# Writing data to the output of the device

The IO write node allows to write message data to the digital output of the device.

1. Open Node-RED.
2. Add an IO write node from the Weidmüller category to the workspace.
3. Add more nodes to the workspace and connect them to a flow with the IO write node being the last node.

1. After deploying the flow, the IO write node is triggered whenever it receives a message at its input. The message data is written to the digital output of the device.