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5. A
PPENDIX
DMX Primer
There are 512 channels in a DMX-512 connection. Channels may be assigned in any manner.
A fixture capable of receiving DMX 512 will require one or a number of sequential channels.
The user must assign a starting address on the fixture that indicates the first channel reserved
in the controller. There are many different types of DMX controllable fixtures and they all may
vary in the total number of channels required. Choosing a start address should be planned in
advance. Channels should never overlap. If they do, this will result in erratic operation of the
fixtures whose starting address is set incorrectly. You can however, control multiple fixtures of
the same type using the same starting address as long as the intended result is that of unison
movement or operation. In other words, the fixtures will be slaved together and all respond
exactly the same.
DMX fixtures are designed to receive data through a serial Daisy Chain. A Daisy Chain
connection is where the DATA OUT of one fixture connects to the DATA IN of the next fixture.
The order in which the fixtures are connected is not important and has no effect on how a
controller communicates to each fixture. Use an order that provides for the easiest and most
direct cabling. Connect fixtures using shielded two conductor twisted pair cable with three pin
XLR male to female connectors. The shield connection is pin 1, while pin 2 is Data Negative (S-
) and pin 3 is Data positive (S+). CHAUVET carries 3-pin XLR DMX compliant cables, DMX-10
(33'), DMX-4.5 (15') and DMX-1.5 (5')
Legend™ 4500 User Manual
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12/10/2008 4:28 PM
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