Description
The Belimo SR24A-SR is a highly reliable modulating rotary actuator designed specifically for ball valves. Ideal for heating, ventilation, and air-conditioning systems, this actuator ensures precise control and high functional reliability. With easy direct mounting and adjustable angle of rotation, the SR24A-SR is built to provide efficient and maintenance-free operation.
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: 20 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: 45 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: 0.91 kg
Operating Mode: The actuator responds to a standard control signal of 0...10 V and drives to the corresponding position. Position feedback provides an electrical display of the valve position (0.5...100%) and can be used as a control signal for other actuators.
Simple Direct Mounting: Mounts directly on the ball valve with a single central screw. The assembly tool is integrated into the plug-in position indication, and the mounting orientation can be selected in 90° steps.
Manual Override: A push-button manual override allows the gear train to disengage while the button is pressed or remains locked.
Adjustable Angle of Rotation: Features mechanical end stops for adjustable angle of rotation.
High Functional Reliability: Overload protection and automatic stopping when the end stop is reached, eliminating the need for limit switches.
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: Ensure the parallel connection of other actuators follows performance data guidelines. Factory setting for direction of rotation is Y2.
Wire Colours: 1 = black, 2 = red, 3 = white, 5 = orange
Safety Notes
- Designed for stationary heating, ventilation, and air-conditioning systems. Not suitable for aircraft or other airborne transport.
- Outdoor use is possible only if protected from direct interference from seawater, snow, ice, and aggressive gases.
- Installation must be carried out by authorised specialists following all legal and institutional regulations.
- The direction of the rotation switch should only be operated by authorised specialists and should not be reversed in frost protection circuits.
Why Choose the Belimo SR24A-SR?
Ease of Installation: Quick and straightforward direct mounting on ball valves.
Versatile Control: Suitable for a wide range of applications with adjustable operating parameters.
Reliable Performance: High functional reliability with maintenance-free operation.
Comprehensive Support: Wide range of compatible accessories for enhanced functionality.
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.
