Apator AT-WMBUS-04 Installation guide

4
RF module
AT-WMBUS-04
with pulse input
Operation and maintenance documentation
WWW.TELEMETRIA.EU
DT2013041201DJ

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1. INTRODUCTION..........................................................................................................................................2
TABLE OF CONTENTS:
2. STRUCTURE...............................................................................................................................................2
3. DESCRIPTION OF THE OPERATION........................................................................................................3
4. INSTALLATION............................................................................................................................................4
5. TECHNICAL PARAMETERS.......................................................................................................................5
6. ENVIRONMENTAL PROTECTION..............................................................................................................5

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The AT-WMBUS-04 RF module with pulse input is used both in the stationary Wireless M-Bus reading
system, as well as in the drive-by system, to record indications of the water meter connected to it, by counting
individual pulses and transmitting them over the radio in the band of 868.95 MHz, in accordance with
EN13757-4.
The housing of the AT-WMBUS-04 module is made of non-combustible ABS plastic and has been adapted
for mounting with screws and wall plugs. A two-wire conduit used to connect to the water meter is led from the
device through a cable gland.
In addition, the module is equipped with an internal wire antenna and a built-in lithium battery 3.6 V, allowing the
device to operate for a maximum of 144 months. However, depending on the type of saved profile, this period
can be significantly shortened. Moreover, there is a reed switch inside the module that acts as a magnet
position sensor.
1.
INTRODUCTION
2.
STRUCTURE
Figure 1. AT-WMBUS-04 RF module

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The AT-WMBUS-04 RF module with pulse input is used to record the indications of the water meter
connected to it and to transfer them over the WM-Bus radio interface in the band of 868.95 MHz.
The number of pulses counted by the module is stored in an internal buffer, whose capacity allows to count
up to 999999999 pulses. The data is then transmitted over the radio, in accordance with the saved profile. It is
also possible to remember the state of counted pulses on a given day of the month, with up to 12 such states
(for each month) before the oldest data will be overwritten by the latest one. The profile, according to which the
module works, can be saved at the production stage, or changed at a later date using PDA, with full freedom of
the device configuration.
Each module has its own unique radio number (ID), allowing for unambiguous identification of the device in
the telemetric system.
Parameters that can be set in the profile for the AT-WMBUS-04 module:
•Water meter number,
•Date and time,
•Access code,
•Time of transmission (from - to),
•Day of monthly volumes,
•Days of work (transmitting),
•Pulse:
1; 2,5; 10; 25; 100; 250; 1000 l/imp,
•Current volume,
•Minimum flow threshold,
•Maximum flow threshold,
•Defined number of leaks,
•Shut-down threshold,
•Maximum number of stop days,
•
The period of transmitting of the configuration
frame,
•The period of transmitting of the WMBus frame,
•Configuration frame power,
•WMBus frame power,
•RSSI threshold,
•WMBus frame configuration.
Configuration of the WMBus frame of the AT-WMBUS-04 module:
•History of max. flow breakdowns,
•History of water leak breakdowns,
•History of the magnetic field application
breakdowns,
•Time of the magnetic field application breakdown,
•Voltage,
•Battery in days,
•Volume history,
•Monthly volume,
•Water meter number,
•Overlay time.
Alarms reported by the AT-WMBUS-04 module:
•Stop of the water meter,
•Magnet application.
3.
DESCRIPTION OF THE OPERATION

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The AT-WMBUS-04 RF module with pulse input is assembled with two mounting holes using screws and
wall plugs. Access to the mounting holes is possible after removing the housing lid. Before installing the device
on the wall, check the radio signal level. The device does not require an external power source and after
installation, it is immediately ready for operation.
The module can cooperate with many measuring devices equipped with an open collector pulse output or
reed switch and generating pulses with a minimum duration of the short circuit (breaking) equal to 65 ms. The
test voltage at the pulse input of the module is 3 V and the test current falls in the range of 0.5 mA to 1 mA.
When connecting the module to a measuring device with an open collector pulse output, it is important to
maintain the correct polarity of the connection cables. In this case, connect the module with the measuring
device as described in the figure below.
4.
INSTALLATION
Figure 2. AT-WMBUS-04 RF module

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Data transmission protocol: Wireless M-Bus
Operating frequency: 868.95 MHz band
Transmission type (data reading): One-way
Transmission type (configuration): Two-way
Transmission rate: 100 kbit/s
Power output: 10 mW
Power output level stability: +1 dB / -3 dB
Antenna: internal, wire type, 1/4 λ
Modulation: FSK, frequency deviation: ±50 kHz
Receiver sensitivity: -105 dBm
Power supply: Lithium battery, 3.6 V; 1/2 x AA
Battery life: depending on the profile (maximum 144 months)
Operating temperature range: 0°C to +55°C
EM immunity: according to EN 1434
Ingress protection rating: IP 65
Dimensions (L x W x H): 89 x 75 x 42 mm
DO NOT DISPOSE OF WASTE BATTERIES, ELECTRONIC OR ELECTRICAL EQUIPMENT TO
HOUSEHOLD WASTE COLLECTION BINS UNDER THE PAIN OF FINE.
Batteries and electronic and electrical equipment contain many substances hazardous to the
environment; they must be disposed of and processed by a licensed disposal facility according to local laws. Ask your local
authorities or city waste management for further information.
Measuring device
output
Module
input
Wire colour
collector +3V white
emitter GND brown
5.
TECHNICAL PARAMETERS
6.
ENVIRONMENTAL PROTECTION
Figure 3. Connection of the module with the open collector pulse output