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Page 40 of 71 Article no.: 1080621019 2021_12_10 Subject to technical change! Errors excepted.
Maximum ripple voltage
200 mV; EN 13757-2_2004; 4.3.3.6
Maximum voltage potential
differences
2 V
1.2.3 Technical data M-Bus
Primary address
0 (factory setting); 1 - 250 (configurable)
Baud rate
2400; 300
Connecting cable length
1 m
Number of possible read-outs
unlimited
Refresh of data
120 s; using a power pack: 2 s
1.3 Radio interface wireless M-Bus EN 13757-3, -4 (optional)
The radio interface is for the transmission of meter data (absolute values).
General information about the radio interface:
Installation of radio components between or behind heating pipes, or the presence
of other bulky metallic obstacles directly over or in front of the housing must be
avoided.
The transmission quality (range, telegram processing) of radio components can be
negatively influenced by instruments or equipment with electromagnetic emissions,
such as telephones (particularly LTE mobile radio standard), wi-fi routers, baby
monitors, remote control units, electric motors, etc.
In addition, the construction of the building has a strong influence on the transmission range and coverage.
Furthermore, when using installation boxes (substations) they must be equipped with non-metallic covers or doors.
The factory-setting of the clock in the meter is standard (winter) Central European Time (GMT +1). There is no
automatic changeover to daylight savings (summer) time.
The radio function is deactivated upon delivery (factory-setting). See section “Activation of the radio interface”.
1.3.1 Technical data radio
Frequency
868 MHz
Transmission power
up to 12 dBm
Protocol
wireless M-Bus based on EN 13757-3, -4
Selectable modes
S1 / T1 / C1
Telegrams
-
short telegram in conformity to AMR (OMS-Spec_Vol2_Primary_v301 and _v402):
energy (heat/cooling energy, pulse input 1 to pulse input 3), total volume, flow,
power, information message, outlet flow temperature, temperature difference
-
long telegram for walk-by read-out: energy (heat/cooling energy, pulse input 1 to
pulse input 3), total volume, information message, 15 monthly or 30 semimonthly
values (compact mode)
Encryption
AES: Advanced Encryption Standard; key length: 128 bits
1.3.2 Radio configuration
Parameter
Possible settings
Factory setting
(Battery lifetime, estimated: 10 years)
Mode
S1 / T1 / C1; unidirectional
T1 (unidirectional)
Transmission period 00:00 - 24:00; any time period in the day
8:00 am - 6:00 pm
Transmission interval 10 seconds - 240 minutes
120 seconds (heat meters)
Weekdays
Monday – Sunday (any weekday)
Monday - Friday
Weeks in a month
1 – 4 (4: uninterrupted, incl. a possible 5
th
week)
1 – 4 (4: uninterrupted)
Months
1 - 12
1 - 12
Radio activation date 01.01. - 31.12. (day. month)
not set