Bus System; Description; M-Bus Interface; M-Bus Signals - IntesisBox IBMBSMEB0100000 User Manual

Modbus Server – M-Bus
®
IntesisBox
2 M-Bus System
In this chapter, a brief description of functionality and features of M-Bus is provided.

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 to their devices an
M-Bus interface, enabling them to be interconnected and remote measured through a 2-wire bus based on the
standards of M-Bus. There are many manufacturers of these measurement devices incorporating M-Bus interface
and also some other manufacturers of specific communication M-Bus devices like bus repeaters, EIA232/EIA485 to
M-Bus level converters, etc.

M-Bus interface

The gateway connects to the M-Bus system directly without requiring an external level converter.
Connection to the M-Bus is done by EIA485 connection. Notice that the the gateway is also powering the bus, so no
extra hardware is required to connect with M-Bus compatible meters or devices.

M-Bus signals

IntesisBox Modbus Server - M-Bus can read the following type of signals offered by M-Bus devices:
- Energy meters:
•
Energy (kWh or J).
•
Volume (m3, feet3, gallon).
•
Power (kW or J/h).
•
Volume flow (m3/h, m3/min or m3/s, gallon/h, gallon/min, gallon/s).
•
Mass flow (kg/h).
•
Flow Temperature (°C).
•
Return Temperature (°C).
•
Temperature difference (K).
•
External Temperature (°C).
•
Temp. limit (°C).
•
Pressure (Bar).
•
Vols (volts).
•
Amps (amps).
•
H.C.A., without units. (Multipurpose signal used, for example, by some energy meters to offer the readings
of auxiliary pulse counter inputs of the device).
•
On Time, normally in hours but depends on the meter.
•
Operating Time, normally in hours but depends on the meter.
•
Averaging Duration, normally in hours but depends on the meter.
•
Actuality Duration, normally in hours but depends on the meter.
•
And others.
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