What is RS232 and What is it Used for?

Overview

This video explains RS232, one of the oldest and most widely used serial communication standards in industrial and electronic systems.

RS232 is used to transmit data bit by bit between two devices (point-to-point communication), typically between a computer and equipment like PLCs, modems, or instruments.

Despite being a legacy protocol, RS232 is still widely used due to its simplicity, reliability, and compatibility with industrial devices.

What You Will Learn

• What is RS232 communication
• How serial communication works (bit by bit transmission)
• RS232 connection basics (TX, RX, GND)
• Difference between RS232 and other protocols (RS485 / Ethernet)
• Advantages and limitations of RS232

Applications

• Communication between PLCs and industrial devices
• Connecting computers to modems and legacy equipment
• Configuration of routers, switches, and industrial devices
• Data acquisition from sensors and instruments
• Industrial automation and control systems
• Point-to-point communication between devices