SGM PALCO 3+ User Manual page 10

Address 1 Address 9 Address17
DMX-512 connection with DMX terminator
Thought 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.
4
5
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 signals control. 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 have different
addresses for each fixture individually.
If you set the same address, all the units will start to "listen" to the same signal control from the
same channel number. In other words, changing the settings of one channel will affect all the
fixtures at the same time.
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. This means that changing the settings of one
channel will affect only the selected fixture.