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Ring topology
Wireless M-bus devices
Web server permits wireless read out using various network topologies. The RF converter is
self-organizing and searches for the optimum connection to the web server (mesh network).
RF network topology
M-bus wired devices
Address
M-bus uses two types of addresses to recognize devices:
●
Primary addressing: Up to 250 primary addresses can be assigned to an M-bus system.
The primary address is normally assigned during device commissioning.
●
Secondary addressing: Secondary addressing consists of 8 bytes and permits the
assignment of any number. In the default setting, the secondary address for a device
matches the serial number issued by the device manufacturer. The assignment prevents
address conflicts on the bus.
Bus expansion
Plant type
Small residential
buildings
Large residential
buildings
8
Siemens
Building Technologies
5 m
5 m
5 m
Maximum
Total cable
distance
length
350 m
1000 m
350 m
4000 m
5 m
5 m
5 m
Cable cross-
Number of
section
devices (slaves)
0.8 mm
250
2
0.8 mm
250
2
64
Max.
transmission rate
9600 baud
2400 baud
9600 baud
A6V11157961_en--_d
2018-07-24
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