Belimo NKQ24A-SR - rotary actuator for dampers with safety function

Belimo NKQ24A-SR

Rotary actuator for regulating dampers in technical building systems. The analogue Y signal determines the operating position, while voltage U is used for position indication. When the power supply is interrupted, energy stored in the capacitors moves the damper to the preset safety position.

Key features and specifications

• Motor torque: 6 Nm; air damper size: up to approx. 1.2 m².
• Rated voltage: AC/DC 24 V; frequency: 50/60 Hz.
• Modulating control: 2...10 V; position feedback signal: 2...10 V.
• Motor operating time: 4 s / 90°; safety function operating time: 4 s / 90°.
• Safety position: 0...100%, adjustable in 10% increments.
• Rotation angle: max. 95°; mechanical stops on both sides, minimum permitted angle 30°.
• Motor direction selected by 0/1 switch; manual adjustment by push-button.
• Universal clamp for shaft 8...26.7 mm; mechanical position indicator.
• Power and control cable: 1 m, 4x 0.75 mm².
• Power consumption during operation: 11 W; at rest: 3 W; sizing power: 22 VA.
• Degree of protection IEC/EN: IP54; protection class IEC/EN: III, Safety Extra-Low Voltage (SELV).
• Ambient temperature: -30...50°C [-22...122°F].

Setpoint range adaptation takes place automatically when the power is first switched on, or can be started using the push-button. After delivery, discharged capacitors require approximately 15 s of pre-charging before initial operation.