Siemens UH50 Series Manual page 24

Function data
Note
Power supply
Pulse inputs
Note
RF modules, 868 MHz,
WZU-RF/WZU-RF-EXT
Function data
Note
Data output conforming
to OMS
24 / 40
Siemens
Building Technologies
The RF module (WZU-RM) permits wireless readout from distances of up to 100
meters. The module features 2 additional pulse inputs for counting external meter-
ing pulses.
The RF module must be plugged into socket 2 of the meter. Operation with a pulse
module in "fast pulses" mode is not allowed.
The module is powered via the heat meter. To reduce power consumption, the
sampling rate can be extended using a jumper or the transmitter power can be
reduced.
If the meter is to be powered by a battery, a D-cell must be used.
With regard to the pulse inputs, please note:
Connect only potentialfree contacts (Reed contacts)
Inputs and electronics of the meter are not galvanically isolated
External power supply or earthing is not permitted
Meter ID, pulse valency and the meter readings for the pulse inputs can be prede-
fined by telegram.
In the RF module, the pulses are not multiplied by their pulse valencies. The pulse
valencies are merely stored in one register each for information. The assignment is
made only when the data read out are evaluated.
The RF modules (WZU-RF and WZU-RF-EXT) enable the meter to communicate
wirelessly with a center using 868 MHz radio frequency. They support data trans-
mission conforming to OMS and DSMR.
When operating in conformance with DSMR, the meter time can be set. The maxi-
mum range is 400 meters.
The module must be plugged into socket 2.
The module is available in 2 different versions:
WZU-RF Module with internal antenna
WZU-RF-EXT
The following data are available:
Current energy
Current volume
Current power
Ultrasonic heat and cooling energy meters UH50..
Module with external antenna
CE2N5324en
2013-01-14