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M-BUS to BACnet/IP Server Gateway
M-Bus System
6. M-Bus System
6.1. General Description
The M-Bus ("Meter-Bus") is a European standard for remote reading of heat meters, and it is also usable for all
other types of consumption meters, as well as for various sensors and actuators.
M-Bus standards are:
• EN 13757-2 (physical and link layer)
• EN 13757-3 (application layer)
Many manufacturers of energy meters, pulse counters, water meters, electricity meters, etc., add an M-Bus
interface to their devices, enabling them to be interconnected and remotely monitored through a 2-wire bus
based on the M-Bus standards. There are many manufacturers of these measurement devices incorporating
the M-Bus interface, and also some other manufacturers of specific M-Bus communication devices such as bus
repeaters, EIA-232/EIA-485 to M-Bus level converters, etc.
6.2. M-Bus Interface
The gateway connects directly to the M-Bus system. No external level converter is required.
Connection to the M-Bus is made via the EIA-485 connection. Notice that the gateway also powers the bus, so no
extra hardware is required to connect to M-Bus compatible meters or devices.
6.3. M-Bus Signals
The gateway supports several meter magnitudes and units typically used on the energy, electric, water, and other
meters. During the scan, the gateway imports each signal with the units and details provided by the meter. See
the details of the units on the
Signals tab (page 21)
in Intesis MAPS.
The type of signals available from every meter may differ, depending on the manufacturer and model. Please
refer to the device's technical documentation to determine the signals available for a given meter to integrate
the desired ones.
Besides this, to simplify and speed up the identification of the signals offered by any device (and their type), a
scanning function has been embedded in the firmware of the gateway to poll the meter and show details about
the signals offered by the device and the corresponding signal code needed in the signals list of the gateway for
every one of the signals to integrate, using the Intesis MAPS configuration tool.
Page 14 of 22
USER MANUAL Version 1.0.0
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