Serial Communication, like any data transfer, requires coordination between the sender and receiver. For example, when to start the transmission and when to end it, when one particular bit or byte ends and another begins, when the receiver's capacity has been exceeded, and so on.

A protocol defines the specific methods of coordinating transmission between a sender and receiver. The scope of serial data transmission protocols is large and complex, encompassing everything from electrical connections to data encoding methods. This section summarizes the most important protocols and standards related to using the Serial Driver.

The PCCOM serial card is wide range serial card's, suitable for 2/4/8 port RS232/422/485 serial communication with and without Photo-Isolator for industrial application.