Omega Engineering”s miniature IC11 intelligent RS-232 to RS-422/485 converter can be selected for half/full duplex, allowing transmission distances of up to 1,220 m (4,000”). Attach one end to an RS-232 device and connect the other end (screw terminals) to an RS-422/485 device. The converter provides data transfer rates up to 120 kbps. Power is acquired directly from a computer”s serial port, or using the included USB-plug cable. Includes complete operator”s manual. Great for PC-based process monitoring & control. Applications include chemical, petroleum, water and environmental industries.