ADJ FOCUS BEAM LED, User Instructions, Page: 15 / 34

15
DMX SETUP
SPECIAL NOTE: LINE TERMINATION
When longer runs of cable are used, you may need to use a terminator on the last unit to avoid erratic
behavior. A terminator is a 110-120 ohm 1/4 watt resistor, which is connected between pins 2 and
3 of a male XLR connector (DATA + and DATA -). This unit is inserted in the female XLR connector
of the last unit in your daisy chain to terminate the line. Using a cable terminator (ADJ part number
Z-DMX/T) will decrease the possibilities of erratic behavior.
5-Pin XLR DMX Connectors.
Some manufactures use 5-pin DMX-512 data cables for DATA transmission in place of 3-pin. 5-pin
DMX fixtures may be implemented in a 3-pin DMX line. When inserting standard 5-pin data cables in to
a 3-pin line a cable adapter must be used, these adapters are readily available at most electric stores.
The chart below details a proper cable conversion.
3
1
Termination reduces signal errors and avoids signal
transmission problems and interference. It is always
advisable to connect a DMX terminal, (Resistance
120 Ohm 1/4 W) between PIN 2 (DMX-) and PIN 3
(DMX+) of the last fixture. Figure 4
2
3-Pin XLR to 5-Pin XLR Conversion
Conductor 3-Pin XLR Female (Out) 5-Pin XLR Male (In)
Ground/Sheld Pin 1 Pin 1
Data Compliment (- signal) Pin 2 Pin 2
Data True (+ signal) Pin 3 Pin 3
Not Used Do Not Use
Not Used Do Not Use