# IO-Link Wireless

Protocols · `IO-Link Wireless` · verification: source checked

IO-Link Wireless is a wireless version of IO-Link for factory control systems. It transmits sensor and actuator signals over virtual point-to-point radio connections between an IO-Link Master and star-connected IO-Link Devices. It uses the 2.4 GHz ISM band with time and frequency division multiplexing and keeps the same cyclic and acyclic application interfaces as wired IO-Link.

## Specification

| Property | Value |
|---|---|
| Transports | other |
| Architecture | master slave |
| Encoding | binary |

## Safety

- Operating limit: up to 3 Wireless Masters can coexist in the same airspace.
- Operating limit: each Wireless Master supports up to 40 Wireless Devices.
- Operating limit: maximum 120 Wireless Devices within a 20x20 meter production cell.
- Operating limit: 5 ms cycle time for 5 tracks per master transmitted in parallel.
- FDM channel hopping must be optimized and synchronized for all connected Devices to maximize reliability and minimize packet error rate.
- Uses the open 2.4 GHz ISM band divided into 80 1 MHz channels.

## Study notes

- IO-Link Wireless is based on standardized wired IO-Link technology.
- The application interfaces for cyclic and acyclic data are compatible with existing IO-Link descriptions.
- Programming and system design do not change compared with wired IO-Link.
- The architecture consists of an IO-Link Master and star-shaped connected IO-Link Devices.
- Single point-to-point connections are mapped virtually via radio.
- Virtual connections use a combination of time division multiplexing and frequency division multiplexing.
- 8 Devices are grouped into tracks (TDM); 5 tracks per master are transmitted in parallel (FDM).
- The document states no difference in processing wired IO-Link and IO-Link Wireless data.

## Sources

1. [IO-Link Wireless - Simple, Flexible, Reliable](https://io-link.com/technology/wireless) (accessed 2026-10-25)

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Source page: https://machineschema.com/protocol/io-link-wireless  
JSON: https://machineschema.com/protocol/io-link-wireless.json  
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