User Manual

12.2. Building a Serial DMX Chain
DMX xtures are designed to receive data through a serial Daisy Chain. A Daisy Chain
connection is where the DATA OUT of one xture connects to the DATA IN of the next
xture. The order in which the xtures are connected is not important and has no effect
on how a controller communicates to each xture. Use an order that provides for the
easiest and most direct cabling.
DMX Terminator
DMX 512
CHAIN
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+).
DMX use of XLR connectors
1 = Ground / Shield
2 = DMX +
3 = DMX -
INPUT OUTPUT
CAUTION: Wires must not come into contact with each other; otherwise the
xtures will not work at all, or will not work properly.
12.3. 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 (+), respectively, pins 2 and 3, which is then
plugged into the output socket on last projector in the chain. The connections are
illustrated below.
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ENGLISH
SCENEMAKER 1216 User manual