Belimo NFG-S2-L - rotary actuator for dampers with safety function

Belimo NFG-S2-L – damper actuator

Rotary actuator with a safety function, designed to control dampers in stationary heating, ventilation and air conditioning systems. Particularly suitable for outdoor applications; the documentation specifies protection against UV radiation, rain, snow, dirt, dust and air humidity. If the power supply fails, the return spring moves the damper to the safety position.

Key features and specifications

• Torque of the motor and safety function: 10 Nm.
• Rated voltage: AC 24...240 V / DC 24...125 V; rated voltage frequency: 50/60 Hz.
• Control type: Close/Open.
• Motor running time: 75 s / 90°; safety function running time: <20 s @ -20...50°C, <60 s @ -30°C.
• Direction of rotation of the safety function: L (ccw).
• Auxiliary switches: 2x SPDT, 1x 10% / 1x 11...100%.
• Rotation angle: max. 95°, adjustable using mechanical stops.
• Mechanical connection: universal clamp 12...26.7 mm; mechanical position indicator.
• Manual override: using a crank and locking switch.
• Power consumption during operation: 6 W; in the rest position: 2.5 W; for cable sizing: 9.5 VA.
• Power and control connection: 1 m cable, 2x 0.75 mm², FRNC (halogen-free); auxiliary switch connection: 1 m cable, 6x 0.75 mm², FRNC (halogen-free).
• Protection rating: IP66/67; NEMA 4X; enclosure type: UL Enclosure Type 4X.
• Ambient temperature: -30...50°C [-22...122°F].

The device is not intended for corrosive environments or applications involving chemical effects from gases or liquids.