Belimo CQKB24-SR-RR Actuator
The Belimo CQKB24-SR-RR is a direct-coupled electronic fail-safe actuator engineered for high-performance modulation in HVAC zone control. Operating on a 24VAC/DC power supply, this actuator utilizes a 2 to 10 VDC or 4 to 20 mA proportional control signal to provide precise positioning for CQ series pressure-dependent zone valves. The internal supercapacitor technology ensures the valve returns to its fail-safe position (Normally Closed) during power loss, offering a reliable alternative to mechanical spring returns. With a 22 in-lb torque rating and a 75-second run time, it is designed for consistent flow control in commercial hydronic systems. The NEMA 2 (IP40) rated enclosure and 3-foot cable simplify installation in plenum spaces. This Belimo fail-safe actuator eliminates the need for field-adjustable switches by employing a brushless DC motor, which prevents motor burnout and ensures long-term operational stability for facility contractors.
Technical Key Benefits- Precise Proportional Control: Accepts a 2-10 VDC signal for accurate modulation of zone valve flow rates.
- Advanced Fail-Safe Logic: Integrated supercapacitor provides a reliable normally closed power-off position without mechanical fatigue.
- Energy Efficient Operation: Features a 2.5W power consumption during movement and 0.5W in holding mode.
- Contractor-Friendly Installation: Compact NEMA 2 housing fits tight mechanical spaces with a simple direct-coupled mounting interface.
- Motor Protection: Brushless DC technology includes electronic stall detection to prevent hardware failure at end-of-stroke.
How do I wire the control signal for 4-20 mA instead of 2-10 VDC?
A 500? resistor must be installed in parallel with the input signal to convert the current signal to the required voltage range for the actuator logic.
What is the difference between this and a standard spring-return model?
This model uses electronic storage (supercapacitors) to drive the motor to the fail-safe position, which allows for a more compact footprint and avoids the mechanical wear associated with springs.
Can this actuator be mounted in any orientation?
The unit is designed for upright or horizontal mounting; however, it should not be mounted upside down to maintain the NEMA 2 rating integrity against moisture.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Belimo CQKB24-SR-RR Actuator
The Belimo CQKB24-SR-RR is a direct-coupled electronic fail-safe actuator engineered for high-performance modulation in HVAC zone control. Operating on a 24VAC/DC power supply, this actuator utilizes a 2 to 10 VDC or 4 to 20 mA proportional control signal to provide precise positioning for CQ series pressure-dependent zone valves. The internal supercapacitor technology ensures the valve returns to its fail-safe position (Normally Closed) during power loss, offering a reliable alternative to mechanical spring returns. With a 22 in-lb torque rating and a 75-second run time, it is designed for consistent flow control in commercial hydronic systems. The NEMA 2 (IP40) rated enclosure and 3-foot cable simplify installation in plenum spaces. This Belimo fail-safe actuator eliminates the need for field-adjustable switches by employing a brushless DC motor, which prevents motor burnout and ensures long-term operational stability for facility contractors.
Technical Key Benefits- Precise Proportional Control: Accepts a 2-10 VDC signal for accurate modulation of zone valve flow rates.
- Advanced Fail-Safe Logic: Integrated supercapacitor provides a reliable normally closed power-off position without mechanical fatigue.
- Energy Efficient Operation: Features a 2.5W power consumption during movement and 0.5W in holding mode.
- Contractor-Friendly Installation: Compact NEMA 2 housing fits tight mechanical spaces with a simple direct-coupled mounting interface.
- Motor Protection: Brushless DC technology includes electronic stall detection to prevent hardware failure at end-of-stroke.
How do I wire the control signal for 4-20 mA instead of 2-10 VDC?
A 500? resistor must be installed in parallel with the input signal to convert the current signal to the required voltage range for the actuator logic.
What is the difference between this and a standard spring-return model?
This model uses electronic storage (supercapacitors) to drive the motor to the fail-safe position, which allows for a more compact footprint and avoids the mechanical wear associated with springs.
Can this actuator be mounted in any orientation?
The unit is designed for upright or horizontal mounting; however, it should not be mounted upside down to maintain the NEMA 2 rating integrity against moisture.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Product Information
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Description
The Belimo CQKB24-SR-RR is a direct-coupled electronic fail-safe actuator engineered for high-performance modulation in HVAC zone control. Operating on a 24VAC/DC power supply, this actuator utilizes a 2 to 10 VDC or 4 to 20 mA proportional control signal to provide precise positioning for CQ series pressure-dependent zone valves. The internal supercapacitor technology ensures the valve returns to its fail-safe position (Normally Closed) during power loss, offering a reliable alternative to mechanical spring returns. With a 22 in-lb torque rating and a 75-second run time, it is designed for consistent flow control in commercial hydronic systems. The NEMA 2 (IP40) rated enclosure and 3-foot cable simplify installation in plenum spaces. This Belimo fail-safe actuator eliminates the need for field-adjustable switches by employing a brushless DC motor, which prevents motor burnout and ensures long-term operational stability for facility contractors.
Technical Key Benefits- Precise Proportional Control: Accepts a 2-10 VDC signal for accurate modulation of zone valve flow rates.
- Advanced Fail-Safe Logic: Integrated supercapacitor provides a reliable normally closed power-off position without mechanical fatigue.
- Energy Efficient Operation: Features a 2.5W power consumption during movement and 0.5W in holding mode.
- Contractor-Friendly Installation: Compact NEMA 2 housing fits tight mechanical spaces with a simple direct-coupled mounting interface.
- Motor Protection: Brushless DC technology includes electronic stall detection to prevent hardware failure at end-of-stroke.
How do I wire the control signal for 4-20 mA instead of 2-10 VDC?
A 500? resistor must be installed in parallel with the input signal to convert the current signal to the required voltage range for the actuator logic.
What is the difference between this and a standard spring-return model?
This model uses electronic storage (supercapacitors) to drive the motor to the fail-safe position, which allows for a more compact footprint and avoids the mechanical wear associated with springs.
Can this actuator be mounted in any orientation?
The unit is designed for upright or horizontal mounting; however, it should not be mounted upside down to maintain the NEMA 2 rating integrity against moisture.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
