Gamma Oculus 40 Manuel de l'utilisateur - Page 7

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32 Fixture Rule – DMX only allows you to connect up to 32 fixtures in a single daisy

chain for signal strength. Sometimes, depending on the fixtures and cable length, this

number is less (or more).

DMX Cables can be 3-pin or 5-pin. These use the same type of data, and in the 5-pin

only pins 1, 2, and 3 are used. The cable should be a 2 conductor, shielded cable of at

least 110 ohms resistance. Microphone cable is not DMX cable.

Please refer to the diagram below:

For installations where the DMX cable has to run a long distance or is in an electrically

noisy environment, it is recommended to use a DMX terminator. This helps in preventing

corruption of the digital control signal by electrical noise and reflections. The DMX

terminator is simply an XLR plug with a 120 Ω resistor connected between pins 2 and 3,

which is then plugged into the output XLR socket of the last fixture in the chain. Please

see illustrations below:

Oculus 40 – GAMMA LED Vision

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