Digital Addressable Lighting Interface: Difference between revisions

Revision as of 08:35, 25 June 2007

Revision as of 10:03, 19 July 2007

Line 8:

== Advantages ==

*DALI is an open standard not exclusively owned by a single company.

*It only requires onea two [[electrical bus|bus]] wire bus for upcommunication to 64 devices on a DALI loop.

*Because it uses [[Differential Manchester encoding]] it doesn't matter which way around the signal cable is wired, this makes installation more [[foolproof]].

*It doesn't insist the cabling is a "daisy-chain", "stars" and "T's" are perfectly acceptable giving the installers flexibility

*The DALI System is not defined as SELV ( Safety Extra Low Voltage) and therefore can be run next to the mains carrying cables.

*It doesn't require the data to travel down a physically separate cable, it is perfectly acceptable to use a five core cable to run the data down the same cable as the power for the device.

*The DALI signal has a high SNR ( signal to noise ratio) which enables the signal to be exposed to a large amount of noise before the signal is destroyed.

*The Baud ( or transmission speed) of DALI is low (1200hz) to reduce the need for Stub matching of the transmission lines and to reduce the complexity of the system

*The maximum number of devices on a DALI loop is 64(An Advantage and Disadvantage) which is a manageable network size, smaller numbers may not be enough, while higher numbers become harder to commission and track

*Because it uses [[Differential Manchester encoding]] it doesn't matter which way around the signal cable is wired, this makes installation more [[foolproof]].

== Disadvantages ==