Technical data

QUICKTRONIC
®
Intelligent DALI DIM | Overview of dimmable control gears
12
2.4 The DALI interface – technical details
2.4.1 Simplifi ed installation
The DALI installation is carried out with commercial insta-
llation material for 230 V mains voltage. Both wires not
required in the case of fi ve-core cables (e.g. NYM 5 x
1.5 mm²) can be used for the DALI interface – without
taking the polarity into account. A separate bus line is
thus unnecessary! ECG and control unit can be operated
in different mains voltage phases.
2.4.2 Construction site operation
Switching the ECGs on or off (even without an installed/
programmed control unit) is possible at any time via the
fuse (basic DALI function). With brand-new ECGs, the light
is always turned on at 100 % luminous fl ux.
2.4.3 Advantages of DALI ECG with group assignment
Each ECG in the DALI system can be individually and digi-
tally addressed. Upon commissioning, each ECG is allocat-
ed the address and group membership. Each ECG can be-
long to up to 16 groups – including several groups at a
time. The ECGs can be addressed individually, in groups or
all together. The group assignment can be changed at any
time – without interfering in the wiring.
2.4.4 Integrated scene memory
Each ECG can save up to 16 light values, independent of
group memberships which may have been programmed.
Cross-fading between the scenes runs synchronously.
This means that all ECGs begin cross-fading onto the new
scene at the same time and they also end simultaneously
(by variation of the dimming speed).
2.4.5 ECG status report
The control unit can query the condition of each ECG.
Thus, for example, a lamp malfunction (or failure) or the
brightness of a lamp can be determined. The feedback ca-
pability of the OSRAM DALI ECG in connection with com-
plex bus systems (KNX, LON) is crucial in building manage-
ment systems (e. g.: the OSRAM DALI PRO screens lamp
malfunctions and can transmit them via a fl oating signal
contact; the OSRAM DALI magic (http://www.osram.com/
osram_com/tools-and-services/tools/dali-magic/index.jsp)
offers analysis using Wizard (software)).
2.4.6 Switching relay no longer necessary
The light is switched on and off via the interface. The
previously required external relay for switching can thus
be omitted.
2.4.7 Addressing is not a must
DALI can also be used without being addressed (groups or
individual addresses). The so-called “broadcast mode” is
used here, where all control gears are addressed together.
The IEC 62386 “digital addressable lighting interface”
(DALI) defi nes the digital communication between control
units and control gears (ECGs). The subsequent chapters
provide an overview of the most important properties of
the DALI interface. Detailed information can be found in
IEC 62386.
2.4.8 The DALI system principle
Each control unit works as the “master” and controls the
communication on the control line. In contrast, ECGs may
only answer as the “slave” upon request from the “master”.
DALI is based on the principle of a system of distributed in-
telligence: An intelligent control unit communicates with in-
telligent components. The control unit gives, for example,
only one command “Scene 1”, and the addressed ECGs
set the light value stored in their scene memory, whereby
the target value of all ECGs is reached simultaneously.
Cross-fade times as well as scene values are freely pro-
grammable.
2.4.9 The DALI topology
All DALI control gears and the control unit are connected in
parallel to the two-pole data line. The wiring can have a star
or tree confi guration; only ring confi gurations are not
allowed for wiring (marked by X in diagram 8). Termination
resistors on the communication line are not required.
DALI topology
max. 300 m
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