rs232,rs422 Serial Port Standard Summary

Both RS232 and RS422 are widely used asynchronous serial interface standards. Because they are simple to implement and consume less resources in IO ports, it is a good idea to transfer at low speed.

The RS232 is a single-ended route with a maximum baud rate of 115200 and a transmission distance of no more than 150 meters, with a logic 1 level of 3 to -15v and a logic 0 level of 3 to 15V.

The RS422 is a differential route that requires two transmission lines per signal, so it has a higher baud rate and a longer transmission distance than RS232.

The baud rate is a communication rate expressed in bits per second.

　　

rs232,rs422 Serial Port Standard Summary