Pagina 37 di 93 Codice doc. 1080622209
Versione: 2022_02_21
Salvo modifiche tecniche
Operating Instructions
Communication Interfaces S3(C)
1 Interfaces and Options
1.1 Optical (infrared) interface
For communication with the optical interface an optocoupler and the “Device Monitor” software are necessary.
The optocoupler and “Device Monitor” are available as accessory equipment.
The optical infrared interface will be activated by automatically sending a header (according to EN 13757-3). Baud
rate: 2400 baud.
Then you can communicate with the meter for 4 seconds. After every valid communication the meter is open for
another 4 seconds. Afterwards the display is deactivated.
The number of read-outs per day via the optical interface is limited. During daily read-out at least 4
communications are possible. If read-outs are carried out more rarely, the possible number of communications will
increase.
1.2 M-Bus (optional)
The M-Bus is a galvanically isolated interface for the transmission of meter data
(absolute values).
General information about the M-Bus interface:
It is important to note that the acknowledged state of the art technology rules
and the relevant legal restraints (international and local; see “Relevant Norms /
Standards / Literature M-Bus”) are to be observed.
The installation has to be performed by authorized, skilled persons.
If the regulations and the information in the installation and operating instruction
manuals are not strictly followed, or if the installation is shown to be faulty, any
resulting expenses will be charged to the company responsible for the installation.
Recommended type of cable: Telephone cable J-Y(ST)Y 2x2x0.8mm².
It is important to make sure that the topology of the M-Bus network (cable lengths and cross-sections) is suitable
for the
baud rate (2400 Bd)
of the end instruments.
1.2.1 Relevant norms / standards / literature M-Bus
IEC 60364-4-41 (2005-12)
Low-voltage electrical installations - Part 4-41: Protection for safety -
Protection against electric shock
IEC 60364-4-44 (2007-08)
Low-voltage electrical installations - Part 4-44: Protection for safety -
Protection against voltage disturbances and electromagnetic disturbances
IEC 60364-5-51 (2005-04)
Electrical installations of buildings - Part 5-51: Selection and erection of
electrical equipment - Common rules
IEC 60364-5-54 (2011-03)
Low-voltage electrical installations - Part 5-54: Selection and erection of
electrical equipment - Earthing arrangements and protective conductors
EN 50310 (2011)
Application of equipotential bonding and earthing in buildings with
information technology equipment
EN 13757-1_2015, -2_2004,
-3_2013
Communication systems for meters and remote reading of meters
The M-Bus
A Documentation, Version 4.8, M-Bus User group
1.2.2 Additional technical specifications
The installation has to fulfill the requirements of the relevant norms / standards / literature (see paragraph 2.1) and
the specifications as follows:
Maximum voltage M-Bus
42 V
Minimum voltage M-Bus
24 V
