MADDALENA GRADUS, User Manual

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8
Battery lifetime, estimated 11 years + 1 year storage
Data storage 132 monthly values and 132 semi-monthly values
Display 7 special characters
Interfaces Standard: infrared
Optional: wireless M-Bus
Remote temperature sensor
Sensor type NTC preaged
Length of cable 2 m
Dimensions of cover height 26 mm / width 12 mm / depth 10 mm
10 I
NTERFACES AND
O
PTIONS
10.1 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
10.2 Radio interface wireless M-Bus (optional)
The radio interface is for the transmission of meter data (absolute values).
General information about the radio interface:
During installation of radio components the presence of bulky 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.
The factory-setting of the clock in the heat cost allocator 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 ’ .
10.2.1 Technical data radio
Frequency 868 MHz
Transmission power up to 12 dBm
Protocol wireless M-Bus based on EN 13757-3
Selectable modes S1 / T1 / C1
Telegrams - short telegram AMR (in conformity to OMS-Spec_Vol2_Primary_v301):
serial number, date/time, current consumption, due date, due date value, hint
flag, time of hint flag
- long telegram for walk-by read-out:
serial number, date/time, current consumption, due date, due date value,
15 monthly values, 15 half monthly values, hint flag, time of hint flag
Encryption AES: Advanced Encryption Standard; key length: 128 bits
10.2.2 Radio configuration
Parameter Possible settings Factory setting
(Battery lifetime, estimated: 11 years + 1)
Mode S1 / T1 / C1; unidirectional T1; unidirectional
Transmission period 00:00 - 24:00; any time period in the day 7:00 am - 7:00 pm