Rotary actuator for control of air dampers with fail-safe function in case of power failure. Designed for use in ventilation and air conditioning applications to regulate the passage of air through ducts. The emergency function is provided by a return spring which is under tension in constant tension. In the event of a power failure, the spring automatically resets the drive to a safe position .

Properties:

• torque 4 Nm
• damper size approx. 0.6 m2,
• rotation angle 90 degrees
• adjustment time 60 s
• spring closing 15 s
• 3-point control
• 2 auxiliary contacts
• IP54 protection
• dimensions 123.8 mm (l) x 72 mm (w) x 62.5 mm (h)

Advantages:

• fail-safe function of the return spring
• reliable motors that can handle any load
• overload resistant
• does not require a position limit switch
• does not require maintenance
• quiet operation
• including mounting bracket
• mechanical position indicator