How Does DMX Lighting Work? // History, Protocol, and Limitations

3 года назад

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How Does DMX Lighting Work? What is the history behind it? How does the protocol work under the hood and what are some of its largest limitations? DMX512 which is more commonly referred to as just DMX is a lighting control protocol that was developed by USITT. It was designed to be a cross compatible protocol that could allow lighting fixtures to be controlled. The DMX Protocol consists of 512 addresses that make up a DMX Universe. Each address has a value between 0 and 255, which comes from the underlying data type a byte. A DMX connector consists of 5 pins, two of which are used for optional features. There are 3 pin variants, but these are not permitted to be used since they have different electrical characteristics. DMX termination is important because it prevents signal reflection. One limitation of DMX is that it can only hold 512 addresses of data. With modern day lighting taking up many addresses you will run out very quick. To solve this issue other protocols have been created to send DMX over a network.

Chapters:
0:00 - Intro
0:18 - History of DMX
1:50 - How Does DMX Work?
2:42 - DMX Connectors
3:29 - DMX Daisy Chaining
3:52 - DMX Termination
4:26 - DMX Addressing
4:50 - Light Boards
5:19 - DMX Limitations

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