You just need the right USB adapters ... commonly RS232, which is a standard that dates back to the 1960s. Although RS232 is the most widely used, these adapters can also feature RS485 or RS422 ...

The DSX-USB Communications Interface is a simple yet rugged USB converter. This port powered device connects to any 2.0 USB Port through the supplied cable. The module provides an RS-232 output ...

Advantech’s industrial-grade isolated RS-232 to RS-422 or RS-485 converter is now available from the company’s e-store. With no change to associated computer hardware or software, the device, called ...