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3. SETUP
DMX Cabling
The LED PAR has standard 3-pin XLR connectors for DMX con-
trol and daisy-chaining. Up to 32 devices can be daisy-chained
together on a single run. Standard microphone cables will
probably work OK, but DMX is a serial data transmission with
impedance specifications that are different than analog audio.
Cables specifically designed to transmit DMX signals will always
work best. As an example, Belden© 9841 meets the specifica-
tions for DMX-512 applications. The longer the cable distance,
the more important proper cable selection is.
1
3
2
DMX Termination
Sometimes, errors will crop up in your DMX line – especially if it
is a long run. When this is the case, or if you just want to make
sure your DMX runs have the best chance at accurate transmis-
sion, you can use a terminator. A terminator is a 120 ohm ¼
watt resistor which is connected between pins 2 and 3 of a male
XLR connector (DATA + and DATA -). This connector is inserted
in the female XLR connector of the last fixture in your daisy
chain to terminate the line. Using a cable terminator will de-
crease the possibility of erratic behavior. Terminators are avail-
able on the internet and from lighting retailers. If you're handy
with a soldering iron, they are simple to build yourself!
DMX Terminator
3-pin XLR Male connector
120 Ohm resistor
¼ watt
Page 6
Shield
1
Data +
3
2
Data -
2
1
3
LED 36 User Manual rev. A
3-pin vs. 5-pin
Some manufacturers use 5-pin XLR connectors for DMX trans-
mission. Don't worry! The two are still compatible. Adapters are
available on the internet and from lighting retailers. If you want
to build your own, here are the proper connections:
Cable Conductor
3-pin Female
(output)
Shield (Ground)
DMX Data +
DMX Data -
not connected
not connected
Master/Slave Mode
The LED PAR also has a Master/Slave mode. In this mode you
can set one fixture in the line to act as the master controller –
and up to 32 other fixtures can be connected and will mirror the
operation of the first. In this configuration, you do not need a
DMX controller.
Master Fixture
DMX IN
DMX OUT
DMX IN
Slave Fixture
©2010 Bargeheights, Inc.
5-pin Male
(input)
Pin 1
Pin 1
Pin 2
Pin 2
Pin 3
Pin 3
-
not connected
-
not connected
Connect the fixtures just as
you would for DMX control.
See the OPERATION sec-
tion of this manual for more
information on how to set up
Master/Slave mode.
DMX OUT
to next fixture
Page 7
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