USB A to RS232 DB09/DB25 Serial Adapter - Male/MaleInternal Reference :
A USB to RS232/RS485 cable is a cable that allows for the conversion between USB and RS232 or RS485 communication interfaces. It provides a convenient way to connect devices that use RS232 or RS485 serial communication to a computer or other devices with a USB port.
RS232 is suitable for short-distance communication, usually connecting computers and external devices, while RS485 is suitable for long-distance communication and multi-device communication and is commonly used in industrial environments. They differ in terms of electrical and physical characteristics, transmission distance and communication methods, so the appropriate standard needs to be selected according to the needs of the specific application.