User Manual

Chapter 2
Protocols
The LPU-1 and LPU-2 support the output of DMX via the 3-pole XLR connec-
tor on the device. Art-Net and sACN output can also be enabled to transmit
the DMX data over the network. The following chapter will explain what these
three protocols are. The LPU-1 and LPU-2 support 1 universe, that can be
output simultaneously via DMX, ArtNet and sACN. It is important to note
that only output is supported.
2.1 DMX-512
DMX-512 is the standard communication protocol for stage lighting. One DMX
network contains 512 channels which is called a ’universe’. Each lighting fixture
connected to this universe will use one or more of these channels. On the lighting
fixture itself the DMX address can be set. This address corresponds to the first
channel that this fixture will listen.
As shown in figure 2.1 a simple RGB light might use 3 channels. Setting this
light to DMX address 1 will mean that the first three channels of the universe
control the red, green, and blue values of this light. When adding a second
RGB light, it would commonly be set to the next free address. In this case, that
would be address 4. It will then listen to channels 4, 5 and 6 for red, green and
blue.
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