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EFB24-SR-S | Belimo Spring Return Damper Actuator 270 In Lb 24V With Auxiliary Switches
- Regular price
- $1,045.00
- Sale price
- $1,045.00
- Regular price
-
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Product Description P/N: EFB24-SR-S
Description
The Belimo EFB24-SR-S is a high-torque spring return damper actuator delivering 270 in-lb (30 Nm) for precise modulating airflow control in HVAC systems. It operates on AC/DC 24 V power and features integrated auxiliary switches for position indication and control sequencing.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | Actuators & Dampers |
| Part Number | EFB24-SR-S |
| 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) | 8 W |
| Power Consumption (Rest) | 4.5 W |
| Transformer Sizing | 14 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 | 270 in-lb (30 Nm) |
| Angle of Rotation | 35…95°, adjustable |
| Running Time (Motor) | 95 s / 90° |
| Running Time (Fail-Safe) | <20 s @ -20…50°C |
| Auxiliary Switches | 2x SPDT |
| Electrical Connection | Dual 18 GA cables, 1 m, 1/2" NPT |
| Degree of Protection | IP54 / NEMA 2 |
| Ambient Temperature | -30…50°C |
| Weight | 11 lb (5.2 kg) |
Information About EFB24-SR-S
The EFB24-SR-S is part of Belimo’s EFB series of spring return damper actuators designed for demanding HVAC airflow control applications. It incorporates electronic overload protection throughout the full rotation range and a double-insulated design to support safe and reliable operation. The actuator includes two factory-installed auxiliary switches to provide accurate position indication and support interlocking or safety-related control logic. Reversible fail-safe direction, selectable motor rotation, and adjustable mechanical end stops offer flexibility during installation and commissioning.
Key Features
- Spring Return Fail-Safe Operation: Integrated spring mechanism ensures automatic return to a predefined safety position during power loss for reliable system protection.
- High Torque Performance: Delivers a constant 270 in-lb (30 Nm) torque suitable for large or high-pressure air damper applications.
- Modulating Control Capability: Accepts a 2…10 V control signal with optional 4…20 mA configuration for precise proportional airflow regulation.
- Dual Auxiliary SPDT Switches: Includes two adjustable switches for damper position indication, sequencing, and safety interlocks.
- Electronic Overload Protection: Protects internal components throughout the full 0…95° rotation range against mechanical obstruction or overload.
- Manual Override Function: Supplied hex crank allows manual damper positioning during commissioning, testing, or maintenance.
- Adjustable Mechanical End Stops: Enable precise limitation of rotation angle to match damper requirements.
The EFB24-SR-S delivers the reliability and precision required for modulating airflow control with dependable fail-safe operation in HVAC systems.
Description
The Belimo EFB24-SR-S is a high-torque spring return damper actuator delivering 270 in-lb (30 Nm) for precise modulating airflow control in HVAC systems. It operates on AC/DC 24 V power and features integrated auxiliary switches for position indication and control sequencing.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | Actuators & Dampers |
| Part Number | EFB24-SR-S |
| 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) | 8 W |
| Power Consumption (Rest) | 4.5 W |
| Transformer Sizing | 14 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 | 270 in-lb (30 Nm) |
| Angle of Rotation | 35…95°, adjustable |
| Running Time (Motor) | 95 s / 90° |
| Running Time (Fail-Safe) | <20 s @ -20…50°C |
| Auxiliary Switches | 2x SPDT |
| Electrical Connection | Dual 18 GA cables, 1 m, 1/2" NPT |
| Degree of Protection | IP54 / NEMA 2 |
| Ambient Temperature | -30…50°C |
| Weight | 11 lb (5.2 kg) |
Information About EFB24-SR-S
The EFB24-SR-S is part of Belimo’s EFB series of spring return damper actuators designed for demanding HVAC airflow control applications. It incorporates electronic overload protection throughout the full rotation range and a double-insulated design to support safe and reliable operation. The actuator includes two factory-installed auxiliary switches to provide accurate position indication and support interlocking or safety-related control logic. Reversible fail-safe direction, selectable motor rotation, and adjustable mechanical end stops offer flexibility during installation and commissioning.
Key Features
- Spring Return Fail-Safe Operation: Integrated spring mechanism ensures automatic return to a predefined safety position during power loss for reliable system protection.
- High Torque Performance: Delivers a constant 270 in-lb (30 Nm) torque suitable for large or high-pressure air damper applications.
- Modulating Control Capability: Accepts a 2…10 V control signal with optional 4…20 mA configuration for precise proportional airflow regulation.
- Dual Auxiliary SPDT Switches: Includes two adjustable switches for damper position indication, sequencing, and safety interlocks.
- Electronic Overload Protection: Protects internal components throughout the full 0…95° rotation range against mechanical obstruction or overload.
- Manual Override Function: Supplied hex crank allows manual damper positioning during commissioning, testing, or maintenance.
- Adjustable Mechanical End Stops: Enable precise limitation of rotation angle to match damper requirements.
The EFB24-SR-S delivers the reliability and precision required for modulating airflow control with dependable fail-safe operation in HVAC systems.
