Description
The Belimo NR24A-SR is a high-performance modulating rotary actuator designed specifically for ball valves. With its robust construction and precise control capabilities, this actuator is ideal for various HVAC applications, ensuring reliable operation and efficient system performance.
Electrical Data
- Nominal Voltage: AC/DC 24 V
- Nominal Voltage Frequency: 50/60 Hz
- Nominal Voltage Range: AC 19.2...28.8 V / DC 19.2...28.8 V
- Power Consumption in Operation: 2.5 W
- Power Consumption in Rest Position: 0.4 W
- Power Consumption for Wire Sizing: 5 VA
- Connection Supply / Control: Cable 1 m, 4x 0.75 mm²
- Parallel Operation: Yes (note the performance data)
Functional Data
- Torque Motor: 10 Nm
- Operating Range Y: 2...10 V
- Input Impedance: 100 kΩ
- Position Feedback U: 2...10 V
- Position Feedback U Note: Max. 1 mA
- Position Accuracy: ±5%
- Manual Override: With push-button, can be locked
- Running Time Motor: 90 s / 90°
- Sound Power Level, Motor: 35 dB(A)
- Position Indication: Mechanical, pluggable
Safety Data
- Protection Class IEC/EN: III, Safety Extra-Low Voltage (SELV)
- Power Source UL: Class 2 Supply
- Degree of Protection IEC/EN: IP54
- Degree of Protection NEMA/UL: NEMA 2
- Enclosure UL: Enclosure Type 2
- EMC: CE according to 2014/30/EU
- Certification IEC/EN: IEC/EN 60730-1 and IEC/EN 60730-2-14
- UL Approval: cULus according to UL60730-1A, UL60730-2-14 and CAN/CSA E60730-1
- Type of Action: Type 1
- Rated Impulse Voltage Supply / Control: 0.8 kV
- Pollution Degree: 3
- Ambient Humidity Max.: 95% RH, non-condensing
- Ambient Temperature: -30...50°C [-22...122°F]
- Storage Temperature: -40...80°C [-40...176°F]
- Servicing: Maintenance-free
- Weight: 0.75 kg
Operating Mode: Connects with a standard control signal of 0...10 V, drives to the position defined by the control signal. Measuring voltage U serves for the electrical display of the valve position (0.5...100%) and as a control signal for other actuators.
Simple Direct Mounting: Straightforward direct mounting on the ball valve with only one central screw. The assembly tool is integrated into the plug-in position indication. The mounting orientation in relation to the ball valve can be selected in 90° steps.
Manual Override: Manual override with push-button possible. The gear train is disengaged for as long as the button is pressed or remains locked.
Adjustable Angle of Rotation: Adjustable angle of rotation with mechanical end stops.
High Functional Reliability: Overload protected, requires no limit switches, and automatically stops when the end stop is reached.
Accessories
- Auxiliary Switch 1x SPDT Add-On: S1A
- Auxiliary Switch 2x SPDT Add-On: S2A
- Feedback Potentiometer 140 Ω Add-On: P140A
- Feedback Potentiometer 1 kΩ Add-On: P1000A
- Feedback Potentiometer 10 kΩ Add-On: P10000A
Electrical Installation: Supply from isolating transformer. Parallel connection of other actuators possible. Observe the performance data. Direction of rotation switch is covered. Factory setting: Direction of rotation Y2.
Wire Colours: 1 = black, 2 = red, 3 = white, 5 = orange
Safety Notes
- Designed for use in stationary heating, ventilation, and air-conditioning systems.
- Outdoor application only possible if no (sea) water, snow, ice, insolation, or aggressive gases interfere directly with the device, and ambient conditions remain within specified thresholds.
- Installation must be carried out by authorised specialists.
- The direction of rotation switch must be operated only by authorised specialists and must not be reversed in a frost protection circuit.
- The device may only be opened at the manufacturer's site and contains no user-serviceable parts.
- Disposal of the device must adhere to local regulations.
For more information and to explore our range of Belimo products, visit our website at https://ecospares.co.uk/collections/belimo. If you need any assistance, please contact us.
