Spring return actuator for dampers, torque 20 Nm, timing 75s/90°, rotation angle 95°, AC power supply 24...240 V / /DC 24...125 V, control signal On/Off, auxiliary contacts 2 x SPDT (1 x fixed 10% / 1 x adjustable 10 ... 90%), for air dampers up to approx. 4 m².