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NFA Fail-Safe Actuator

NFA Series, rotary actuators designed for fail-safe adjustment of dampers in technical building installations. Engineered for reliability and precision, these actuators are capable of efficiently controlling air damper sizes up to approximately 2 m², ensuring optimal airflow regulation in HVAC systems.

Key Features:

  1. Powerful Performance: Equipped with a torque motor delivering 10 Nm of torque, the NFA Series ensures robust and efficient operation, even in demanding applications.

  2. Wide Voltage Range: With a nominal voltage range of AC 24...240 V / DC 24...125 V, these actuators offer versatility and compatibility with various power sources, ensuring reliable performance across different electrical systems.

  3. Control Options: Designed for open/close control, these actuators provide precise adjustment capabilities, allowing for seamless integration into building automation systems for enhanced efficiency and comfort.

Technical Data:

  • Electrical Data: Nominal voltage frequency of 50/60 Hz, with a nominal voltage range of AC 19.2...264 V / DC 21.6...137.5 V, ensuring stable and consistent power supply.

  • Power Consumption: Operates at 6 W during operation, 2.5 W in rest position, and requires 9.5 VA for wire sizing, ensuring energy-efficient performance.

  • Connection: Features a supply/control cable of 1 m length with 2x 0.75 mm², providing convenient installation and connectivity options.

Functional Data:

  • Direction of Motion: Motor direction and fail-safe direction are selectable by mounting, offering flexibility in installation and configuration.

  • Manual Override: Includes a hand crank and locking switch for manual override, ensuring reliability and accessibility in case of power failure or maintenance requirements.

  • Angle of Rotation: Offers a maximum angle of rotation of 95°, with adjustable settings starting at 33% in 2.5% steps, allowing for precise control and customization.

  • Running Time: Motor has a running time of 75 s / 90°, while fail-safe operation takes less than 20 s at -20...50°C and less than 60 s at -30°C, ensuring quick response and efficiency.

  • Mechanical Interface: Features a universal shaft clamp compatible with shaft sizes ranging from 10 to 25.4 mm, providing versatility and ease of installation.

  • Position Indication: Equipped with mechanical position indication for easy monitoring and maintenance.

Service Life: Offers a minimum of 60,000 fail-safe positions, ensuring long-term reliability and performance in building automation systems.

    Part Numbers:
    NFA - Rotary actuator fail-safe, 10 Nm, AC 24...240 V / DC 24...125 V, Open/close, 75 s, IP54

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    Total price $587.40

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