The IA-2117-UC is a tiny, intelligent, 16-ch Relay Board Controller, sharing both SPST and SPDT relays, 3-ch Digital Input handling both “Dry-Contact” and Voltage Level defined status, USB powered and USB controlled. The IA-2117-U, with as small footprint as 4.3”x2”, 16 relays with a contact rating of 2 Amp @ 30VDC, Independently wired, and 3-ch “Dry-Contact” inputs makes both an efficient and moderately priced Relay Control Solution. For bussed relay solution, kindly refer to IA-2116-U that shares the same footprint. Dot.net Library, USB Drivers and Open Code Samples, are provided free of charge, attached to each IA-2117-U package, designed for fast and successful software implementation.