9
7. DMX512 CONNECTIONS:
The DMX512 is widely used in intelligent lighting control, with a maximum of 512
channels.
Termination reduces signal errors and to avoid signal transmission problems and interference. It is always
advisable to connect a DMX terminal. (resistance 120ohm 1/4W ) between pin2 (DNX-) and pin3 (DMX+)
of the last fixture.
1.
Connect the fixture together in a “daisy chain” by XLR plug cable from the output
of the fixture to the input of the next fixture. The cable cannot be branched or
split to a 2Y” cable. Inadequate or damaged cables, soldered joints or corroded
connectors can easily distort the signal and shut down the system.
2.
The DMX output and input connectors are pass-through to maintain the DMX
circuit when no power is connected to the fixture.
3.
At last fixture, the DMX cable has to be terminated with a terminator to reduce
signal errors. Solder a 120-ohm 1/4W resistor between pin 2(DMX-) and pin
3(DMX+) into a 3-pin XLR-plug and plug it in the DMX-output of the last fixture.
4.
Each lighting fixture needs to have an address set to receive the data sent by the
controller. The address number is between 0-511 (usually 0 & 1 are equal to 1).
•
1
•
3
•
2
•
1
•
3
•
2
INPUT
OUTPUT
COMMON
DMX +
DMX -
DMX 512
120 OHM 1/4W
