Technical data sheet LMC24A-SR
www.belimo.com LMC24A-SR • en-gb • 2023-12-13 • Subject to change 1 / 4
Modulating damper actuator for adjusting dampers in technical building installations
• Air damper size up to approx. 1 m²
• 5 Nm motor torque
• Rated 24V AC/DC voltage
• Control modulating 2...10 V
• Position feedback 2...10 V
• Running time motor 35 s
Technical data
Electrical data Nominal voltage AC/DC 24V
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 1.5 W
Power consumption in rest position 0.4 W
Power consumption for wire sizing 3 VA
Connection supply / control Cable 1 m, 4x 0.75 mm²
Parallel operation Yes (note the performance data)
Functional data
Motor torque 5 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%
Direction of motion motor selectable with switch 0/1
Direction of motion note Y = 0 V: At switch position 0 (ccw rotation) / 1 (cw rotation)
Manual override with push-button, can be locked
Angle of rotation Max. 95°
Angle of rotation note can be limited on both sides with adjustable mechanical end stops
Running time motor 35 s / 90°
Sound power level, 45 dB(A) motor
Mechanical interface Universal shaft clamp 6...20 mm
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
Technical data sheet LMC24A-SR
www.belimo.com LMC24A-SR • en-gb • 2023-12-13 • Subject to change 2 / 4
Safety data UL Approval cULus according to UL60730-1A, UL60730-2-14 and CAN/CSA E60730-1
The UL marking on the actuator depends on the production site, the device is UL-compliant in any case
Hygiene test According to VDI 6022 Part 1 / SWKI VA 104-01, cleanable and disinfectable, low emission
Type of action Type 1
Rated pulse 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 Weight 0.48 kg
Safety notes
This device has been designed for use in stationary heating, ventilation and air-conditioning systems and must not be used outside the specified field of application, especially in aircraft or in any other airborne means of transport.
Outdoor application: only possible in case that no (sea) water, snow, ice, insolation or aggressive gases interfere directly with the device and that it is assured that the ambient conditions remain within the thresholds according to the data sheet at any time.
Only authorized specialists may carry out installation. All applicable legal or institutional installation regulations must be complied with during installation.
The device may only be opened at the manufacturer's site. It does not contain any parts that can be replaced or repaired by the user.
Cables must not be removed from the device.
To calculate the torque required, the specifications supplied by the damper manufacturers concerning the cross-section and the design, as well as the installation situation and the ventilation conditions must be observed.
The device contains electrical and electronic components and must not be disposed of as household refuse. All locally valid regulations and requirements must be observed.
Product features
Operating mode The actuator is connected with a standard control signal of 0...10 V and drives to the position defined by the control signal. Measuring voltage U serves for the electrical display of the damper position 0...100% and as control signal for other actuators.
Simple direct mounting Simple direct mounting on the damper shaft with a universal shaft clamp, supplied with an anti-rotation device to prevent the actuator from rotating.
Manual override Manual override with push-button possible