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& User manual KNX interface

V 0.1

Latest Update: August 2012 All software-related descriptions refer to the V1279 software. An update is recommended for older versions of the system. Small deviations of the descriptions are possible and due to changes in the software. All brands and logos are registered trademarks and are the property of the respective holders of the rights Copyright All rights reserved. No parts of this document may be reproduced or transmitted in any form by any means, electronic or mechanical, without the prior written authorization of its legal owner. If this publication is made available on Ekon GmbH media, Ekon gives its consent to downloading and printing copies of the content provided in this file only for private use and not for redistribution. No part of this publication may be modified, altered or used for commercial purposes. Ekon GmbH is not liable for the damages which arise from the use of an illegal modified or altered publication.

All products correspond to the directly applicable EU regulations and guidelines. 2

Table of Content

1. Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Application fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. Application example - sensors on KNX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 3

1. Electrical connection KNX interface The KNX/EIB interface is a serial interface for the EIB system with integrated 2-wire bus coupler. KNX/ EIB devices can be connected to the myGEKKO by means of this interface. Technical data Voltage supply EIB bus coupler Included in the delivery Dimensions L x H x D

+5 VDC Integrated Power supply 92 x 26 x 67 mm

The KNX interface is connected to the myGEKKO using the included RS232 cable. The baud rate is to be set to 38.400 baud.

Connection to the myGEKKO Touch. The KNX interface is connected to an RS232 interface. The KNX interface can be connected to either a free interface directly on the myGEKKO Touch or the interface distributor USB/quadruple RS232 (art. nr. ACC-RS201). A maximum of 5 interfaces are available on a myGEKKO Touch with distributor.


Connection via

Interface COM 1



with USB interface distributor

2. Application fields Reduction of wiring – sensors on KNX Using KNX sensors, it is possible to reduce the wiring. You can determine if you should use traditional sensors, sensors in star topology or KNX sensors with a simple cost-benefit evaluation.

Sensors on KNX Actuators on RIO, WAGO or KNX

myGEKKO as interface - KNX connected to external systems myGEKKO can be considered as a higher-level interface, in which all software modules for the external systems are already integrated. No programming skills are required for the connection of the external systems. The assignments are carried out directly via the touch display. Thanks to myGEKKO, also existing KNX systems can be visualised and easily interlinked to external systems such as Modbus, Enocean, Telenot, heating systems, Multiroom Audio, LAN, etc. Furthermore, with myGEKKO scenarios, timers and links can be generated by the final customer himself, which is only partially possible with KNX, or only with the aid of the ETS.

Existing KNX system (sensors & actuators)


lan/ethernet 5

3. 3. Application example - sensors on KNX The following example uses KNX sensors for push-buttons and room sensors. The actuators are controlled via Modbus (RIO/WAGO). All group telegrams are processed by the myGEKKO and forwarded to the appropriate actuators.

0101010101 0101010101

Sensors on KNX Actuators on Modbus (RIO/WAGO)

Requirements for the KNX application of the devices Push-buttons and binary inputs It is possible to use any desired KNX push-button, BA switch or binary input. The one important thing is that the application is able to fulfill the following requirements: Command on Pressed -> Sending an ON telegram (DPT 1) Command on Release -> Sending an OFF telegram (DPT 1) CAUTION! Older versions of the BA switches don’t support this function. Example devices: Universal interface JUNG mod. 2076-2T and 2076-4T 1-way BA switch JUNG mod. 2071.01 LED (not all JUNG BA switches fulfill the requirements) Push-buttons JUNG mod. 3094 TSM

Temperature measurement It is possible to use any desired KNX object controller, room controller or single-room controller. The devices must only be able to send the actual temperature; the temperature itself has to be readable. Valves, fans etc. are connected directly to the RIO/WAGO modules. The regulation is managed by the myGEKKO itself. This means that it is possible to install simple and cheap object controllers in the room. The requirement for this application is: The actual temperature must be readable (DPT 9)


Example devices: Room controller JUNG mod. 4093 KRM TSD For example, the room controller can be programmed in order to show the actual temperature inside the room and to allow the use of the push-buttons as switches. The operating modes of the singleroom control are defined on the myGEKKO Touch, the room controller is only used as temperature sensor.

Programming of group addresses via ETS myGEKKO supports 3-level group addresses (e.g. 5/2/54). 2-level group addresses are not supported (e.g. 7/128). 1. Every object of the KNX devices which has to be used contains a group address. The ETS only allocates the group addresses, it does NOT create any connection between the devices. 2. The programming of the devices takes place via Programming of group addresses via ETS ETS. The group addresses are defined only once and don’t need to be modified in practice, because all function links are created via myGEKKO.

Activation of the KNX interface on the myGEKKO 1. In the main settings, change to the IO configuration (blue/green arrows) 2. In the IO Station 5-8, it is possible to assign the KNX interface and the connected port (e.g. COM Port 1 if the interface is connected directly to the myGEKKO Touch) 3. With the push-button Configuration >> it is possible to activate a test mode, which works as a group telegram, in order to check if the telegrams are received. 4. Now the interface can be used in the system menu.

Activation of the KNX interface on the myGEKKO


Group-address assignment on the myGEKKO Touch When all the KNX devices are programmed with group addresses and the interface has been activated on the myGEKKO, it is possible to assign the systems. The following example describes the assignment of one light and a single-room controller. The connection of WAGO or RIO modules to the myGEKKO is not described in this manual. You can find further information on this topic on

A simple lighting circle 1. 2. 3. 4.

Log in as configurator and change to the system menu -> Lights. Select a free lighting circle and change to the IO level (blue/green arrows). Enter the name of the lighting circle tapping the green bar on top. Under “Switch ON” and under “Switch OFF” enter the KNX group address of the switch. Caution: you have to enter also the data type DPT 1..3. 5. Under “Switching output” enter the appropriate RIO/WAGO switching output. 6. Done! Now you can control the light via display or using the KNX switch.

KNX group address assignment

IO test via assignment window


RIO switching output assignment

Light control via display

Single-room control 1. 2. 3. 4.

Log in as configurator and change to the system menu -> Heating. Select a free controller and change to the IO level (blue/green arrows). Enter the name of the controller tapping the green bar on top. Under “Sensors -> Temperature” enter the KNX group address of sensor’s current value . Caution: you have to enter also the data type DPT 9. 5. Under “Control -> Valve1” enter the appropriate RIO/WAGO switching output. 6. Done! Now the single-room controller is ready to be used.

KNX temperature value assignment

Main window of the single-room controller

Conclusions: With myGEKKO you can easily assign the KNX group addresses to any desired function. The KNX group addresses can be homogeneously linked on the same level, just as RIO, WAGO, ENOCEAN, TELNET, DALI addresses etc. The connections can be created directly on the Touch Display or in remote mode via LAN. The functional changes required by the final customer can easily be carried out through remote access if the customer doesn’t want to do it himself, or together with the customer by phone. You can reproduce and adjust the myGEKKO system of the customer with a 1:1 scale on the myGEKKO Touch in your office, and eventually send the customer the modified backup file via email.





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User manual KNX interface