Lumel MR03 Series User manual

1
High power radio
transmission module
MR03 type
User’s manual

3
CONTENTS
1.APPLICATION.................................................................................5
2.MR03 MODULE SET.......................................................................6
3.INSTALLATION ...............................................................................6
3.1 Module assembly.....................................................................6
3.2 Connection diagrams .............................................................7
3.3 Connection way with devices ................................................9
3.4 Requirements for lead connections ....................................10
4.PRINCIPLE OF OPERATION OF MR03 MODULE.......................11
4.1 First start of MR03 module ...................................................12
4.1.1 Installation of the configuration program on a PC .........13
4.1.2 Procedure of the MR03 module configuration ...............13
4.1.3 List of displayed errors in the systemic window . ...........15
4.1.4 Prescription concerning radio transmission
or sending-receiving devices which can be used
without permission . .......................................................16
5. ACCESSORIES ...........................................................................17
6.TECHNICAL DATA .......................................................................19
7.ORDER CODES ...........................................................................21
8.MAINTENANCE AND WARRANTY .............................................22

5
1. APPLICATION
The MR03 high power radio transmission module is destined to change
the information transmission medium from the cable transmission with
RS-232 and RS-485 interface into a wireless transmission in the radio
channel in the non-licensed band 869.40 – 869.65 MHZ with the output
power 500 mW.
The module MR03 finds application in telemetric system applications, in
which there is no technical possibilities to conduct a cable to connect de-
vices in a wired network. In such cases , the module is used as a bridge
which partially will carry out the transmission through the radio way.
The maximal operation range of the MR03 module is 1.5 km in average,
and depends on the terrain configuration and the applied antenna.
Accessible MR03 working modes:
ltransparent,
lmultipoint,
lpoint-to-point,
allow the creation of an extensive network of radio modules to fit the
needs application requirements.
Necessary parameter changes to the correct module work are carried
out by means of the added configuration program ECon.
An exemplary MR03 module application is presented on the fig. 1.
Fig 1. Example of remote readout of data between KD7 recorder and
analog input module, type SM1 using MR03.
KD7
MR03
MR03SM1
2xinput
4-20mA
2xoutput
4-20mA
KD7
2xoutput
4-20mA

6
2. MR03 MODULE SET
The set of the MR03 module is composed of:
− MR03 module 1 pc.
− Stub antenna with SMA connector 1 pc.
− Antenna wire with SMA connector 1 pc.
− MR03 user’s manual 1 pc.
− warranty card 1 pc.
− mini CD with software
and user’s manual 1 pc.
3. INSTALLATION
Symbols located in this user’s manual mean:
WARNING!
Warning of potential, hazardous situations. Especially im-
portant. One must acquaint with this before connecting the
module.
The non-observance of notices marked by these symbols can
occasion severe injuries of the personnel and the damage of
the module.
CAUTION!
Designates a general useful note. If you observe it, handling
of the transducer is made easier. One must take note of this,
when the instrument is working inconsistently to the expec-
tations.
Possible consequences if disregarded!
3.1. Module assembly
One can fix the module on a wall or a construction by means of a screw
or glue without the lost of the tightness class IP54. The housing is made
of a self-extinguishing plastic.
The fixing of the module by means of a screw connection is carried out
through fixing holes shown on the fig. 2. The access to holes is possible
after removing the upper part of the MR03 module housing.
When unpacking the module, please check whether the type and
execution code on the data plate correspond to the order.

7
Fig. 2 Assembly drawing
3.2. Electrical connections of MR03 module
The supply and external signals must be connected in compliance with
the drawing 3 and table 1, in which the assignment of individual leads of
the MR03 module are described.

8
Description of MR03 module leads Table 1
~
ZW1
Terminal Terminal description
1 Supply line (+ for d.c. current supply)
2 Supply line (- for d.c. current line supply)
3 Functional earthing line (d.c. current supply)
4 TxD line of the RS-232 interface
5 RxD line of the RS-232 interface
6 GND line of the RS-232/RS-485 interface
7 Line B of the RS-485 interface
8 Line A of the RS-485 interface
Marking Description
PWR Module supply
RxRF Reception of radio data
TxRF Emision of radio data
RxD Reception of data from the serial port
TxD Emission of data to the serial port
Description of MR03 module diodes Table 2
Fig.3 Description of MR03 leads

9
3.3. Connection way with devices
The connection way of the MR03 module to RS-232 or RS-485 interfa-
ces is presented on fig. 4 and 5.
Fig. 4
Connection way of the MR03
module to the RS-232 bus
Fig.5.
Connection way of MR03
module to the RS-485 bus.
Caution:
Because of electromagnetic interference, one must use
shielded wires to connect signals of the RS-485 interface.
The shield must be connected to the earthing terminal in one
point. The supply must be connected by a two-wire cable
of appropriate wire diameter. It is recommended to use an
additional protection in the shape of a fusible cut-out.
Marking Description
1Short circuit – switching of a substring for line A
2Short circuit – switching of a substring for line B
3Short circuit – switching of a 150 Ω termination for line A-B
Description of jumper ZW1 configuration Table 3

10
3.4. Requirements for lead connections
Different interference sources practically occurring, interact with the
module in a continuous or pulsing way from the supply network side
(because of other device actions).
The level of this interference should be reduced to a value lower than the
module fastness threshold, first of all through the appropriate installation
of the module in the object.
In order to obtain a full module resistance against elec-
tromagnetic interference in an environment of unknown
interference level, it is recommended to observe follo-
wing principles:
lThere should be a switch or a circuit breaker in the building installation.
This element should be situated near the device, easy accessible for
the operator. It should be marked as the instrument switching the
device off.
ldo not supply the module from the network, near devices producing
high pulse interference,
lapply network filters for a group of modules servicing the same
object,
lapply the general principle, that wires (group of wires) leading
different signals should be led in the highest possible distance
between them (not less than 50 cm) and the crossover of such
groups of wires made at a right angle (90°).
lTaking into consideration electromagnetic interference, one must use
shielded wires to connect RS-485 interface signals. The shield must
be connected to the protective terminal in a single point. The supply
must be connected by two-wire cable with a suitable cross-section
ensuring its protection by means of a cut-out.

11
4. PRINCIPLE OF MR03 MODULE OPERATION
The MR03 radio transmission module enables the radio com-
munication of devices equipped in an RS-232 or RS-485 serial port and
USB converter into RS-232 or RS-485, e.g. PD10 or PD12 type. The
communication with RS-232 or RS-485 interface can be carried out at
rates from 1200 bits to 115.2 kbits.
The radio transmission is realized in the shape of data packa-
ges. The module allows to transmit data of maximal length 256 bytes.
The data transmission is carried out in following way: data bits are col-
lected from the serial port and are rewritten to the reception buffer. After
an appropriate time (“time out”) from the transmission end, placed data
in the buffer are prepared to be transmitted on radio links. In order to
transmit data, frames are created, the structure of which depends on the
selected working mode. The radio module can work in the transparent or
package mode: “multipoint” mode (data are sent from one module and
are received by all modules being in the range) or in the “point-to-point”
mode, where data are sent to a define device.
In transparent mode the data aren’t buffered but sent directly
to the radio interface in packets of 60 bytes. Due to the lack of buffering
and packaging the continuity of the data will be not maintain, and the
spacing between the blocks of data can range up to 150 ms.
In package mode („multipoint”, „point to point”) sent data is
preceded by a special header. Data of the package heading, including
necessary information for data exchange are additionally protected by
CRC checksum.Data received from the serial interface during the radio
transmission are not protected by the checksum.
The reception of radio data consists on the reception of trans-
mitted packages and their transmission to the output buffer of the serial
interface. The reception module verifies the CRC checksum of the he-
ading during the reception. After the heading reception and verification
of its contents in accordance to the set working mode, data are sent in
the serial interface. If a CRC error is discovered, the package is not re-
ceived. In the case of point-to-point working mode, data originating from
the same sender are transmitted in the serial interface. By the „multipoint”
operating mode the group address is checked and the data from the
current group of devices are received.

12
The current module work state is signaled by lighting diodes:
RxD and TxD diodes signals the flow of data through the serial interface,
however RxRF and TxRF diodes signal the flow od data through the
transmission radio channel.
The configuration program takes advantage of one of the accessible
computer serial port and the module MR03.
The configuration is carried out by means of the ECon configuration pro-
gram. The configuration program uses one of the available computer’s
serial ports. Configuration can be done via RS-232 and RS-485 interfa-
ces of MR03 module.
To switch the MR03 module in the configuration mode, one
must press during three seconds (till the lighting of all diodes) SW1
push on the plate and the place indicated on the fig.3. In that moment,
the MR03 module breaks the normal work and transits to the expecta-
tion state for the connection with the configuration program and admits
appropriate settings of its serial port (9600, 8N1).
After the configuration change, one must make the module
reset through the switching of the supply voltage off or by giving the
command “Restart” from the configuration program. The module restart
in the standard mode with new settings.
The module is configured by the manufacturer to operate in the serial
port with the rate 9600 bit/s in the 8N1 mode, in “multipoint” mode and
group address 255.
Default module parameters can be restored without the use of the con-
figuration program. For this aim, one must press the SW1 push and hol-
ding it pressed for 6 seconds. After 6 seconds occure a quick extinction
and lighting of diodes, and the automatic module reset – what means the
charge of new parameters.
4.1. First start of the MR03 module
At the first start, the MR03 module requires the setting of following pa-
rameters: module working mode, signal power and channel number for
the radio transmission. Moreover, it is indispensable to set serial port
parameters: rates and transmission mode.
The added ECon program to the module set allows the user to configure
the MR03 radio module in an easy and simple way.