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Technical data radio interface
Frequency band:
868 MHz
Radio protocol:
Wireless M-Bus (EN 13757-4) and according to
the Open Metering Standard.(OMS) different ra-
dio telegram contents are possible.
Data transmission:
unidirectional, Standard T1-Mode (bidirectional
devices and other modes upon request)128-bit
AES encryption.
Transmission interval:
depending on the used lithium battery and de-
pending on whether the meter has additional
inputs whose data will be transferred with. For
example: zelsius C5 with C-cell, no additional in-
puts: Standard 20 seconds; other configurations
are possible.
Transmitting power:
up to 25 mW
Content radio data protocol (Standard)
Example
Heat Meter
Unit
Medium
Thermal energy
Producer
ZRI
Serial number
12345678
Version
12
Main energy meter
123456
kWh
Main volume meter
123456
L
Energy meter (consumption) on deadline
23456
kWh
Date of deadline
2013.12.31
Volume flow
127
l/h
Performance
329.7
W
Supply temperature
44.3
°C
Return temperature
25.1
°C
Error Code
0
Last previous month value
3456
kWh
other protocol values on request
Important Note
Devices, which are in sleep mode (Display: SLEEP 1) have to be activated
through keypress until the energy display shows up.
The optical interface has to be activated by means of the OptoHead through
keypress before reading out of the de vice.
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Summary of Contents for zelsius C5-IUF
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