IO-Link solutions

• Two-way digital communication between IO-Link devices (e.g., sensors/actuators) and an IO-Link master, allowing both value reading and parameter/command transfer.
• Standardised access to device data, typically including:
  • Process data (what the device measures or outputs)
  • Service data (device information and configuration)
  • Event data (diagnostics and alerts)
• Centralised parameter handling via the IO-Link master, where settings can be stored and automatically written back.
• Fast device replacement (plug & play) using a shared connector for power and communication, with automatic re-parameterisation from the master.
• Enhanced maintenance diagnostics, enabling continuous status monitoring to detect issues sooner.
• Straightforward, standard wiring based on a 24 V signal, with no need for shielded cables.
• Remote access and configuration from the control system (PC/PLC), making it easier to change settings and reduce downtime.

No, IO-Link is not an Ethernet-based protocol. IO-Link is a point-to-point communication standard used at sensor and actuator level, linking devices directly to an IO-Link master via standard sensor cables and a 24 V power supply. The IO-Link master then serves as a gateway, forwarding the collected data to higher-level systems such as PLCs, HMIs, or industrial networks (e.g., PROFINET or EtherNet/IP).

An IO-Link master serves as the bridge between IO-Link devices (such as sensors and actuators) and higher-level automation systems, including PLCs or industrial networks (e.g., PROFINET or EtherNet/IP). It controls communication, retains device parameters, and supports diagnostic, monitoring, and condition-check functions.

Modbus and IO-Link are used for different roles in industrial automation.

• IO-Link is intended for device-level communication, mainly for sensors and actuators. It supports bidirectional data exchange, parameterisation, and detailed diagnostics at component level.
• Modbus is a fieldbus communication protocol typically used for exchanging data between controllers, HMIs, and devices at a higher system level.

IO-Link is well suited to smart manufacturing scenarios where real-time device data, diagnostics, and quick device replacement matter, while Modbus is often chosen for more straightforward communication between control systems.

IO-Link is a point-to-point communication standard for sensors and actuators, whereas fieldbus systems work at the controller or network level. It complements fieldbuses by providing detailed device data, parameterisation, and diagnostics without requiring changes to existing PLC or fieldbus infrastructures.

An IO-Link hub lets several standard digital sensors or actuators share a single IO-Link port. It is particularly useful where many basic ON/OFF devices are used, as it simplifies wiring and reduces cabinet space while still supporting centralised diagnostics.

Yes. Many SMC IO-Link devices feature high ingress protection ratings (IP65, IP67, or IP69K), making them suitable for harsh environments such as wash-down zones, food production areas, or outdoor installations.