Understanding Binary Code in Electrical Systems

In the world of electronics and PLCs (Programmable Logic Controllers), binary code plays a vital role. It’s the fundamental language that machines use to communicate and process data. Everything from logic gates to microprocessors relies on binary.

Binary is a base-2 number system that uses only two digits: 0 and 1. In electrical systems:

• 0 usually represents OFF or no voltage (0V)
• 1 represents ON or the presence of voltage (e.g., 24V DC in control circuits)

In PLC programming, binary states are used in ladder logic to control outputs. For example, turning on a motor may be as simple as writing a logical 1 to an output address.

Understanding how binary translates to real-world signals is essential for any electrical apprentice working with automation, control circuits, or digital electronics.