: Serial Protocol: RS485 / RS422 Specification: USB 2.0; EIA/ RS485 and RS422 standard Chip: Max Rate: 921600bps Max Distance (RS485/422 End): 984ft (300m) at 921600bps, 1968ft (600m) at 38400bps, 3937ft (1.2km) at 9600bps; USB-bus powered, no external power needed. Automatic hand-shaking protocol supported. Item Length: 1.5 Feet Important Note: The USB end must be connected to PC or . Other USB devices like digital camera, scanner and printer is not allowed. To avoid reflections on cables it is necessary to use appropriate termination resitors (120, 1/4W). Please do NOT connect the adapter to RS422/ RS485 device until you install the driver on your computer or . 4 Kinds of Working Modes: Asynchronous to / four wires full duplex; to multiple / four wires full duplex; to / two wires half duplex; to multiple / two wires half duplex. Applications: automation system Distributed control system LED display equipment control and management management SCADA(Supervisory control and data acquisition) treatment/medication automation Building automation Check on work attendance Human management. Measuring instruments and monitoring system Data collection Process material: plastic Color Package Contents: 1 x USB to Serial Converter Cord 1 x RS422 RS485 Serial DB9 to Terminal Block Adapter Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.