EFX24-S N4H | Belimo 270 In Lb Spring Return On Off Damper Actuator With Heater NEMA 4H

Belimo · Motors & Motion

Description  The Belimo EFX24-S N4H is a high-torque spring return damper actuator designed for on/off control in demanding HVAC and industrial environments. It operates on AC/DC 24 V, delivers 270 in-lb of torque, and includes an integrated heater for reliable performance in low-temperature conditions.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category Actuators & Dampers Part Number EFX24-S N4H Subcategory Damper Actuators Actuator Type Spring return, on/off, with heater Nominal Torque 270 in-lb (30 Nm) 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 (Running) 9.5 W Power Consumption (Rest) 4.5 W Heater Power Consumption 21 W Transformer Sizing 16 VA Auxiliary Switches 2 × SPDT Angle of Rotation Adjustable 35…95° Running Time 75 s / 90° Fail-Safe Running Time <20 s Electrical Connection Terminal blocks in junction box Degree of Protection NEMA 4 / NEMA 4H Ambient Temperature -22…122°F (-30…50°C) Weight 10 lb (4.7 kg)   Information About EFX24-S N4H The EFX24-S N4H is part of Belimo’s heavy-duty spring return damper actuator family developed for harsh and low-temperature environments. It features an integrated heater that ensures consistent operation in cold climates, reducing the risk of condensation or mechanical binding. The actuator operates on AC/DC 24 V power and provides reliable on/off control with automatic spring return positioning during power loss. Its sealed NEMA 4H enclosure, double-insulated construction, and electronic overload protection support maintenance-free operation in outdoor, wash-down, and industrial HVAC applications. Key Features High Torque Spring Return Actuation: Delivers 270 in-lb (30 Nm) of torque to reliably operate large or high-resistance dampers. Integrated Heater Option: Built-in heater maintains internal operating temperature, ensuring dependable performance in cold or humid environments. Fail-Safe Spring Return Function: Automatically drives the damper to a predefined safety position during power loss. On Off Control Operation: Designed for straightforward open and close damper control in isolation and safety applications. Dual Auxiliary Switches: Two SPDT switches provide configurable end-position indication and interlocking with control systems. Rugged Environmental Protection: NEMA 4H enclosure protects against moisture, dust, and harsh outdoor conditions. Service-Friendly Design: Manual override and electronic overload protection support safe commissioning and long-term reliability. The EFX24-S N4H delivers the reliability and precision required for high-torque, fail-safe damper control in extreme environmental conditions.

Brand: Belimo · Category: Motors & Motion

Key features

• High Torque Spring Return Actuation: Delivers 270 in-lb (30 Nm) of torque to reliably operate large or high-resistance dampers.
• Integrated Heater Option: Built-in heater maintains internal operating temperature, ensuring dependable performance in cold or humid environments.
• Fail-Safe Spring Return Function: Automatically drives the damper to a predefined safety position during power loss.
• On Off Control Operation: Designed for straightforward open and close damper control in isolation and safety applications.
• Dual Auxiliary Switches: Two SPDT switches provide configurable end-position indication and interlocking with control systems.
• Rugged Environmental Protection: NEMA 4H enclosure protects against moisture, dust, and harsh outdoor conditions.
• Service-Friendly Design: Manual override and electronic overload protection support safe commissioning and long-term reliability.

Specifications

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