LRF24-MP Spring-return actuator NC, 4 Nm, AC/DC 24 V - Belimo | ideal for ball valves

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The Belimo LRF24-MP is a kind of Actuator used in HVAC applications and air ventilation systems.

The Torque used by the LRF24-MP is 4 Nm.

The power supply requested for this Rotary Actuator is 24Vac/Vdc.

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If you are unsure about size or installation, refer to the Belimo custom datasheet above or message iacs to receive special instructions and a custom quote.

LRF24-MP Spring-return Actuator NC, 4 Nm, AC/DC 24 V

• 4 Nm, AC/DC 24 V, modulating, MP-Bus 75…300s
• Operating range DC 2...10 V, 0...32 V adjustable
• Position feedback DC 2...10 V, 0...10 V, adjustable
• IP54, manual override
• Connection cable PVC 1m
• Selectable direction of rotation (right/left)

Principle of operation: Conventional operation: The actuator is connected with a standard modulating signal DC 0...10 V. The actuator moves the valve to the operating position at the same time as tensioning the return spring. The valve is turned back to the emergency position by spring force when the supply voltage is interrupted. Operation on the MP-Bus: The actuator receives its digital positioning signal from the higher level controller via the MP-Bus and travels to the position defined. Connection U serves as communication interface and does not supply an analogue measuring voltage

Converter for sensors: Connection option for a sensor (passive or active sensor or switching contact). The MP actuator serves as an analogue/digital converter for the transmission of the sensor signal via MP-Bus to the higher level system.

Parameterisable actuators: The factory settings cover the most common applications. Input and output signals and other parameters can be altered with the PC-Tool MFT-P or with the Service tool ZTH EU.

Simple direct mounting: Simple direct mounting on the ball valve with only one screw. The mounting orientation in relation to the ball valve can be selected in 90° steps.

High functional reliability: The actuator is overload protected, requires no limit switches and automatically stops when the end stop is reached.

Home position: The first time the supply voltage is switched on, i.e. at the time of commissioning, the actuator carries out an adaption, which is when the operating range and position feedback adjust themselves to the mechanical setting range. The actuator then moves into the position defined by the positioning signal. Factory setting: R (counter-clockwise rotation).

Adaption and synchronisation: An adaption can be triggered manually by switching the direction of rotation switch from the left to the right twice within 5s or with the PC-Tool. Both mechanical end stops are detected during the adaption (entire setting range). Automatic synchronisation after actuating the direction of rotation switch once is programmed. The synchronisation is in the home position (0%). A range of settings can be adapted using the PC-Tool (see MFT-P documentation)

Electrical data:

• Nominal voltage AC/DC 24 V
• Nominal voltage frequency 50/60 Hz
• Nominal voltage range AC 19.2...28.8 V / DC 21.6...28.8 V
• Power consumption in operation 6 W
• Power consumption in rest position 2.5 W
• Power consumption for wire sizing 10 VA
• Connection supply / control Cable 1 m, 4 x 0.75 mm²
• Parallel operation Yes (note the performance data)

Functional data:

• Torque motor Min. 4 Nm
• Torque spring return Min. 4 Nm
• Positioning signal Y DC 0...10 V
• Positioning signal Y note Input impedance 100 kΩ
• Control signal Y variable Open-close, 3-point (AC only) and modulating (DC 0...32 V)
• Operating range Y DC 2...10 V
• Operating range Y variable Start point DC 0.5...30 V and end point DC 2.5...32 V
• Position feedback U DC 2...10 V
• Position feedback U note Max. 0.5 mA
• Position feedback U variable Start point DC 0.5...8 V and end point DC 2.5...10 V
• Position accuracy ±5%
• Direction of rotation motor Y=0 (0V = A - AB = 0%)
• Direction of rotation spring-return Deenergised NC, valve closed (A - AB = 0%)
• Manual override No
• Angle of rotation 95°
• Running time motor 75 s / 90°
• Motor running time variable 75...300 s
• Running time emergency control position < 20 s / 90°
• Adaption setting range manual (automatic on first power-up)
• Adaption setting range variable No action, adaption when switched on Adaption after using the rotation switch
• Override control MAX (maximum position) = 100%, MIN (minimum position) = 0% and ZS (intermediate position, AC only) = 50%
• Override control variable MAX = (MIN + 33%)...100%, MIN = 0%...(MAX – 33%) and ZS = MIN...MAX
• Sound power level motor 45 dB(A)
• Position indication Mechanical
• Service life Min. 60,000 emergency positions

Safety:

• Protection class IEC/EN III Safety extra-low voltage
• Degree of protection IEC/EN IP54
• EMC CE according to 2004/108/EC
• Certification IEC/EN IEC/EN 60730-1 and IEC/EN 60730-2-14
• Mode of operation Type 1
• Rated impulse voltage supply / control 0.8 kV
• Control pollution degree 3
• Ambient temperature -30...50°C
• Non-operating temperature -40...80°C
• Ambient humidity 95% r.h., non-condensing
• Maintenance Maintenance-free

Weight: Approx. 1.5 kg