The SL-12 is a highly versatile control processor for AV equipment -especially projectors and associated equipment in any room (such as classrooms, boardrooms, or auditoriums). It streamlines operations and simplifies control by integrating audio, video, and computer-video sources into a centralized system. 1 Ethernet Port - For controlling several AV products over ETH. 4 General Purpose I/O Ports - Can be configured as analog inputs, digital inputs, or digital outputs for interfacing with a variety of devices such as sensors, switches, LEDs, and relays. 4 Bidirectional RS-232 Ports - Control AV equipment such as projectors, LCD and PDP displays, power amplifiers, switchers and scalers. 8 Relay Contact Closure Ports - Conveniently control other room items related to the AV system such as raising and lowering drapes, the screen or the projector. IR Control - 3 inputs (1 built-in receiver and 2 on 3.5mm mini jacks) & 4 outputs (on terminal blocks). IR Learning Function - Learns commands from any IR remote for customized control of external sources. 1 RS-485 Serial Port. Kramer Site-CTRL™ Compatible - For remote control and management of networks over the Ethernet port using Kramer Site-CTRL software. K-NET™ Control Channel - For connecting compatible user interfaces and supplying power and control data over a single cable. USB Port - For uploading configuration file. Flexible Control - Ethernet, K-NET™, RS-485, IR sensor and external IR commands. Size - Compact MultiTOOLS® - 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-13 rack adapter.