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DALI / Digital Addressable Lighting Interface
Is a two-way standard interface where the information is transmitted
from the controller to the lighting equipment which carry out all
commands and information requests received.
This system allows us to accomplish an appropriate management of
the architectural illumination. It can be incorporated as a subsystem
into current protocols regarding building control systems.
It enables the creation of up to 16 different settings for the total
control of the building. It also emits alerts regarding malfunctions of
the luminaires, giving us total control of the installation. This means
we are aware at all times of any potential problems.
The transmission of digital signals is made by means of a two-wired
control line (bus), where there is a data transmission rate of 1.2 Kb/s.
The DALI system has a logarithmic curve which is adjustable to the
sensitivity of the human eye, defined by the international regulation
IEC 62386. Additionally, the compatibility with different brand models
of ballasts is also covered by this international regulation.
DMX512 Program Code
DMX (digital Multiplex) is an electronic protocol used in lighting
engineering for monitoring and controlling the illumination of closed
or limited spaces. It also used in architectural lighting applications,
where we require multimedia on building facades.
The DMX512 uses channels for the command transmissions to the
different equipment installed. The transfer of information is carried out
via 3 or 5 pin wires, with a data transmission rate greater than 250
Kb/s. Since signals are not bidirectional (like DALI system) we cannot
verify any of the commands as they are not sent back to any screen.
In order to prevent any potential interference during transmission, all
DMX512 wires must be kept apart from the rest of electric cables and
signal repeaters.
The DMX holds a limited quantity of 512 channels. Each channel
controls a specific parametre or special effect, which can be
controlled with software (PC) or with a mixing console. What’s more,
this can be linked up between devices by means of a splitter or a
cascade formation.
Intensity adjustments 1-10V
This adjusting system is based on the variation of the continuous
current of electricity which, allows us to modify the levels of light
emission from 1 to 100 % via an analogical signal.
Therefore, light emissions which are being controlled have scaled
output ratings, with 10V being the value corresponding to a 100%
light intensity and 0V the lowest level of light intensity.
This system permits us to dim the levels of light emission. An ON/
OFF switch is found in the power supply line. As this is an analogic
product, it cannot be consequently modified via software, meaning
that the group setting must be carried out through cables instead.
System control
DMX DIGITAL MULTIPLEX
