XM745-V1.0-NR
8
Address 9 Address 5 Address 1
Please note:
to ensure maximal stability, when the voltage is 120V, only six devices may be
connected together in this manner! From the seventh device, please connect to power supply to get
power for the second link; when the voltage is over 220V, only twelve devices may be connected
together in this manner! From the thirteenth device, please connect to power supply to get power for
the second link.
6. DMX-512 connection with DMX terminator
For installations where the DMX cable has to run a long distance or is in an electrically noisy
environment, such as in a discotheque, it is recommended to use a DMX terminator. This helps in
preventing corruption of the digital control signal by electrical noise. The DMX terminator is simply
an XLR plug with a 120
Ω
resistor connected between pins 2 and 3,which is then plugged into the
output XLR socket of the last fixture in the chain. Please see illustrations below.
7. Projector DMX start address selection
All fixtures should be given a DMX starting address when using a DMX signal, so that the correct
fixture responds to the correct control signals. This digital starting address is the channel number
from which the fixture starts to “listen” to the digital control information sent out from the DMX
controller. The allocation of this starting address is achieved by setting the correct number on the
display located on the base of the device.
You can set the same starting address for all fixtures or a group of fixtures, or make different address
for each fixture individually.
If you set the same address, all the units will start to “listen” to the same control signal from the
same channel number. In other words, changing the settings of one channel will affect all the fixtures
simultaneously.
If you set a different address, each unit will start to “listen” to the channel number you have set,
based on the quantity of control channels of the unit. That means changing the settings of one
channel will affect only the selected fixture.
