If you noticed that dip switch 10 was missing on the chart, that is because it is usually reserved for a test mode and is not normally used as part of the addressing system.
When you set the starting DMX address of a given light fixture, you are setting the starting point of the DMX signal for that unit. Within a single ‘DMX universe’ you have a total of 512 channels. Once you’ve set your first light fixture (which should be set to ‘Address 001’) on your DMX decoder, you then need to calculate how many channels are being used and set the second light fixture to the next available DMX channel.
For example, RGB LED tape has three cores, therefore, requires a total of 3 DMX channels to operate (one channel for red, one channel for green, and one channel for blue). The first length of RGB LED tape would be set to ‘Address 001’ and the next length of tape would begin on DMX channel 4.
The above right graphic shows that dip switch number 3 is equivalent to DMX channel 4, so this is what the decoder would be set to on the second length of RGB LED tape in the above scenario.