The USB type A connector on one end plugs into any available USB port on a computer and the DB9 male serial connector on the other end emulates a standard RS232 serial port. This USB to serial adapter overcomes this problem and allows a computer to communicate with these devices when there are no native serial ports available on the computer. Scroll to the LPT/COM port and double click Prolific USB to Serial Comm Port Click Drivers in the Properties section The Driver you choose should read '3.3.2. However, there are still many devices and automated systems which still use the standard serial interface for communication. Many desktop computers and notebooks no longer come equipped with a serial port. The USB type A connector on one end plugs into any available USB port on a computer and the DB9 male serial connector on the other end emulates a standard RS232.
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