The NTX RPU is the answer to the ever more complex demands of the theatre. The control of a multitude of moving lights, colour- and gobo-changers,and video projectors, and the integration of visualisation tools are no rarity nowadays and require a greater number of control circuits. The NTX RPU is conceived as an external server connected to the lighting network via Ethernet, opening up totally new areas in processing speed, multi-user operation and the management of show data.