Doc. code 1080100090
Version: 2015_03_03
8
Power supply
3 V lithium battery
Battery lifetime, estimated
years
Standard: 10 years; 6 years + 1 with pulse output: see
“Influencing_factors_battery_lifetime”.
Data storage
E
2
PROM; daily
Display
8 special characters
Interfaces
standard
Infrared
optional
M-Bus galvanically isolated; M-Bus galvanically is 2 pulse inputs;
wireless M-Bus; wireless M-Bus + 2 pulse inputs; pulse output
Temperature Sensors
Sensor type
platinum precision resistor Pt500
Connection type
2-wire system
Diameter
mm
5 (optional 5.2 or 6)
Length of cables
m
1.5 (optional 3)
9
Interfaces and Options
9.1
Optical (infrared) interface
For the communication with the optical interface an optocoupler and the ‘Device Monitor’ is necessary. The
optocoupler and the ‘Device
Monitor’ software are available as accessory equipment.
Baud rate: 2400 baud
The optical (infrared) interface is activated by pressing the push-button.
If within 60 seconds neither a valid telegram is received nor the push-button pressed again, the interface is
deactivated. The number of read-outs via the optical interface is limited to 300 times per day.
9.2
M-Bus (optional)
The M-Bus is a galvanically isolated interface for the transmission of meter data (absolute values).
9.3
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 9.3.1 “Relevant norms, standards and literature”) 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.
Further information can be found in the detailed ‘Application Note M-Bus’ at www.engelmann.de.
9.3.1
Relevant norms, standards and literature on the 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 (2010)
Application of equipotential bonding and earthing in buildings with
information technology equipment
