The Helios Fans KWL 45 SNH is an extension module designed to expand the KWL 45 STS-HS control set from 4 to 8 decentralized ventilation units. It operates with an input of 230 V AC at 50/60 Hz and provides an output of 12 V DC / 1.5 A. Supplied as a set of two modules, it is intended for installation within a distribution box. The output voltage complies with SELV (Safety Extra Low Voltage) protection class 3 standards, ensuring safe operation.