EFB24-SR-S N4 | Belimo 270 In Lb Spring Return Modulating Damper Actuator NEMA 4X

Belimo · Motors & Motion

Description  The Belimo EFB24-SR-S N4 is a high-torque spring return damper actuator delivering 270 in-lb of force for precise modulating airflow control. Operating on AC/DC 24 V with 2…10 VDC control, it provides reliable fail-safe performance in demanding HVAC and industrial environments.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category Actuators & Dampers Part Number EFB24-SR-S N4 Subcategory Damper Actuators Actuator Type Spring return, modulating Nominal Torque 270 in-lb (30 Nm) Nominal Voltage AC/DC 24 V Control Signal 2…10 VDC (4…20 mA compatible) Power Consumption (Running) 8 W Power Consumption (Holding) 4.5 W Auxiliary Switches 2 × SPDT Electrical Connection Internal terminal blocks in junction box Degree of Protection IP66 Enclosure Rating NEMA 4X / UL Type 4 Operating Temperature -22…122°F (-30…50°C) Weight 10.0 lb   Information About EFB24-SR-S N4 The EFB24-SR-S N4 is part of Belimo’s heavy-duty spring return damper actuator series designed for applications requiring high torque and environmental protection. It features a robust enclosure rated IP66 and NEMA 4X, allowing installation in wash-down areas, outdoor locations, and harsh mechanical spaces. The actuator operates on AC/DC 24 V and supports modulating control with 2…10 VDC signals, while also accommodating 4…20 mA control through compatible interfaces. With integrated auxiliary switches and maintenance-free construction, it delivers dependable long-term performance in critical airflow control systems. Key Features High Torque Spring Return Actuation: Provides 270 in-lb (30 Nm) of torque to reliably drive large or high-resistance dampers under load. Fail-Safe Spring Return Function: Automatically moves the damper to a predefined safety position during power loss to support system protection. Precise Modulating Control Capability: Supports 2…10 VDC modulation with compatibility for 4…20 mA control, enabling accurate airflow regulation. Dual Auxiliary Switches: Two integrated SPDT switches allow configurable end-position indication and interlocking with other control equipment. Rugged Environmental Protection: IP66 and NEMA 4X enclosure ratings ensure resistance to dust, moisture, and harsh operating conditions. Industrial-Grade Electrical Connections: Internal junction box with terminal blocks and knockouts simplifies secure field wiring. Maintenance-Free Design: Engineered for continuous-duty operation without routine servicing requirements. The EFB24-SR-S N4 delivers the reliability and precision required for high-torque, fail-safe damper control in commercial and industrial HVAC applications.

Brand: Belimo · Category: Motors & Motion

Key features

• High Torque Spring Return Actuation: Provides 270 in-lb (30 Nm) of torque to reliably drive large or high-resistance dampers under load.
• Fail-Safe Spring Return Function: Automatically moves the damper to a predefined safety position during power loss to support system protection.
• Precise Modulating Control Capability: Supports 2…10 VDC modulation with compatibility for 4…20 mA control, enabling accurate airflow regulation.
• Dual Auxiliary Switches: Two integrated SPDT switches allow configurable end-position indication and interlocking with other control equipment.
• Rugged Environmental Protection: IP66 and NEMA 4X enclosure ratings ensure resistance to dust, moisture, and harsh operating conditions.
• Industrial-Grade Electrical Connections: Internal junction box with terminal blocks and knockouts simplifies secure field wiring.
• Maintenance-Free Design: Engineered for continuous-duty operation without routine servicing requirements.

Specifications

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