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6. DMX512 Connections
The DMX512 protocol is used widely in intelligent lighting control, with a
maximumof512channels.
1. Ifyourcontrollerhasa5-pinDMXoutput,youneedtousea5-pinto3-pin
adapter cable.
2. Linkthexturestogetherina“daisychain”byconnectingXLRcablesfrom
theoutputofthexturetotheinputofthenextxture.Thecablecannotbe
branchedorsplittoa“Y”cable.Inadequateordamagedcables,soldered
joints, or corroded connectors can easily distort the signal and shut down
the system
3. TheDMXoutputandinputconnectorsarepass-throughtomaintaintheDMX
circuit when one of the units’ power is disconnected.
4. Atthelastxture,theDMXcableshouldbeterminatedtoreducesignal
errors.Soldera120ohm1/4WresistorbetweenPin2(DMX-)andPin3
(DMX+)intoa3-pinXLRplugandconnectittothelastxture’sDMXoutput.
5. Each lighting xture must have its address set to receive data sent by
the controller. The address number is between 0-511 (usually 0 & 1 are
equal to 1). Please refer to “4.2 Main Function” above.
6. 3-pinXLR:Pin1: GND,Pin2:Negativesignal(-),Pin3:Positivesignal(+)
5-pinXLR:Pin1: GND,Pin2:Negativesignal(-),Pin3:Positivesignal(+)
Pin4/5:Notused.
7. Troubleshooting
Followingareafewcommonproblemsthatmayoccurduringoperation.Here
aresomesuggestionsforeasytroubleshooting:
A. The xture does not work, no light
1. Checktheconnectionofpowerandmainsfuse.
2. Measure the mains voltage on the main connector.
B. Not responding to DMX controller
1. DMX LED should be on. If not, check DMX connectors and cables to
verify they are linked properly.
2. If the DMX LED is on and the channel does not respond, check the
address settings and DMX polarity.
3. IfyouhaveintermittentDMXsignalproblems,checkthecableandxture
connectors for proper function.
4. TrytouseanotherDMXcontrollerforcomparison.
5. CheckiftheDMXcablesarerunnearoralongsidehighvoltagecables
that may cause interference to the DMX interface circuit.
C. Some xtures don’t respond to the controller
1. YoumayhaveabreakintheDMXcabling.ChecktheLEDforthe
response of the master/ slave mode signal.
2. WrongDMXaddressinthexture.Settheproperaddress.
D. No response to sound
1. MakesurethexturedoesnotreceiveDMXsignal.
2. Checkmicrophonetoseeifitisgoodbytappingthemicrophone.
8. Fixture Cleaning
Cleanwithsoftclothusingaverymildhouseholddetergent.Alwaysdrythe
parts carefully.