Aten (IC485S) RS-232 to RS-485/RS-422 Bi-directional Converter Aten IC485S is a 2-way converter for converting RS-232 signals to and from RS-422/RS-485 signals in long-distance application up to 1200m (4000 ft.). It supports the connection of up to 32 hubs.Aten (IC485S) RS-232 to RS-485/RS-422 Bi-directional Converter Features and Benefits:Data transmission controlled by the RTS signal. DCE/DTE selectable. Point to point, multidrop, and simplex/duplex link selection. Four wire full duplex/two wire half duplex. Monitor configuration support. Compact size. OS Compatibility: WIN98?WIN ME?WIN 2K ?WIN NT and WIN XP.