Xpress-512s xpress-512s is a powerful dmx interface that lets you control showxpress lighting control software on either windows® and mac os x systems. you can easily store and play back 1 show without a computer. this self-contained, aluminum unit controls up to two dmx universes – one full dmx universe and an additional artnet universe. adding additional universes is easy by connecting additional interfaces. xpress-512s is hot-swappable and automatically re-connects within seconds.