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> Lighting equipment / Light management / Interfaces / DALI / Broadcast mode
Figure 3.241: Schematic representation: DALI dimmer, e.g. as a "rotary potentiometer" for flush socket installation.
for broadcast operation without addressing
switching by pressing and
dimming by turning the thumb wheel
commercially available are these control units as well with additional colour temperature control function for DT8 gears
In broadcast mode, all participants are controlled via one joint signal. Addressing is not required. Luminaires can be connected to the control device and operated without DALI commissioning (plug and play). The number of selectable control gear units is generally limited to 64 or fewer (see chapter ). An expansion can be achieved via one or more repeaters which can also be cascaded. Thus, the number of DALI participants that can be dimmed simultaneously is unlimited (see figure).
Electrical installation is done similarly to 1...10 V interface applications. In this respect, three of the aforementioned DALI properties (see above) prove advantageous in direct comparison to the 1…10 V interface:
Observing polarity is not necessary.
Various light sources are dimmed uniformly.
Connected luminaires can be switched using the interface.
If separate control for luminaire groups is intended, they must be operated at separate control lines.
With DT8 control gear units (Device Type 8, see chapter “DALI colour control”) and control devices supporting the particular DT8 commands, colour control can also be achieved in broadcast mode. Colour temperature adjustments can be made e.g. using a “DALI potentiometer” (see figure) by rotating the adjustment wheel while pressing it down.
DALI Addressed mode
Leading-edge and trailing-edge phase cutting 1...10-V interface Push-Dim DMX DALI
Broadcast mode Addressed mode DALI scene control DALI colour control DALI installation DALI system expansion DALI parameters and initialisation Manual parameterisation and monitoring
Introduction Visual needs Need for orientation Non visual needs
Guidelines Overview Work places Visual task area Surrounding area Illuminance Luminance distribution Limitation of glare Lighting direction, modelling Aspects of colour Flicker and stroboscopic effects Daylight
Maintenance Factor Light and safety at work Light and non-visual effects Light and economy Light and environment Lighting design Lighting measurement Emergency lighting
Lighting of traffic zones and geneal areas in buildings Lighting of industrial activities and crafts Lighting of offices and VDU workstations Lighting of design and CAD offices Lighting of sports facilities Lighting of health care facilities Lighting of geriatric care facilities and nursing homes Lighting of public areas Lighting of salesrooms Lighting of educational facilities Lighting of traffic areas Lighting of car parks Ligthing of further indoor spaces
Luminaires The enhanced concept of quality Photometric classification Photometric properties Photo biology safety Mounting and electrical connection Luminaire labelling Luminaire operation LED luminaire operation Operation of FL luminaires Electrical safety Fire protection Electromagnetic safety Mechanical safety Chemical and miscellaneous impact Acoustic properties Ventilation properties
Firehazardous locations Room with bathtubs and showers Swimming baths Exterior installations Agricultural and gardening plant locations Food industry Clean rooms Requirements on mediacal rooms Emergency light installations
Luminaire selection chart
Light management application and function Presence detection Daylight-dependent regulation Interfaces Building management, KNX and other bus systems
Light sources types Characteristics of light sources
ABC, DF, G, ILM, NO, P, QRSUV, W
Subject index
StandardsGuidelines and instructionsEuropean directives and regulationsFurther publications
Lighting societies
Standardisation institutes
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