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