25
The radio interface is always deactivated at delivery. To activate the device,
no soware is required. Only the activated sleep mode has to be nished:
Devices that are in sleep mode (Display: SLEEP 1) must be activated by at
least ve second press of the button until the energy display appears. The
radio energy meters are equipped with an internal antenna.
General technical
data
wireless M-Bus LoRaWAN
TM
Frequency: 868 MHz 868 MHz
Radio protocol:
Wireless M-Bus (EN 13757-4) and
according to the Open Metering
Standard (OMS) dierent radio
telegram contents are possible
according to LoRa specica-
tions
Data transmission:
unidirectional, standard: Mode T1
(other modes on request), 128-bit
AES encryption
LoRa Device Class A
Sending interval:
depending on the used
lithium battery and if the meter
is equipped with pulse inputs
whose data are also transmitted
Standard: 120 seconds; further
congurations on request
Daily or monthly (incl. half
month values), temporary ≥
15 minutes
Note:
Diagnosis protocol see sepa-
rate description
Transmission
power:
up to 25 mW up to 25 mW
Example for wireless M-Bus radio protocol
Example Heat meter Unit
Medium Thermal energy
Manufacturer ZRI
Serial number 12345678
Version 12
Main energy meter 123456 kWh
Main volume meter 123456 L
Energy meter (consumption) on due date 119230 kWh
Date last due date 01.01.2019
Volume ow 127 l/h
Heating power 2828 W
Supply temperature 44.3 °C
Return temperature 25.1 °C
Error code 0
Last previous month value 121234 kWh
Other protocol values on request
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