IO-Link is a standardized, point-to-point industrial communication protocol (IEC 61131-9) that enables seamless connectivity between sensors, actuators, and automation systems. As an integral part of Industry 4.0, IO-Link enhances machine-to-machine communication, improves diagnostics, and simplifies system integration in smart manufacturing environments.

How IO-Link Works
IO-Link operates using a Master-Slave architecture:

IO-Link Master: Interfaces between the control system (PLC, DCS, or SCADA) and connected IO-Link devices.

IO-Link Device (Slaves): Sensors, actuators, and other field devices that communicate with the master.

Standard 3-Wire Cable: Uses unshielded cables up to 20 meters, reducing costs and complexity.

Unlike traditional industrial sensors that provide only binary (on/off) signals, IO-Link-enabled devices transmit real-time process data, diagnostics, and configuration parameters for advanced automation control.