Acclaim Lighting DDC-1-AC, User Manual

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DALI DMX
1 2 3 4 5 6 7 8 9 10 11 12
ON
DMX ADDRESS SETTING
DALI
PSU
DMX
Controller
DALI
Fixture
DALI
Fixture
DALI
Fixture
DALI
Fixture
DALI
Fixture
DALI
Fixture
TIPS FOR ACHIEVING SUCCESSFUL DALI CONTROL
•
Do not exceed a total of 64 devices/fixtures.
•
Many types of suitably insulated two-core cables (with a recommended gauge of 16 AWG
/ 1.5mm
2 ) can be used to transmit DALI signals.
•
Do not exceed a total cable length of 984 ft (300m).
•
If a cable with a cross sectional area of less than 16 AWG / 1.5mm
2
is used, the maximum
length may need to be reduced in order to avoid a voltage drop of greater than 2V. A 20
AWG / 0.75mm
2 cable would reduce the maximum length to roughly 492 ft (150m) while
a cable with a cross sectional area of 22 AWG / 0.5mm
2
would limit the maximum length
to less than 328 ft (100m).
•
Thanks to the slow bit rate and ELV categorization, DALI cables can be run alongside
mains supply cables without issue.
•
DALI devices can be arranged in linear or star configurations - or even mixtures of the two.
•
DALI connections are polarity independent; each DALI device is protected by an internal
bridge rectifier.
•
A power supply must be present somewhere along the DALI bus. The power supply
should provide an output of 16V and must be regulated to a maximum current output of
250mA. It is best to situate the power supply towards the middle of long runs in order to
minimise voltage drops. The voltage drop must not exceed 2V at any point.
DALI
Fixture
DALI
Fixture
DALI
PSU
DALI
Fixture
DALI DMX
1 2 3 4 5 6 7 8 9 10 11 12
ON
DMX ADDRESS SETTING
DMX
Controller
DALI LAYOUT
The DALI standard offers a great deal of flexibility in its layout; standard 2-core cabling is
used and up to 64 fixtures can be arranged in a variety of topologies, including a linear bus,
a star, or a mixture of both. No termination is used anywhere in the layout and the polarity of
the 2-wire connections are unimportant.
A simple DALI bus layout
A DALI star layout