IRPLDIM2E View Datasheet(PDF) - International Rectifier
Part Name
Description
Manufacturer
IRPLDIM2E Datasheet PDF : 13 Pages
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IRPLDIM2E
Digitally Addressable Lighting Interface (DALI)
The Digital Addressable Lighting Interface (DALI), international standard prlEC929, is a communication protocol
and method to interface lighting units on a 2-wire network. The DALI protocol is 16 bits and supports addressing up
to 64 ballasts individually, 16 groups or broadcasting to the entire lighting network. Aside from the protocol, DALI
supports fading, logarithmic dimming, scenes and fault detection.
The DALI allows for a complete lighting environment to be controlled and managed efficiently. The DALI can control
(transmit and receive) up to 64 different ballasts with the same control system, transmitting instructions to single
ballasts or to a group of ballasts. The ballast provides eye sensitive dimming over a wide range (1-100%). Various
operating parameters can be changed and stored dynamically within the ballast memory. For example, scene
levels can be set for different groups of ballast. Also, maximum brightness, minimum brightness, fade-time and
several other features can be set as desired. Another feature is the ability to diagnose problems such as lamp failures.
Perfect Light Quality
By means of digital control, the light level can be adjusted very precisely according to individual lighting needs. The
DALI includes 256 levels of brightness and a logarithmic dimming curve (Figure 2). The use of this curve allows for
better control at lower light levels where the human eye is more sensitive.
Dim value
255
240
225
210
195
180
165
150
135
120
105
90
75
60
45
30
15
0
0 10 20 30 40 50 60 70 80 80 100
Relative lighting level %
Fig. 2 Dimming Characteristics
2
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