ADJ Quad Phase HP - Page 7

Quad Phase HP DMX Setup
Notice: Be sure to follow gures 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 in contact with the XLR’s outer
casing. Grounding the shield could cause a short circuit and erratic behavior.
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.
1 Ground
XLR Pin Conguration
Pin 1 = Ground
Pin 2 = Data Compliment (negative)
Pin 3 = Data True (positive)
DMX-512 OUT 3-PIN XLR
XLR Male Socket
2 Cold
DMX-512 IN 3-PIN XLR
COMMON
DMX +
DMX -
1
3
2
1
3
2
3 Hot
XLR Female Socket
1 Ground
3 Hot
2 Cold
3
1
2
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 xture.
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 xtures 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-Pin XLR to 5-Pin XLR Conversion
Conductor 3-Pin XLR Female (Out) 5-Pin XLR Male (In)
Ground/Shield 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
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