What is IO-Link Wireless?
IO-Link Wireless is a wireless industrial communication standard based on the wired IO-Link protocol. It is specifically developed for use with Sensors and Actuators in factory environments, combining the advantages of wireless flexibility with the reliability and real-time performance of industrial networks.
IO-Link Wireless is ideal for applications where cabling is impractical or unreliable, such as on moving parts or in hard-to-reach Zones.
🧠 How does IO-Link Wireless work?
- Point-to-point structure (like IO-Link)
- Master ↔ device communication via wireless channels
- Up to 5 masters, each with a maximum of 8 devices
- Wireless technology
- Based on the 2.4 GHz ISM band
- Real-time performance: <5 ms latency, >99.999% reliability
- Use of frequency hopping & time division multiple access (TDMA)
- Interference mitigation
- Compatible with other wireless protocols such as Wi-Fi and Bluetooth
- Operates safely alongside existing networks
The architecture of IO-Link Wireless guarantees stable communication in harsh industrial environments.
🏭 Applications in industrial networks
- Moving machines (e.g. robotic arms, rotating machines)
- Mobile platforms (AGVs, shuttles, conveyors)
- Sensors in highly contaminated or hazardous environments
- Retrofitting legacy machines without cable modifications
- Applications in assembly lines, packaging, intralogistics
IO-Link Wireless makes installations more flexible, faster and easier to maintain.
🔍 IO-Link Wireless vs. IO-Link vs. other protocols
| Feature | IO-Link Wireless | IO-Link (wired) | WirelessHART |
|---|---|---|---|
| Communication | Wireless, 2.4 GHz ISM | Point-to-point via cable | Wireless mesh network |
| Real-time | <5 ms | <1 ms | 100 ms (typical) |
| Reliability | >99.999% | Very high | High, depending on the mesh |
| Mobile applications | ✅ Excellent fit | ❌ Impractical | ❌ Limited fit |
| Installation simplicity | ✅ Cable-free | ❌ Limited | ❌ More complex |
🔐 Security aspects
- AES-128 encryption for secure wireless communication
- Protection against jamming and interference via frequency hopping
- Per-device Access Control possible via the master
- Per-zone and per-channel segmentation for additional isolation
- Can be integrated with Cybersecurity measures such as network segmentation
IO-Link Wireless combines performance with modern wireless security requirements.
📌 In summary
IO-Link Wireless is a powerful solution for wireless Sensor and actuator communication, designed for industrial automation with high reliability and low Latency. Ideal for moving and hard-to-cable applications.