Crestron electronic Green Light GLPS-HSW-FT - Manual (Page 39)

Crestron Commercial Lighting Design Guide
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DALI
DALI
The Digital Addressable Lighting Interface (DALI) is a protocol used for the direct control of lighting ballasts. A DALI controller
communicates bi-directionally with up to 64 individual DALI ballasts over a low-voltage 2-wire bus, providing fixture-level control.
Because each fixture can be controlled individually, DALI systems afford the ability to easily configure and reconfigure spaces. Control
wires are daisy chained between each ballast (up to 64 of them), making wiring much simpler than in 0-10V dimming systems. Besides
being extremely flexible, the DALI data is resistant to noise, allowing it to run alongside high-voltage power lines.
DALI uses bi-directional communication, meaning the system can set dimming levels and query the status of each individual ballast.
DALI systems can report lighting failure, allowing for easier maintenance. Controllers can even query the energy usage for each light,
allowing for tracking of energy costs.
Crestron DALI commissioning software simplifies and expedites system installation. The setup wizard provides step-by-step
configuration of ballast properties, groups, and scenes. Simply set the ballast address, check the connectivity status, edit the minimum
and maximum levels, edit the fade time, and change the ballast grouping and scenes as needed. This powerful tool uses automatic
identification of new hardware IDs for simple ballast replacement. Settings from old ballasts are transferred to replacements with just a
few mouse clicks, saving time and eliminating guesswork.
x Addressable ballasts provide very granular control
x Simple yet robust control wiring
x Bi-directional communication with ballasts
x Easy setup with Crestron DALI commissioning software
When to Specify DALI Systems
DALI systems should be used where ballast-level control is required. DALI is ideal for open-space commercial environments. When
cubicle and workspace layouts change, the lighting can be adjusted accordingly. Other typical applications include lecture halls and
conference rooms. DALI provides tremendous flexibility for both retrofit and new installations.
Example DALI Application
Color Key
AC
Cresnet
LAN