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ADJ Products, LLC - www.adj.com - Focus Spot 4Z/Focus Spot 4Z Pearl User Manual Page 11
Special Note: Line Termination.
When longer runs of cable are used, you may need to use a termina-
tor 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.
Focus Spot 4Z/Focus Spot 4Z Pearl DMX Set Up
DMX512 IN
3-PIN XLR
SOUND
REMOTE
CONTROL
INPUT
POWER
INPUT OUTPUT
SOUND
REMOTE
CONTROL
INPUT
POWER
INPUT OUTPUT
SOUND
REMOTE
CONTROL
INPUT
POWER
INPUT OUTPUT
DMX512
DMX+,DMX-,COMMON
1
2
3
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.
1
2
3
1
2
3
DMX +
DMX -
COMMON
DMX512 OUT
3-PIN XLR
Figure 4
5-Pin XLR DMX Connectors.
Some manufactures use 5-pin DMX-512 data cables for DATA transmis-
sion 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 adaptor must be used, these adaptors are readily
available at most electric stores. The chart below details a proper cable conversion.
Conductor 5-Pin XLR Male (In)3-Pin XLR Female (Out)
Pin 1
Do Not Use
Do Not Use
Pin 3
Pin 2
Pin 1
Pin 3
Pin 2
Not Used
Not Used
Data True (+ signal)
Data Compliment (- signal)
Ground/Shield
3-Pin XLR to 5-Pin XLR Conversion
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