Logic Concept:

Represents binary states Logic 1 (ON) or Logic 0 (OFF).

Digital I/O Devices:

• Also known as discrete I/O devices.
• Operate in two states: ON or OFF.
• Connected to digital I/O channels.
• PLC interprets ON as Logic 1 and OFF as Logic 0.

Analog I/O Devices:

PLCs sense and generate analog values.

• Internally, PLCs convert these analog values to binary signals (ON or OFF).
• Correspond to Logic 1 (ON) and Logic 0 (OFF).