5-speed controller for air curtains with single-phase motors. The combined maximum motor current is 3,5 Amps. The air velocity can be selected via the 5-step rotary switch. In OFF position (zero), the motor is disabled. The TK monitoring function deactivates the motor in case of overheating. The digital input can be used for remote start-stop commands. After a power failure, the motor automatically restarts. The autotransformer technology generates a motor voltage with a perfect sinusoidal shape. This guarantees quiet motor operation. Only for voltage controllable motors.
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