The USB to RS485 compact converter is a professional serial converter for your RS485 devices. It’s designed with a input/output terminal screw connector that easily wires into your serial devices. It's a great converter and easy to use in a compact package.
USB to Serial RS-232 DB9 mini adapter with USB 2.0 extension cable is a FTDI based adapter that converts a USB port into a RS232 serial port capable of speeds up to 921,600 bps. It is designed to make serial port expansion easy with plug and play and built-in drivers for older Windows systems. It is installed as a standard Windows COM port.