The Helios MWS 7.5 is a robust five-step speed controller designed for surface installation, enabling precise control of ventilation fans with built-in thermal contacts. It includes a terminal block for safe connection of one or more fans, ensuring reliable operation.
With selectable output voltages of 0, 80, 100, 130, 170, and 230 volts, the MWS 7.5 features a step switch, built-in safety tripping mechanism, and a clear control lamp for status indication. In the event of a fault, the unit can be manually reset by switching to position “0.” Housed in a durable IP54-rated polymer enclosure, it supports ambient temperatures up to 40 °C, offering a dependable solution for ventilation systems requiring controlled speed regulation.