KNX DaliControl e64 – intelligent light control

Customised individual lighting is one of the most important tasks of modern buildings. Our DaliControl e64 perfectly combines KNX installation technology with DALI lighting standards. In addition to comfortable switch and dim functions, the DaliControl e64 can also be used to control emergency lighting and to display the operating hours and lifespan of different lights. Many other applications and functions are also possible. Our most recent development for the DaliControl e64 is the implementation of the new Dali standard DT8.

DALI technology

Dali_LogoThe cross-functional DALI-Bus (DALI = Digital Addressable Lighting Interface) is a system used to control electronic ballasts (ECGs) in lighting technology. The specifications of the DALI communications interface are set in the international norm EN62386. Just like the KNX protocol, the DALI protocol is standardised. The DALI Association DiiA based in the United States is the organisation that defines and maintains DALI standards.

Individual lights and groups

gc16Traditionally, a DALI Master controls one DALI segment. A DALI segment consists of up to 64 DALI lights which can be switched and dimmed in up to 16 groups.


Installation systems

GatewayIn installation systems where DALI lights are controlled via the KNX installation, the DALI-KNX interface constitutes the DALI Master. Like the KNX bus, the DALI bus is also a two-wire bus, which makes the DALI installation very easy.

DALI Installation

Electrical_connectionThe wiring consists of a 5–core cable (typically 5×1,5 m² NYM), which connects all 64 lamps in parallel. 3 cores, L, N and PE, are used for the energy supply and the remaining 2 cores are used for the DALI bus.

Lamp/ECG errors

A major advantage of DALI technology as opposed to KNX lighting control is the reporting and acknowledgement of lamp or ECG errors by the DALI system. This information is of vital importance for operational safety and lighting management.


DALI device types define the specific features and attributes of different lights. The following are some of the most common DALI device types:

dt-0DT-0 This device type is for fluorescent lights


dt-1DT-1 is the specification for safety lighting


dt-4DT-4 is the device type for low voltage halogen lamps


dt-6DT-6 describes the control of LED lights


dt-8DT-8 is the specification for different colour control processes



For color control in DALI systems the following definitions for color description are important:

RGBWAF colour channels

With this type of colour control, the colour perception is based on the additive mixing of the basic colours red, green and blue. In theory, the overlapping of these colours results in the colour perception “white“. In practical terms, however, it is very difficult to create a pure white tone. For this reason an additional channel for white colour can be added (RGBW). According to DALI standard EN 62386-209, up to 6 channels (RGBWAF) can be used for colour perception in this model. In practice, three independent channels for driving the lights in red, green and blue and a channel for the color white are used. In connection with the KNX, many different colours can be easily achieved through different mixing ratios.


HSV colour control

An alternative to the RGBW colour space is colour definition based on hue (H), saturation (S) and brightness values (V). This type of colour definition is often preferred for the artistic aspects of colour perception and is technically possible with only 3 objects. The colour tone is set as a value between 0° and 360°, therefore reaching all colours in the colour circle. The values for saturation and intensity (dark phase) are entered between 0 and 100%.


Tunable White

2Over thousands of years the human organism has become accustomed to a repetitive daily cycle: At night it is dark and thus the time for our organism to relax and regenerate through sleep so that we have new energy for the following day. In the morning when the sun rises and the light has a warm tone, we get up and get ready for the day. When the sun is at its zenith around midday, the colour temperature cools down. Once the sun starts moving back towards the horizon in the afternoon, the colour temperature starts to rise again. Research has shown that the human organism functions best if it is exposed to the natural colour temperature of the specific time of day. With rapidly developing LED technology it is now possible to replicate the cyclical change of light colour temperature in the rooms in which we live and work. The very small LED format makes it possible to integrate two different LED types, cool white and warm white, into one casing, thereby giving the impression that a lamp emits two colour temperatures. In connection with a DALI ECG those two colour temperatures are mixed dynamically. This means that almost any colour temperature can be set within a defined range between e.g. 2500 and 4500 Kelvin, simply by transmitting one information, the desired colour temperature, to the DALI ECG.


x/y Colour Space

1Another way of describing a colour is by defining a 3-dimensional colour space. In this colour space the following formula applies: x+y+z=1. A simple conversion shows that x+y =1-z. So if x and y are known, z can be easily calculated. A vector can point anywhere in the colour space and thereby define the colour. By having to define only the coordinates x and y, only two pieces of information are required to describe a colour. The light control processes via colour temperature (Tunable White), RGBW and the coordinates x/y have all been defined by the DIIA in the new data point type 8. In practical terms, the DALI DT-8 reduces the number of required light control channels to a minimum thereby also reducing costs. Easy installation, low costs per light channel and the numerous and complex options to create customised light settings based on colour, brightness and intensity are amongst the most important reasons in favour of using DALI in lighting technology.


The DIN rail mounted device is only 4 horizontal pitches (HP) wide and is connected to the KNX bus via a KNX bus connector. The device also requires a 230 V power supply voltage. The DALI bus, which can communicate with up to 64 DALI lights, is connected via two screw terminals.

Standard application

64 Dali ECGs in 16 groups can be controlled with the DaliControl e64. The device is also suitable for the control of single ECGs. The DaliControl e64 provides information about operating hours, lamp and ECG faults as well as the binary and value status. Additional functions are: Calculation of maintenance intervals, failure rates and simple ECG exchange.


The new DaliControl e64 supports the Dali standard DT8. This means the DaliControl e64 is one of the very few KNX/Dali gateways that are able to control “Tunable White”, the new generation of light sources. With “tunable white” lamps, the colour temperature of a light is adapted to a person’s best possible feeling of well-being. New scientific findings show that the well-being and performance of a person in a room changes over the course of a day under the influence of colour temperature. These natural swings and fluctuations can be compensated for by the timely adjustment of colour temperature in artificial lights. The market therefore offers a new generation of light sources called “tunable white”. To control these lights, Dali technology has defined the Dali standard DT8 which has been implemented in our new DaliControl e64. An intuitively operated scheduling programming can now be used to set the desired colour temperature based on the time of day.

Of course, RGBW lights can be controlled both via the xy-colour space and via the respective colour temperature. Typical application scenarios are:

– Emulating the natural course of daylight
– Greater feeling of wellbeing
– Better concentration

Production areas:
– Emulating the natural course of daylight
– Greater efficiency

Hospitals / health centres:
– Emulating the natural course of daylight
– Greater feeling of well-being and faster recovery process
– Therapeutic use of the light

Schools, universities and training institutions:
– Emulating the natural course of daylight
– Better concentration

Supermarkets, department stores and shops:
– Product specific lighting
– Seasonal lighting
– Better product display

Lighting management in connection with the IPAS visualisation system ComBridge Studio Evolution

A specific application results from the IP interface in the DaliControl e64 in connection with ComBridge Studio Evolution. If you need to know all the information the DaliControl e64 is able to provide, you quickly accumulate over 500 objects per DaliControl e64 and often more than one DaliControl e64 gateways are required for a project. If you want to transmit all this information via the KNX bus, the increased bus load can easily interfere with the communication.

The ComBridge Studio Evolution Dali Management Tool has been specifically developed to read the large amount of management information directly from the DaliControls e64 via IP and to store it in the internal database. This means that the higher demands place on lighting management can be easily displayed without a negative impact on the stability of the installation bus system. Moreover, our template concept enables an extremely time-efficient configuration. The following comparison shows the advantages:

10 KNX objects per ECG make 640 objects per gateway (without switch functions). If 30 DaliControl e64 devices are used, this can result in around 30,000 data points taking into consideration that not all information may be required. If you want to display the information in the visualisation system assuming that per data point 2 minutes are required for the configuration, 500 hours will be needed just for the display of every status alone. Assuming it also takes 2 minutes to configure an IP address, the duration is reduced to one single hour if you use the ComBridge Studio Evolution Dali Management Tool. Only the IP address of the DaliControl e64 has to be configured and all information is immediately available in the visualisation system CBSER.

The DALI Management Tool also makes it possible to analyse the test results for battery operated emergency lighting. The DaliControl e64 carries out lamp, battery and function tests according to requirements. The CBSE Dali Management Tool stores the results in its own database so that they can be downloaded as a report at any time. This makes the combination of DaliControl e64 and CBS DaliManagent Tool the perfect solution for battery-operated emergency lighting systems.

DaliControl e64 Order-Nr. Request
KNX DALI Gateway – 4 unit plastic casing for DIN Rail mounting. Control of 64 ECGs or operating resources for emergency lights, integrated power supply, individual control of ECGs or control of ECGS in up to 16 groups. Flexible commissioning concept: directly via buttons and device display or via integrated web server. Scenes and effect module with 16 light scenes and 16 effects. Connector: 110 -250V AC/DC, network, KNX. 4101-145-01 icon-anfrage
Name Size* Version
Documents APB 4.3 V1.3-Rev.2.3
BMA 0.4 V1.1
INF 0.3 V1.3.5

Software ETS APC 1.3 V1.3.3
Upgrade-Tool 0.5 V1.3.6

Catalogues DaliControl 3 V1.0-2018
Main 11 V1.0-2018

* all figures in MB