Switching/Dimming Actuators производства Siemens

DALI – simple and easy to manage

Digital Addressable Lighting Interface (DALI) was launched on the market in 2004 as a substitute for the classic 1 ... 10 V interface and is an interface definition for the control of up to 64 DALI devices, primarily ECGs, over a control device that acts as a master.

DALI communication enables the simultaneous control of all DALI devices using the same command (broadcast). In the event of control via broadcast, all DALI devices behave as if they are being mutually controlled over a 1 ... 10 V interface. As a second control option, DALI supports the assignment of a DALI device to one of up to 16 groups (group addressing).

DALI also allows the control of each DALI device individually (individual addressing). Individual addressing means that the control device can be interrogated for the failure of a lamp or ECG as well the switching status and current dimming value. This means that the operating state of each lamp group and even each lamp is constantly available to higher-level systems.

DALI supports assignment of DALI devices to a maximum of 16 scenes. The specific settings for each scene are stored in the individual DALI devices and can be called up by a single command. This allows even complex scenes or very fast command sequences to be called up. The cost of dimming with KNX and DALI is no higher than 1 ... 10 V.

Comparing the degree of cabling required for DALI and for 1 ... 10 V, and the difference in cost for material and labor, the cost of implementing a project with DALI is approx. a third cheaper than when using 1 ... 10 V.

In the simplest of cases, a control device for light control with DALI can comprise a brightness sensor, a presence detector or a combined brightness sensor/presence detector, which can control a group of lamps - depending on occupancy and daylight. With these simple local applications, where DALI is used by sensors as an interface to one or more DALI devices, the broadcast method is used instead of the classic control method over 1 ... 10 V. As such, these applications are not to be regarded as a networked system.

More high-performance control devices, such as the GE 141 EIB-DALI interface or the N141/02 KNX/DALI-Gateway from Siemens, tap into all the options offered by DALI.

Flexcon is another option for control of DALI devices. For further information see Chapter "Flexcon".

OSRAM DALI ECG meet the DALI standard. This makes a functionally equivalent exchange of the DALI ECG possible even after many years of service (investment security).

http://www.osram.com

For more information about DALI:

http://www.siemens.com/dali

Compare 1 ... 10 V controls to DALI

Wiring of lighting groups with 1 ... 10 V controls

Wiring of lighting groups with DALI via KNX

Advantages:

• Light groups are not hard-wired
• Separate planning of control cables and power supply
• Even load distribution in the power supply
• Lower fire load due to fewer cables
• Planning is easier and faster
• new: Integration of emergency lighting into the general lighting

Emergency lighting with central battery supply and KNX/DALI

Fault tolerant and simple to integrate:

• Fast switchover to safety lighting intensity inside of 100 ms
• Absence of reaction during emergency operation is guaranteed
• Automatic check for lamp operating readiness via a central program during normal operation

Simple solutions with KNX-DALI gateway
Normal operation Lighting control using DALI Feedback from error messages and lighting failures and ECG to building control		Emergency operation Automatic emergency lighting for DALI power failure Parameterization of the dimming value for DALI ECG during emergency lighting is done via KNX/DALI gateway
Intelligent solution with KNX-DALI gateway and status message during emergency operation
Emergency operation Lighting control using DALI Feedback from error messages and lighting failures and ECG to building control		Emergency operation Automatic emergency lighting according to parameterization via KNX Detection of emergency operation, also by the number of failing DALI ECG Status messages are possible in emergency operation
Emergency lighting with KNX-DALI gateway single battery
Normal operation		Emergency operation
Lighting control using DALI Initiation/detection of single battery tests		Automatic emergency lighting according to parameterization via KNX