VDP150CC4
3
VELLEMAN
5. Use
The moving head can be controlled by up to 4 DMX channels:
CHANNEL 1: magenta
CHANNEL 2: yellow
CHANNEL 3: cyan
CHANNEL 4: shutter/dimmer
a. Detailed DMX values per channel
Description
From
To
Function
CHANNEL 1
dimmer
0
255
magenta > white
CHANNEL 2
cyan
0
255
yellow > white
CHANNEL 3
yellow
0
255
cyan > white
CHANNEL 4
magenta
0
255
closed > open
b.
DMX-512 control connection
Connect the provided XLR cable to the female 3-pin XLR output of your
controller and the other side to the male 3-pin XLR input of the
VDP150CC4
. Multiple
VDP150CC4
's can be linked through serial linking.
The linking cable should be two core, screened cable with XLR input and
output connectors. Please refer to the diagram on the right.
c. DMX-512 connection with DMX termination
A DMX terminator is recommended for installations where the DMX cable has to run a long
distance or is in an electrically noisy environment (e.g. discos). The terminator prevents
corruption of the digital control signal by electrical noise. The DMX terminator is simply an
XLR plug with a 120
Ω
resistor between pins 2 and 3, which is then plugged into the XLR
output socket of the last device in the chain.
Please see illustrations to the left.
d. Projector DMX start address selection
Unscrew the 6 screws to remove the cover holding the electronic PCB.
All DMX-controlled devices need a digital start address so that the correct device responds to the signals. This digital
start address is the channel number from which the device starts to “listen” to the DMX controller. The allocation of
this start address is achieved by setting the correct number by means of the DIP switch located on the inside of the
VDP150CC4
.
You can use the same starting address for a whole group of devices or enter an individual one for every device.
When all devices have the same address, all the units will “listen” to the control signal on one particular channel. In
other words: changing the settings of one channel will affect all devices simultaneously. If you set different
addresses, each device will “listen” to a separate channel number. Changing the settings of one channel will only
affect the device in question.
In the case of the 4-channel
VDP150CC4
, you will have to set the start address of the first unit to 1, the second unit
to 5 (1 + 4), the third to 9 (5 + 4), and so on.
Making the DMX start address of the device is defined by the first 9 DIP switches. The encoding is binary: DIP switch
1 is value 1, DIP switch 2 is value 2, DIP switch 3 is value 4, DIP switch 4 is value 8, etc.
