is normally allocated while setting up the central units.
•
Secondary address: the secondary address consists of 8 bytes and allows the allocation of any
number. By default, the secondary address of the devices is the same as the manufacturer
serial number. This type of allocation prevents bus conflicts.
