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Distributed Control, DMX 101 A DMX 512 Handbook, Elation Professional
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DMX 101
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Specs
While 4000 feet may be specified by the standard, most manufacturers recommend DMX runs of no more than 1000 feet 300 feet between devices before using a repeater to regenerate the signal. Each device should have input and output connectors, but these are usually wired together. No re-transmissionor amplification is performed
Signal
Many DMX devices such as dimmers and intelligent fixtures are capable of receiving several control channels at once. If a Dimmer has four channels capable of controlling four Light Fixtures , it must know which four control channels to receive. This is accomplished by setting a ‘base address’, or the DMX address for the first Light Fixture channel 005, in this example. The remaining Light Fixtures will be controlled by the next three sequential control channels. The DMX Decoder knows it needs only these four control channels, and will ignore the rest
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DMX 101: A DMX 512 Handbook
5.4 Distributed Control
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Contents
DMX A DMX 512 HANDBOOK
7+92/87,21&206&+$1
DMX 101 A DMX 512 Handbook
Handbook Revision May
Elation Professional
Table of Contents
1. Introduction to DMX
2.1 USITT
2. Industry Standards
2.2 ESTA
2.4 EIA/TIA
2.3 ANSI
2.5 References
3. Theory of Operation
3.1 The Cable TV Analogy
Now imagine a simple DMX system Figure 2, where
Many DMX devices such as dimmers and intelligent fixtures are capable of receiving several control channels at once. If a Dimmer has four channels capable of controlling four Light Fixtures Figure 3, it must know which four control channels to receive. This is accomplished by setting a ‘base address’, or the DMX address for the first Light Fixture channel 005, in this example. The remaining Light Fixtures will be controlled by the next three sequential control channels. The DMX Decoder knows it needs only these four control channels, and will ignore the rest
3.2 DMX Communications
While 4000 feet may be specified by the standard, most manufacturers recommend DMX runs of no more than 1000 feet 300 feet between devices before using a repeater to regenerate the signal. Each device should have input and output connectors, but these are usually wired together. No re-transmissionor amplification is performed
3.3 Summary
4. Protocol Specifications
Wire
4.1 Connectors
Signal
4.2 Cabling
Description
4.3 Data
Element
State
5. Sample Applications
5.1 Dimmer Control
DMX 101 A DMX 512 Handbook
5.2 Intelligent Fixture Control
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5.3 Dimmer & Intelligent Fixture Control
DMX 101 A DMX 512 Handbook
5.4 Distributed Control
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