To using CODE SDA 4 can constitute a large digital lighting system. The following figure shows a connection which can control many different equipments.
Actually, DMX512 has 512 data channels, so it can handle 512 equipments (1 equipment uses 1 channel). The figure above is a DMX512 region. It is said that 1 region has 512 data channels. If over 512 channels, we need more than 1 DMX512 region to transmitted data.