What is the Difference Between RS232 and RS485?

The Physical Structure Of The RS232 Interface And RS485 Interface
1. What Is The RS232 Interface
One of the computer communication interfaces, the RS-232 interface usually comes in the form of 9 pins (DB-9) or 25 pins (DB-25). There are two groups of RS-232 interfaces on personal computers, which are called COM1 and COM2 respectively.
Rs232 interface is a standard for serial communication developed in 1970 by the U.S. Electronics Industry Association (EIA) in conjunction with Bell systems, modem manufacturers, and computer terminal manufacturers. Its full name is the Technical Standard for Serial Binary Data Interchange Interface between Data Terminal Devices (DTE) and Data Communications Devices (DCE). The standard specifies a 25-pin DB25 connector.
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