IO-Link Wireless Technology
Wireless Communication on The Factory Floor
Enabling Machines & Production Lines to Do More
IO-Link Wireless was developed as a global wireless communication standard designed to replace cables in remote sensor and actuator control and monitoring for factory automation. Based on the IO-Link IEC 61131-9 standard, it is a system extension to the already established IO-Link technology.
Similar to the original IO-Link protocol, IO-Link Wireless technology offers high reliability, low latency, scalability, deterministic communication, high client density capacity, and robustness, all in a wireless format. It is uniquely suited to meet the demands of Industry 4.0 and is already being implemented by some of the world’s largest automation equipment manufacturers and machine builders.
IO-Link Wireless enables connectivity at the factory-floor level, with seamless, vendor-agnostic, cable-free communication. It expands on the advantages of IO-Link by offering:
- A single wireless communication protocol for both control and monitoring
- Support for novel applications and systems (wireless control and sensing on transport track movers/rotary-tables/carousels, wireless intelligent tooling, wireless end-of-arm devices for robotics, etc.)
- Simple and cost-effective deployment for both retrofits and new-builds
- Enhanced flexibility and modularity

High Performance Industrial-Grade Wireless Communication
- Reliable
- Deterministic
- Fast
- Coexistence
- Scalable
- Industrial
To ensure low latency, this mechanism is implemented automatically and is controlled by the physical layer of the radio. IO-Link Wireless also uses the Gaussian Frequency Shift Keying (GFSK) modulation, which is an extremely robust modulation for dealing with interferences and noise.
Critical data is transmitted periodically in a deterministic manner. The deterministic attributes of IO-Link Wireless ensure the predictable properties of the network and enable algorithms that cannot be similarly applied with non-deterministic protocols such as Wi-Fi or Bluetooth.
The sub-cycles include a downlink portion which is broadcasted by the wireless master to all wireless devices on each track, and an uplink portion which is a single-cast time-multiplexing message sent to the master from the devices according to a predefined timeslot.
Frequency hopping is used to ensure adequate performance for an IO-Link Wireless system components and to reduce the impact of interferences. Frequency hopping alternates frequency channels for each transmission as a measure against interference, resulting with a PER of 1e-9 which is on par with wired connections.
All tracks of a Wireless Master communicate at the same time on different frequencies, providing an optimal medium utilization. An IO-Link Wireless Cell can support up to 3 Masters with 120 IO-Link Wireless Devices.
The key features of IO-Link Wireless technology are high reliability, low latency, scalability, deterministic communication, capability of dealing with a high density of clients, and robustness.