The module is designed to protect electric devices from overvoltage by disconnecting the connected loads.
Three possible tolerance values are envisaged: low, medium, high.
Passive protection (gas discharge tube and varistor) against electrical fast transients (voltage surges).
The module must be installed upstream of the control device.

Compatible with all the device with single-phase power supply, incleded Sirio, Sirio Entry and Sirio Entry XP