CT p44-45 Tridonic Dec08.qxp 20/11/2008 16:04 Page 45
UIforwardLighting ManagementUIback
gives modern lighting management occupancy patterns.
systems a high level of functionality at the In most cases this arrangement will
‘business end’ of the lighting also include an element of manual override
includes the in-built intelligence to so that individuals can make limited
address these other issues. adjustments to the lighting of their
For example, control within a space own workstations. Again, this needs
may include dimming of lighting in to be easy for them to do.
relation to natural daylight and on/off The development of a true
switching using presence detectors to lighting control standard in DALI
determine when lighting is required in a (Digital Addressable Lighting
particular area. In many cases, the Interface) has the potential to Internet. As a result,
maximum benefits will be achieved by revolutionise lighting by users are able to adjust
combining different types of sensor to providing a common and their lighting using local DALI
suit different areas of the building, therefore accessible means of controls or via a web page through
different times of day or variable addressing individual luminaires their PC, while the building operator
within a lit space. can make more extensive alterations
Combine this with from any location. This latter feature is
DALI input devices proving particularly useful for
such as switches organisations with widespread estates.
and multi sensors As a bonus, the same circuit can be
and the used for both mains lighting ballasts and
possibilities are emergency lighting with no extra control
endless. Each circuitry.
luminaire can be Just as importantly, this arrangement
addressed and provides much more flexibility to
grouped to suit the reconfigure the lighting as layouts change
space, function or in line with the increased adoption of
occupant. Controls flexible working practices. The in-built
can be connected flexibility of the lighting system also
to the DALI bus makes the whole process of installation
and connected to and commissioning more efficient and
ballasts or groups cost-effective.
of ballasts by a Changes in legislation and the green
simple software agenda have increased our awareness of
keystroke as the need to control lighting. To make the
opposed to most of the natural daylight within an
specialist hardware office or building whilst at the same time
or separate control automating those functions where people
buses. As an open are so often the weak link in the system
protocol DALI is such as dimming with daylight and
limited to a switching luminaires.
maximum of 64 Energy costs have spiralled and
devices per DALI legislation encourages us all to use
circuit. Fine for technology to save energy. The important
small applications, thing is that the technology that underlies
however if for these developments, whether it’s an
instance we need automated lighting management system
to control lighting or a simple scene setting controller. Using
over several DALI an open platform brings a great deal of
networks then it flexibility.
can be linked to a Armed with this, building operators are
software ‘gateway’ now able to effectively address a wide
that interfaces with range of needs within a single system,
the TCP/IP protocol based on an understanding of how
used by office different people are affected by lighting
networks and the controls.
December 2008 CABLEtalkUIbackUIforward45
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