Correspondance lampes-appareillages
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DALI
- Addressing of DALI ECGs
- Bus system
- Control and mains line
- Control line – Length
- Control line – cross-section
- Control lines
- Control unit
- Control units of various manufacturers
- DALI ECGs of various manufacturers
- DALI devices
- Data storage
- Developement restrictions
- Difference of DSI and DALI
- Event of a fault
- Feedback
- Group assignments
- Insulation
- Leuchtengruppenebenen
- Missing DALI voltage
- Polarity
- Power outage
Addressing of DALI ECGs
Question
How are DALI ECGs addressed?
Answer
DALI ECGs can be addressed individually, in groups or all together.
Bus system
Question
Is DALI a new digital installation bus system?
Answer
No! DALI is simply a new digital communication standard for lighting systems. It fills the gap between previous 1...10 V technology and complex bus systems.
For more information, please visit our page: What is DALI
Control and mains line
Question
Can control and power cables be laid together?
Answer
Yes, a 5x1.5 mm2 NYM cable can be used for example.
For more information, please visit our page What is DALI
Control line – Length
Question
Is there a limit, and if yes, what is the maximum length of the DALI control line?
Answer
The length of the control line is limited only by the drop in voltage.
The maximum line length between the DALI control unit and the furthest DALI control gear is 300 m.
Control line – cross-section
Question
What cross-section do you recommend for the control line?
Answer
- 0.5 mm2 minimum if cable length is up to 100 m
- 1.0 mm2 minimum if cable length is from 100 m to 150 m
- 1.5 mm2.minimum if cable length is up to 300 m
Control lines
Question
Can existing 1...10 V control lines be used?
Answer
Yes, provided they are rated for mains voltage and have the required minimum cross-section.
Control unit
Question
Was passiert, wenn ein Steuergerät defekt ist?
Answer
Durch Kappen der Steuerleitung können alle EVG eingeschaltet werden.
Control units of various manufacturers
Question
Can control units of various manufacturers be combined in one installation?
Answer
Not at all. DALI ECGs are interchangeable but control components normally cannot be combined.
DALI ECGs of various manufacturers
Question
Can DALI ECGs of various manufacturers be operated in one installation?
Answer
Yes, they can. DALI is a standard developed by the lighting industry. ECGs carrying the DALI logo are compatible.They may differ in quality, such as different lamp starting times and dimming ranges..
DALI devices
Question
Will there be more DALI devices in the future?
Answer
Absolutely. For example for LED or low-voltage halogen lamps.
Data storage
Question
Where is the data for group assignments and scene light values stored?
Answer
Directly in the ECG.
Developement restrictions
Question
Who is allowed to develop a DALI control unit or DALI ECGs?
Answer
There are no restrictions, except that the DALI logo may only be used by members of the DALI Activity Group (www.dali-ag.org).
Difference of DSI and DALI
Question
What's the difference between DSI and DALI?
Answer
DSI is a corporate solution and not a general standard like DALI.
DSI does not allow addressing, it is therefore not possible to form groups freely or check individual lamps for faults.
Groups have to be formed by wiring, like applications with 1...10 V.
Event of a fault
Question
What happens in a case of ECG failure?
Answer
The ECG has to be replaced and its parameters have to be set up again, depending on the control unit.
Feedback
Question
Is it possible to receive feedback messages from DALI ECGs?
Answer
Yes, you can check all the device settings and the device status, such as lamp faults.
Group assignments
Question
Do you have to take into account the group assignment with DALI when wiring up the system?
Answer
No, the groups are generally assigned (addressed) when the system is started up.
Insulation
Question
What insulation is required for the DALI control line?
Answer
The same as for 1...10 V: The control line must be approved for mains voltage.
It is allowed to lay the control line of 1...10-V- or DALI- together with the mains line, as e.g. in a NYM cable.
An additional insulation in a typical luminaire of protection class I is not necessary.
Leuchtengruppenebenen
Question
Können mit DALI verschiedene Leuchtengruppenebenen benutzt werden?
Answer
Ja, es können für verschiedene Anwendungen auch verschiedene Gruppenebenen geschaffen werden. Z.B. für eine Anwendung sind die Gruppen parallel zum Fenster angeordnet, für die zweite Anwendung rechtwinkelig zum Fenster.
Missing DALI voltage
Question
What happens if a control unit is faulty?
Answer
If the DALI interface voltage is lost, all the ECGs will go to the "System Failure Level". This depends on the control unit used (ECG factory setting: 100 % light).
Polarity
Question
Does the polarity of the DALI control line need to be taken into consideration when connecting the control gear?
Answer
Generally yes, but when using OSRAM DALI control gears there is no need to worry about polarity.
Power outage
Question
Is the data lost in the ECG in case of a power failure?
Answer
No, the data is permanently stored in the ECG. It is retained even after a lengthy power outage.
