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4. Control By Universal DMX Controller
4.1 DMX512 Connection
1.
At last unit, the DMX cable has to be terminated with a terminator. 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 unit.
2.
Connect the unit together in a “daisy chain” by XLR plug cable from the output of the unit to the
input of the next unit. The cable cannot be branched or split to a “Y” cable. DMX 512 is a very
high-speed signal. Inadequate or damaged cables, soldered joints or corroded connectors can
easily distort the signal and shut down the system.
3.
The DMX output and input connectors are pass-through to maintain the DMX circuit, when one
of the units’ power is disconnected.
4.
Each lighting unit needs to have a DMX address to receive the data by the controller. The address
number is between 0-511 (usually 0 & 1 are equal to 1).
5.
The end of the DMX 512 system should be terminated to reduce signal errors.
6.
3 pin XLR connectors are more popular than 5 pins XLR.
3 pin XLR: Pin 1: GND, Pin 2: Negative signal (-), Pin 3: Positive signal (+)
5 pin XLR: Pin 1: GND, Pin 2: Negative signal (-), Pin 3: Positive signal (+), Pin4, Pin5 not used.
14E
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