Dmx Primer - Nicols C 1216 Manuel D'utilisation

User manual
4. APPENDIX

4.1 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+).
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