ADJ MEGA GO PAR64 PLUS User Manual page 9

DMX SETUP
Notice: Be sure to follow figures two and three when making your own cables. Do not use the ground
lug on the XLR connector. Do not connect the cable's shield conductor to the ground lug or allow the
shield conductor to come into contact with the XLR's outer casing. Grounding the shield could cause
a short circuit and erratic behavior.
XLR Male Socket
1 Ground
Figure 3
Special Note: Line Termination. When longer runs of cable are used, you may need to use a termi-
nator 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 manufacturers use 5-pin DMX-512 data cables for DATA trans-
mission in place of 3-pin. 5-pin DMX fixtures may be implemented in a 3-pin DMX line by inserting an
adapter into the line. These adapters are readily available at most electronics stores. The chart below
details a proper cable conversion.
Conductor
Ground/Shield
Data Compliment (- signal)
Data True (+ signal)
Not Used
Not Used
1
3
3-PIN XLR
2
XLR Female Socket
2 Cold 2 Cold
3 Hot
Termination reduces signal errors and
avoids signal transmission problems
1
and interference. It is always advisable
3
to connect a DMX terminal, (Resistance
2
120 Ohm 1/4 W) between PIN 2 (DMX-)
and PIN 3 (DMX +) of the last fixture.
3-Pin XLR to 5-Pin XLR Conversion
3-Pin XLR Female (Out)
COMMON
DMX +
1
3
DMX -
2
1 Ground
3 Hot
Pin 1
Pin 2
Pin 3
9
DMX512 IN
3-PIN XLR
Figure 2
Pin 1 = Ground
Pin 2 = Data Compliment (negative)
Pin 3 = Data True (positive)
Figure 4
5-Pin XLR Male (In)
Pin 1
Pin 2
Pin 3
Do Not Use
Do Not Use