LR24A-MOD Rotary Actuator, 5 Nm, AC/DC 24 V, 90 s - Belimo | ideal for ball valves

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The Belimo LR24A-MOD is a kind of Actuator used in HVAC applications and air ventilation systems.

To control the damper, this kind of Actuator turns it by Rotary motion.

The Torque used by the LR24A-MOD is 5 Nm.

This Belimo Actuator requests a power supply of 24Vac/Vdc.

If you have questions concerning size or installation, refer to the Belimo custom datasheet above or email iacs for individualised support.

LR24A-MOD Rotary Actuator, 5 Nm, AC/DC 24 V, 90 s

• 5 Nm AC/DC 24 V, Modbus RTU
• Running time motor 90 s adjustable
• IP 54, Manual override with push-button
• Connection PVC cable 1m
• Direction of rotation reversible (right/left)

Mode of operation: The actuator is fitted with an integrated interface for Modbus RTU, it receives the digital positioning signal from the Modbus-Master and returns the current status.

Converter for sensors: Connection option for a sensor (passive or active sensor or switching contact). In this way, the analogue sensor signal can be easily digitised and transferred to Modbus.

Parameterisable actuators: The factory settings cover the most common applications. Single parameters can be modified with the Belimo Service Tools MFT-P or ZTH EU. The Modbus communication parameters (address, baud rate etc.) are set with the ZTH EU. Pressing push-button “Service” on the actuator while connecting the supply voltage resets the communication parameters to the factory setting. Quick addressing: The Modbus address can alternatively be set using push-buttons on the actuator from 1 to 16. The value selected is added to the «Basic address» parameter and results in the effective Modbus address. For example, with a basic address of 140, Modbus addresses between 141 and 156 can be parameterised using quick addressing.

Simple direct mounting: Straightforward direct mounting on the ball valve with only one central screw. The assembly tool is integrated in 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 is disengaged for as long as the button is pressed or remains locked).

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

Adjustable angle: of rotation Adjustable angle of rotation with mechanical end stops. 

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: Y2 (counter-clockwise rotation).

Adaption and synchronisation An adaption can be triggered manually by pressing the “Adaption” button or with the PC-Tool. Both mechanical end stops are detected during the adaption (entire setting range). Automatic synchronisation after pressing the gearbox disengagement button is configured. The synchronisation is in the home position (0%). The actuator then moves into the position defined by the positioning signal. 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 2.5 W
• Power consumption in rest position 1.3 W
• Power consumption for wire sizing 5 VA
• Connection supply / control Cable 1 m, 6 x 0.75 mm²

Data bus communication:

• Protocol Modbus RTU (RS-485), not galvanically isolated
• Number of nodes Max. 32 (without repeater)
• Transmission formats 1-8-N-2, 1-8-N-1, 1-8-E-1, 1-8-O-1 Default: 1-8-N-2 (start bits, data bits, parity, stop bits)
• Baud rate 9600, 19,200, 38,400, 76,800, 115,200 Bd Default: 38,400 Bd
• Terminating resistor 120 Ohm, can be switched
• Parameterisation with Service Tool ZTH EU Pushbutton-operated fast addressing 1 ... 16 possible

Functional data:

• Torque motor Min. 5 Nm
• Position accuracy ±5%
• Manual override Gear disengagement with push-button, can be locked
• Running time motor 90 s / 90°
• Motor running time variable 35...420 s
• Adaption setting range manual (automatic on first power-up)
• Adaption setting range variable No action Adaption when switched on Adaption after pushing the gear disengagement button
• Override control, controllable via Modbus MAX (maximum position) = 100%, MIN (minimum position) = 0% and ZS (intermediate position) = 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 Mechanically, pluggable

Safety:

• Protection class IEC/EN III Safety extra-low voltage
• Degree of protection IEC/EN IP54
• Degree of protection NEMA/UL NEMA 2, UL Enclosure Type 2
• EMC CE according to 2004/108/EC
• Certification IEC/EN IEC/EN 60730-1 and IEC/EN 60730-2-14
• Certification UL cULus according to UL 60730-1A, UL 60730-2-14 and CAN/CSA E60730-1:02
• Mode of operation Type 1
• Rated impulse voltage supply / control 0.8 kV
• Control pollution degree 3
• Ambient temperature -30...50°C