VDP401GLD7
VELLEMAN
6
c.
DMX512 Chain with 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.
d.
DMX Start Address
All DMX-controlled devices need a digital start address so that the correct device responds to the signals. This start
address is the channel number from which the device starts to “listen” to the DMX controller. Enter the correct
number and read it from the display located on the base of the
VDP401GLD7
.
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
VDP401GLD7
s 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 7-channel
VDP401GLD7
, you will have to set the start address of the first
VDP401GLD7
to 1, the
second
VDP401GLD7
to 8 (1 + 7), the third to 15 (8 + 7) and so on.
The DMX start address is defined by the first 9 DIP switches. The encoding is binary: DIP n° 1 is value 1, DIP n° 2 is
value 2, DIP n° 3 is value 4, DIP n° 4 is value 8, etc. Example: If the start address should be 95, the settings would
be as follows: 111110100 (1 + 2 + 4 + 8 + 16 + 0 +64 + 0 + 0 = 95).
DIP switches 10, 11 and 12 are used to select the following modes: sound-active mode, auto mode, master sound,
master auto, slave mode, DMX mode and test mode.
Depending on how you wish to control the projector, you will need to assign the correct DIP switch address according
to the chart below (0 = off, 1 = on, X = on or off):
DIP switch chart
Function
1
2
3
4
5
6
7
8
9 10 11 12
X
X
X
X
X
X
X
X
X 0
0
0
Sound active mode
X
X
X
X
X
X
X
X
X 0
0
1
Auto mode
X
X
X
X
X
X
X
X
X 0
1
0
Master sound mode
X
X
X
X
X
X
X
X
X 0
1
1
Master auto mode
X
X
X
X
X
X
X
X
X 1
0
0
Slave mode
Set DMX address
1
0
1
DMX mode
X
X
X
X
X
X
X
X
X 1
1
0
Test mode
6. Cleaning and Maintenance
One of the most critical components in your
VDP401GLD7
is the optics. If the optics are dirty, you will experience a
loss in output power. To ensure that your projector output is at its maximum, it is recommended to regularly clean
your device, especially if the projector is subject to large amounts of dust. Take following notes into consideration:
1. Disconnect the device from the mains prior to maintenance activities.
2. Use a new cotton bud for each pass. Do not use any coarse materials such as newspapers. These will scratch
the surface which will lead to loss in power output.
3. Only use reagent grade acetone or 90% isopropyl alcohol.
4. Take care not to apply too much force to avoid breaking the mirror.
5. Let the mirror dry before use.
6. Proceed with motions shown at right.
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