NMB24-SR | Belimo Modulating Non Fail Safe Damper Actuator 90 In Lb 24V

Belimo · Motors & Motion

Description  The Belimo NMB24-SR is a non fail-safe damper actuator designed to deliver 90 in-lb (10 Nm) of torque for precise modulating airflow control. It operates on AC/DC 24 V power and supports a 2–10 V control signal with integrated position feedback for accurate damper positioning.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category Dampers & Actuators Part Number NMB24-SR Subcategory Damper Actuators Nominal Voltage AC/DC 24 V Nominal Frequency 50/60 Hz Voltage Range AC 19.2…28.8 V / DC 21.6…28.8 V Power Consumption (Operation) 1.5 W Power Consumption (Rest) 0.4 W Transformer Sizing 5 VA Control Signal 2…10 V (4…20 mA with resistor) Input Impedance 100 kΩ (2…10 V), 500 Ω (4…20 mA) Position Feedback 2…10 V Torque Output 90 in-lb (10 Nm) Angle of Rotation Max. 95°, adjustable Running Time (Motor) 95 s / 90° Electrical Connection 18 AWG plenum cable, 1/2" NPT Degree of Protection IP54 / NEMA 2 Noise Level 45 dB(A) Ambient Temperature -30…50°C Weight 2.2 lb (1.0 kg)   Information About NMB24-SR The NMB24-SR is part of Belimo’s NMB series of compact non fail-safe damper actuators developed for reliable modulating airflow control in commercial HVAC systems. It features electronic overload protection throughout the full 0–95° rotation range to protect internal components and maintain consistent torque output. The actuator supports standard 2…10 V control and can be adapted for 4…20 mA operation using an external resistor, allowing compatibility with a wide range of building automation systems. Its plenum-rated cabling, selectable direction of motion, and maintenance-free design support efficient installation and long-term dependable operation. Key Features Non Fail-Safe Operation: Provides powered damper positioning without spring return for applications where fail-safe action is not required. 10 Nm Constant Torque Output: Delivers stable 90 in-lb torque for accurate control of small to medium air dampers. Modulating Control Interface: Accepts a 2…10 V control signal with optional 4…20 mA configuration for precise proportional airflow regulation. Electronic Overload Protection: Protects the actuator across the entire rotation range to prevent damage from obstruction or excessive load. Integrated Position Feedback: Supplies a 2…10 V feedback signal for continuous damper position monitoring and closed-loop control. Selectable Direction Of Motion: Motor rotation direction can be configured via an onboard switch to match installation requirements. Manual Override Push Button: Allows local damper positioning during commissioning, testing, or maintenance without tools. The NMB24-SR delivers the reliability and precision required for accurate modulating airflow control in non fail-safe HVAC damper applications.

Brand: Belimo · Category: Motors & Motion

Key features

• Non Fail-Safe Operation: Provides powered damper positioning without spring return for applications where fail-safe action is not required.
• 10 Nm Constant Torque Output: Delivers stable 90 in-lb torque for accurate control of small to medium air dampers.
• Modulating Control Interface: Accepts a 2…10 V control signal with optional 4…20 mA configuration for precise proportional airflow regulation.
• Electronic Overload Protection: Protects the actuator across the entire rotation range to prevent damage from obstruction or excessive load.
• Integrated Position Feedback: Supplies a 2…10 V feedback signal for continuous damper position monitoring and closed-loop control.
• Selectable Direction Of Motion: Motor rotation direction can be configured via an onboard switch to match installation requirements.
• Manual Override Push Button: Allows local damper positioning during commissioning, testing, or maintenance without tools.

Specifications

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