Specific: 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). do NOT connect the adapter to RS422/ RS485 device install the driver on your computer or . 4 Kinds of Working Modes: Asynchronous Point to point / four wires full duplex; Point to multiple point / four wires full duplex; Point to point / two wires half duplex; Point to multiple point / two wires half duplex. Applications: Factory automation system Distributed control system LED display equipment PLC control and management CNC management SCADA(Supervisory control and data acquisition) treatment/medication automation automation Check on work attendance Human management. Measuring instruments and monitoring system Data Process material: plastic Color as shown 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 products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.