Specific:Serial Protocol: RS485 / RS422Specification: USB 2.0 EIA/ RS485 and RS422 standardChip: Max Rate: 921600bpsMax 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 FeetImportant 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: AsynchronousPoint 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: automation systemDistributed control systemLED display equipmentPLC control and managementCNC managementSCADA(Supervisory control and data acquisition) treatment/medication automation automationCheck on work attendanceHuman management.Measuring instruments and monitoring systemData Process material: plasticColor as shownPackage Contents:1 x USB to Serial Converter Cord1 x RS422 RS485 Serial DB9 to Terminal Block AdapterOnly 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.