BELIMO NFA S2 10NM Rotary actuator fail-safe, 10 Nm, AC 24…240 V / DC 24…125
The BELIMO NFA-S2-10NM is a high-performance, non-spring return (fail-safe) rotary actuator designed for precise and reliable control in building automation and HVAC systems. Engineered for durability and ease of use, this actuator delivers a powerful 10 Newton-meter (Nm) torque to operate ball valves and dampers with exceptional accuracy.
Its key feature is the electromechanical fail-safe function, which drives the actuator to a predefined safe position (open or closed) in the event of a power or signal failure, ensuring system safety and protection. With a universal input voltage of 24…240 V AC/DC, it offers maximum flexibility for global applications and simplifies inventory management.
Key Features & Benefits
-
Electromechanical Fail-Safe:Â Guarantees a safe, predefined actuator position during power loss, protecting your HVAC system and environment. No need for external UPS units in most cases.
-
High Torque Output (10 Nm):Â Provides ample force to reliably operate larger ball valves and dampers, ensuring tight shut-off and precise modulation.
-
Universal Power Supply (24…240V AC/DC):Â Simplifies installation and stock-keeping by working with virtually any common control voltage worldwide.
-
Multiple Control Signals: Compatible with standard 0-10 V DC, 2-10 V DC, and 3-position (floating) control signals, offering seamless integration with most building management systems (BMS) and controllers.
-
Manual Override:Â Features a built-in manual override button with a visual position indicator, allowing for easy commissioning, testing, and manual control without the need for tools.
-
Robust & Long-Lasting:Â Built with a metal gearbox and high-quality materials for a long mechanical service life and reliable operation in demanding conditions.
-
Easy Installation:Â Standard ISO 5211 mounting interface ensures compatibility with a wide range of ball valves and dampers. Clear wiring terminals and a compact design simplify the installation process.
Technical Specifications
| Specification | Details |
|---|---|
| Product Family | BELIMO NFA-S2 Series |
| Actuator Type | Rotary, Electromechanical Fail-Safe (Non-Spring Return) |
| Torque | 10 Newton-meter (Nm) |
| Power Supply | Universal 24…240 V AC, 50/60 Hz / 24…125 V DC |
| Control Signal | 0-10 V DC / 2-10 V DC / 3-Position (Floating) |
| Running Time | 150 seconds (for 90° rotation) |
| Mounting | ISO 5211 Direct Mounting |
| Adjustable Angle | 30° to 120° (for damper applications) |
| Ambient Temperature | -20 °C to +60 °C |
| Protection Class | IP54 (Dust and water splashes protected) |
| Manual Override | Yes, with position indicator |
| Electrical Connection | Plug-in terminal block |
| Housing Material | Polycarbonate |
Applications
The NFA S2 10NM actuator is ideal for a wide range of applications, including:
-
Control of 2-way and 3-way ball valves in heating, cooling, and domestic hot water systems.
-
Operation of ventilation and fire/smoke dampers where fail-safe action is critical.
-
Air handling units (AHUs) and fan coil units (FCUs).
-
Energy management and building automation systems.
