en
Operating instructions
Radio module WZU-RF, WZU-RF-EXT
27.10.2017
Translation
Radio module WZU-RF, WZU-RF-EXT
Subject to change
5
1.
Safety information
Comply with ESD protection measures.
Avoid short-circuits on the PCB
Route connecting cables through the cable grommets
of the meter only.
Do not cut the grommets shorter than necessary
since this may lower the degree of protection.
Changes in the data telegram or the transmission
rate affect the battery life.
The meter sends no data telegram after delivery ex-
factory. The transmission starts after the installation
of the meter.
The module must not be plugged in during test-
ing / calibrating a meter on a test bench! For mount-
ing or removing the module, the 6-pole connector
shall be used for handling only!
2.
Description of function
The radio module
(firmware
≥
4.69, see label on the rear side)
is
an
add-on module for the following types of meter: T550
(UH50…)
firmware ≥ 5.17
and T550
(UC50…)
.
Note:
For meter of the type T550
(UH50…)
firmware
≥
5.23, new functions are available (C1 mode, OMS
4.1.2 with security profile B).
The module enables the meter to communicate with a mobile
or stationary receiver using 868 MHz radio frequency.
The module supports OMS
1
- compliant data transmission.
The radio module is available in 2 different versions:
x
With integrated antenna (WZU-RF)
x
With external antenna (WZU-RF-EXT; cable length about
2,50 m)
1
) Open Metering System Specification: Industry standard of a community of interest of
companies and associations. It develops open and vendor independent specifications for
communication interfaces and basic requirements for meters - http://oms-group.org
3.
Installation and assembly
Up to 2 communication modules can be installed.
Number
Description
1
Service button (under the housing cover)
2
Slot “m
odule 1
”
3
Slot
“m
odule 2
”
4
Bushing for power cable
5
Cable grommets
Note:
You will find the permitted module combina-
tions in the respective Technical Description. The
radio functions depend on the T550 firmware.
Installing the communication module
The communication modules are connected via a 6-pole reac-
tion-free connector so that installation or replacement is possi-
ble at any time.
To install a communication module proceed as follows:
x
Press the 4 side lugs of the housing cover inwards and
remove the cover.
x
Put the communication module into the correct position.
Note:
The module WZU-RF and WZU-RF-EXT may
be fitted at slot module 2 only.
x
Place the communication module carefully in both guide
slots and push it in.
x
To connect the antenna of WZU-RF-EXT, open one grom-
met matching the cross section of the antenna cable.
Note:
Open the cable grommets in such a way that
they enclose the cable tightly.
x
Guide the antenna cable through the grommet from out-
side.
x
Plug the antenna cable to the module.
Note:
When retrofitting a meter with radio module, the
voltage supply must be checked and, if necessary,
replaced. A battery type D or a power supply is re-
quired to operate a radio module.
4.
OMS-compliant data output
The meter
sends data telegrams acc. to the “open metering
system specification
”
:
x
Volume 2 Primary Communication Issue 2.0.0: 2009-07-20
or
x
Volume 2 Primary Communication Issue 4.1.2: 2016-12-16
