How does it connect?

As the principle drawing shows the Neets Control - EU Professional is controlling the projector via one RS-232 port. The other RS-232 port is controlling the amplifier which controls the sound from the DVD, the VCR, the laptop and the PC. The projector lift and the screen are controlled via I/O. Furthermore, this project can also control either the keyboard lock, an alarm, the room sensor or the light via I/O. The IR is controlling the DVD and the VCR (the functions on the DVD and VCR can be controlled via the sub keys on the panel). Finally this project has a master/slave function which is controlled via LAN.