Click on the button 
to access the configuration window for activating relays on the GPI card.
Use IO reaction? : Activate the relays of the GPI card.
Use output number : used to enter the number of the relay (s) to be pasted on action. Separate the numbers by a "; "
Auto reinitialize after : used to inform the return to the initial state of the relays after x seconds. If this option is not checked, it will be necessary to press the button "Reinitialize" of the application so that they return to the initial state.
Confirm the settings with the "OK" button, or cancel with the "Cancel" button.