Velleman HQ POWER VDP150SC3 Mode D'emploi page 3

b) 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 resistor between pins 2 and 3, which is
then plugged into the XLR output socket of the last device in the chain.
c) Projector DMX start address selection
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 digital commands from the DMX
controller. Enter the correct number and read it from the display located on the base of the VDP150SC3.
You can use the same starting address for a whole group of devices or enter an individual one for every device.
When using one single 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 3-channel VDP150SC3, you will have to set the start address of the first device
to 1, the second unit to 4 (1 + 3), the third to 7 (4 + 3), and so on.
The LED next to the LED display indicates the status of the DMX signal.
LED flashing: DMX signal present
LED steady off: no input DMX signal
After powering on the device the display shows the DMX start address. Set the desired start address by means of the
YES/NO buttons to increase or decrease the address. Press the ENTER button to confirm. The display will show
"PASS" to confirm your settings. Other functions can also be selected by means of F-DOWN and F-UP buttons,
changed by means of the NO, YES buttons and confirmed by means of the ENTER button.
VDP150SC3 3 VELLEMAN