MDT Technologies RF-LK001.03 User manual
State 08/2023 - Version 1.0
Technical Manual
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
KNX RF+ Line Coupler
RF-LK001.03
Further Documents:
Datasheet:
https://www.mdt.de/EN_Downloads_Datasheets.html
Assembly and Operation Instructions:
https://www.mdt.de/EN_Downloads_Instructions.html
Solution Proposals for MDT products:
https://www.mdt.de/en/for-professionals/tips-tricks.html
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
Content
2 Overview...........................................................................................................................................3
2.1 Overview devices.....................................................................................................................................3
2.2 Functions .................................................................................................................................................4
2.3 Connection diagram ................................................................................................................................4
2.4 Structure & Handling...............................................................................................................................5
2.5 Commissioning........................................................................................................................................5
3 ETS Parameter ..................................................................................................................................6
3.1 Main line (KNX TP)...................................................................................................................................6
3.2 Line (KNX RF)...........................................................................................................................................8
4 Settings in the ETS............................................................................................................................9
4.1 Structure of a project ..............................................................................................................................9
4.1.1 Topology with separate RF line ........................................................................................................9
4.1.2 Topology with segment coupler .....................................................................................................10
4.2 Telegram routing ...................................................................................................................................11
4.3 Filter table .............................................................................................................................................11
4.4 Preview lter table ................................................................................................................................12
4.5 Procedure for commissioning ...............................................................................................................12
5 Index ..............................................................................................................................................13
5.1 Register of illustrations .........................................................................................................................13
5.2 List of tables ..........................................................................................................................................13
6 Appendix ........................................................................................................................................14
6.1 Statutory requirements.........................................................................................................................14
6.2 Disposal .................................................................................................................................................14
6.3 Assembly ...............................................................................................................................................14
6.4 History ...................................................................................................................................................14
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
2.2 Functions
Line coupler
The device is used to connect devices on an RF radio line with devices on a TP (twisted pair) line. The bus
load can be reduced via a lter table.
Segment coupler functionality (from ETS 6)
The new segment coupler function is a software extension of a line coupler that connects line segments
independently of the media type. This means that a KNX RF line coupler can be integrated into a twisted
pair line without having to create a separate structure.
Long Frame Support
The device supports “Long Frames” (longer telegrams). These contain more user data per telegram, which
signicantly reduces the programming time with the ETS.
2.3 Connection diagram
The following picture shows the exemplary connection diagram for a RF+ Line Coupler:
Figure 1: Exemplary connection diagram
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
2.4 Structure & Handling
The following pictures show the structure of the device:
Figure 2: Structure & Handling
1 = Bus connecting terminal, Connection to main line (TP)
2 = Programming button
3 = Red programming LED
4 = Antenna, radio transmission to line (KNX RF)
2.5 Commissioning
1. Wire the device according to the connection diagram.
2. Connect interface to the bus, e.g. MDT USB Interface.
3. Switch on bus voltage.
4. Press the programming button on the device (red programming LED lights up continuously).
5. Set and programme the individual address in the ETS. (Programming LED turns off)
6. Congure and programme the settings in the application programme.
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
3 ETS Parameter
3.1 Main line (KNX TP)
The following table shows the available settings:
ETS Text Dynamic range
[Default value] Comment
Telegram routing ■ Groups: lter; Physical: block
■ Groups and Physical: lter
■ Groups: route; Physical: lter
■ Groups and Physical: route
■ individual setting
■ block: No telegram is forwarded.
■ lter: Only telegrams from the lter
table are forwarded.
■ route: All telegrams are forwarded.
■ individual setting: The following
parameters can be set individually.
Group telegrams:
Main group 0…13
■ route all (not recommended)
■ block
■ lter
■ All group telegrams (main group
0...13) are forwarded.
■ No group telegram (main group
0...13) is forwarded.
■ Only group telegrams (main group
0...13) from the lter table are
forwarded.
Group telegrams:
Main group 14…31
■ route all (not recommended)
■ block
■ lter
■ All group telegrams (main group
14...31) are forwarded.
■ No group telegram (main group
14...31) is forwarded.
■ Only group telegrams (main group
14...31) from the lter table are
forwarded.
Physical telegrams ■ route all (not recommended)
■ block
■ lter
■ All physical telegrams are forwarded.
■ All physical telegrams are blocked.
■ Only physical telegrams
corresponding to the lter table are
forwarded.
Physical telegrams:
Repetition for errors on the
main line
■ not active
■ up to 3 repetitions
■ only one repetition
In case of transmission errors (e.g. due
to missing receiver) on the main line,
physical telegrams are...
■ not sent repeatedly.
■ sent up to three times repeatedly.
■ sent once repeatedly.
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
ETS Text Dynamic range
[Default value] Comment
Group telegrams:
Repetition for errors on the
main line.
■ not active
■ up to 3 repetitions
■ only one repetition
In case of transmission errors (e.g. due
to missing receiver) on the main line,
group telegrams are...
■ not sent repeatedly.
■ sent up to three times repeatedly.
■ sent once repeatedly.
Conrm telegrams on main
line
■ if routed
■ always
■ Forwarded telegrams on RF line are
conrmed by an “ACK” on the main
line.
■ Each telegram on the main line is
conrmed by an “ACK”.
Conrm own telegrams ■ active
■ not active
■ Telegrams sent to the main line are
conrmed by an additional “ACK”.
■ No conrmation by an “ACK”.
Table 1: Settings – Main line (KNX TP)
Note: The setting “route all” for group and physical telegrams is only intended for test purposes. The
setting in normal operation is not recommended.
For more information on “Group telegrams” and “Physical telegrams”, see 4.2 Telegram routing
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
3.2 Line (KNX RF)
The following table shows the available settings:
ETS Text Dynamic range
[Default value] Comment
Programming via
Line (KNX RF)
■ allow
■ block
Setting whether the programming of the
device is also possible via the RF line.
Telegram routing ■ Groups: lter; Physical: block
■ Groups and Physical: lter
■ Groups: route; Physical: lter
■ Groups and Physical: route
■ individual setting
■ block: No telegram is forwarded.
■ lter: Only telegrams from the lter
table are forwarded.
■ route: All telegrams are forwarded.
■ individual setting: The following
parameters can be set individually.
Group telegrams:
Main group 0…13
■ route all (not recommended)
■ block
■ lter
■ All group telegrams (main group
0...13) are forwarded.
■ No group telegram (main group
0...13) is forwarded.
■ Only group telegrams (main group
0...13) from the lter table are
forwarded.
Group telegrams:
Main group 14…31
■ route all (not recommended)
■ block
■ lter
■ All group telegrams (main group
14...31) are forwarded.
■ No group telegram (main group
14...31) is forwarded.
■ Only group telegrams (main group
14...31) from the lter table are
forwarded.
Physical telegrams ■ route all (not recommended)
■ block
■ lter
■ All physical telegrams are forwarded.
■ All physical telegrams are blocked.
■ Only physical telegrams
corresponding to the lter table are
forwarded.
Table 2: Settings – Line (KNX RF)
Note: The setting “route all” for group and physical telegrams is only intended for test purposes. The
setting in normal operation is not recommended.
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
4 Settings in the ETS
4.1 Structure of a project
4.1.1 Topology with separate RF line
From ETS 5:
The project is set up identically to projects with twisted pair (abbreviated as “TP” in the following) line
couplers, except that each connection from radio (abbreviated as “RF” in the following) to TP must be
implemented via the RF-LK001.03 line coupler. A radio line is generated in the medium “RF”. Here, too,
the RF line coupler has the address “x.0”.
The following picture shows the exemplary structure of a topology:
Figure 3: Example – Topology with RF Line
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
4.1.2 Topology with segment coupler
ETS 6:
With ETS 6 (from version 6.0.5), the RF line coupler can be used as a segment coupler. This is a software-
side extension that connects line segments independently of the media type. This means that a KNX RF
line coupler can be integrated into a TP line without having to create a separate structure for it.
The following picture shows the exemplary structure of a topology:
Figure 4: Example – Topology with segment coupler
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
Note:
■ There may only ever be one segment coupler in an RF segment.
■ In the ETS, it is not possible to create manual lter table entries for RF segments. This means that no
additional group addresses can be added to the automatically created lter tables for subordinate
segments.
4.2 Telegram routing
A distinction is made between two types of telegrams:
■ Telegrams with physical address
■ Telegrams with group addresses
Addressing with individual addresses is used for programming, for example, while addressing with group
addresses is used for “normal” bus communication.
The behaviour of the line coupler with physical addresses is relatively simple. If the destination address is
in the line of the line coupler, the telegram is forwarded, otherwise it is not.
The behaviour of telegrams with group addresses is dened by the use of lter tables. The lter tables
specify which group addresses are transmitted from TP to RF and vice versa by the line coupler.
The line coupler listens to all group telegrams on both the TP and RF sides and compares the target
address of the telegram with the group addresses in the lter table. If the target address is in the lter
table, the telegram is converted to the other medium. If the destination address is not in the lter table,
the line coupler does not forward the telegram.
4.3 Filter table
The lter table is created automatically by the ETS. However, there are exceptions where it may be useful
to add group addresses manually to the lter table.
Each group address that contains communication objects of TP devices and devices that belong to the RF
line of the line coupler are automatically added to the lter table by the ETS. This means that all group
addresses required for proper communication are already present in the lter table. However, as
mentioned at the beginning of this chapter, it can sometimes be useful to add group addresses to the lter
table manually, e.g. if a visualisation is to display the behaviour of certain group addresses or if group
addresses are to be made visible for diagnosis in the group/bus monitor.
To add the group address manually, the group address is selected in the ETS and the item “Pass through
line coupler” is set from “No” to “Yes”:
When manually adding group addresses to the lter table, however, please note that the group addresses
can now pass through all line couplers and this increases the bus load on all lines. Therefore, only group
addresses that are really needed should be added to the lter table.
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
4.4 Preview lter table
To do this, right-click on the respective line coupler. In the context menu that opens, the entry “Preview
Filter Table” can now be selected. The lter table shows all group addresses that are transferred from the
RF line to the TP line – and vice versa.
4.5 Procedure for commissioning
After all devices have been inserted according to the corresponding topology, the devices can be
congured according to the user’s own requirements.
The correct procedure is particularly important during commissioning, as this is the only way to ensure
data exchange between wired transmission and radio transmission:
■ Programming the line coupler
By programming the line coupler, the current settings are loaded into the line coupler. Furthermore,
the current lter table is loaded into the line coupler.
■ Programming the other RF devices
When programming the KNX RF devices, the parameter settings are loaded into the device. This
process is analogous to all TP devices. Furthermore, the programming process of the RF devices writes
the domain address into the device. This address is unique for each RF line and ensures that all RF
devices of a line can communicate with each other, but that the line cannot be influenced by any
device outside the line.
Important: Whenever the project is changed, the line coupler must rst be reprogrammed (application
programme). Then all devices affected by the change must be reprogrammed.
If changes are made to the topology of the project, the line coupler must be reprogrammed rst and then
all devices affected by the change in topology.
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
5 Index
5.1 Register of illustrations
5.2 List of tables
Figure 1: Exemplary connection diagram ..........................................................................................................4
Figure 2: Structure & Handling...........................................................................................................................5
Figure 3: Example – Topology with RF Line.......................................................................................................9
Figure 4: Example – Topology with segment coupler .....................................................................................10
Table 1: Settings – Main line (KNX TP)...............................................................................................................7
Table 2: Settings – Line (KNX RF).......................................................................................................................8
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Technical Manual
KNX RF+ Line Coupler [RF-LK001.03]
State 08/2023 - Version 1.0
6 Appendix
6.1 Statutory requirements
The devices described above must not be used in conjunction with devices which directly or indirectly
serve human, health, or life-safety purposes. Furthermore, the devices described must not be used if their
use may cause danger to people, animals, or property.
Do not leave the packaging material carelessly lying around. Plastic foils/ bags etc. can become a danger-
ous toy for children.
6.2 Disposal
Do not dispose of the old devices in the household waste. The device contains electrical components that
must be disposed of as electronic waste. The housing is made of recyclable plastic.
6.3 Assembly
Danger to life from electric current!
The device may only be installed and connected by qualied electricians. Observe the country-specic
regulations and the applicable KNX guidelines
The units are approved for operation in the EU and bear the CE mark.
Use in the USA and Canada is not permitted!
6.4 History
V1.0 First Version of Technical Manual DB V2.0 08/2023
Table of contents
