User Manual
on how a controller communicates to each xture. Use an order that provides for the
easiest and most direct cabling.
DMX Termonator
Unit 1 Unit 2 Last Unit
DMX 512
Connect xtures using shielded 2-conductor twisted pair cable with 3-pin XLR male to
female connectors. The shield connection is pin 1, while pin 2 is Data Negative (S-), and
pin 3 is Data positive (S+).
3-Pin XLR
Pin 1: GND
Pin 2: DMX -
Pin 3: DMX +
OUTPUTINPUT
DMX use of 3-Pin XLR Connectors
CAUTION: Wires must not come into contact with each other; otherwise the
xtures will not work at all, or will not work properly.
8.1. DMX Terminator
DMX is a resilient communication protocol, however errors still occasionally occur.
In order to prevent electrical noise from disturbing and corrupting the DMX control
signals, a good habit is to connect DMX output of last xture in the chain to a DMX
terminator, especially over long signal cable runs.
The DMX terminator is simply an XLR connector with a 120Ω (ohm),
1/4 Watt resistor connected across Signal (-) and Signal (+), respective-
ly, pins 2 and 3, which is then plugged into the output socket on last
projector in the chain. The connections are illustrated below.
Complimentary signal cable can transmits signals to 20 unit xtures at most.
Signal amplier is a must to connect more xtures.
8.2. 3-Pin vs 5-Pin DMX cables
DMX connection protocols used by controllers and xtures manufacturers are not
120ohm, 1/4W
resistor
DMX Terminator
9
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TWILIGHT 60 ENDLESS User manual