ON/OFF FLOATING NON-SPRING RETURNActuator Type | Non fail-safe |
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Control Type | Floating/3-point |
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Electrical Connection | terminals |
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Angle of Rotation | 0...287.5� |
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Direction of Rotation (Motor) | by electrical installation |
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Power Consumption (Holding) | 0.2�W |
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Power Consumption (Running) | 1 W |
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Degree of Protection | NEMA�2, UL�Enclosure�Type�2 |
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Shaft Diameter | 1/4" to 1/2" round, centers on 3/8" |
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Manual Override | disengage with magnet |
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Application | Damper actuator for operating air control dampers in ventilation and air-conditioning systems for building services installations. ? For air control dampers up to approximately 4.5 sq ft ? Torque 2 Nm ? Nominal voltage AC/DC 24 V ? Control: Open-close or 3-point ? Running time 35 sec. @ 90� |
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Servicing | maintenance free |
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Power Supply | 24 VAC � 20% 50/60 Hz 24 VDC � 20% |
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Transformer Sizing | 1.5 VA (Class 2 power source) |
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Electrical Connection | 3 ft, 18 GA appliance rated cable protected NEMA 2 (IP54) |
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Overload Protection | electronic throughout rotation |
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Angle of Rotation | without end stop; limitless with end stop; 315� fi x 287.5� max. with two end stops |
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Manual Override | disengage with magnet |
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Housing | NEMA 2, IP54, UL enclosure type 2 |
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Agency Listings | cULus acc. to UL 60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EEC and 2006/95/EC |
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Position Indication | reflective visual indicator (snap-on), with magnet |
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Control | on/off, fl oating point |
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Ambient temperature | -22�F to 122�F [-30�C to 50�C] |
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Humidity | 5 to 95% RH non condensing (EN 60730-1) |
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Running Time | 35 seconds, constant independent of load |
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Direction of Rotation | by electrical installation |
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Storage temperature | -40�F to 176�F [-40�C to 80�C] |
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Power consumption | 1.0 W (0.2 W resting) |
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Form fit | 0.31" x 0.31" [8mm x 8mm] |
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Operation | Simple direct mounting on the damper spindle with a universal spindle clamp or form fit, supplied with an anti-rotation bracket to prevent the actuator from rotating. Manual operation is possible with a magnet (the gearing latch remains disengaged as long as the magnet is in place). Adjustable angle of rotation with mechanical end stops, that requires no tools to move or remove. The actuator is overload-proof, requires no limit switches and automatically stops when the end stops is reached. The CM24-3 actuator uses a brushless DC motor, which is controlled by an Application Specific Integrated Circuit (ASIC). The ASIC monitors and controls the actuator?s rotation sensing (DRS) function to prevent damage to the actuator in a stall condition. Power consumption is reduced in holding mode. Belimo?s Halomo sensorless brushless DC motor spins by reversing the poles of stationary electromagnets housed inside rotational permanent magnets. The electromagnetic poles are switched by the an ASIC developed by Belimo. Unlike the conventional DC motor, there are no brushes to wear or commutators to foul. This means the brushless DC motor adds accuracy and reduces power consumption in a holding mode. |
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Typical Specification | Floating point, on/off control damper actuators shall be electronic direct-coupled type, which require no crank arm and linkage and be capable of direct mounting to a shaft from 1/4? to 1/2?. Actuators shall have brushless DC motor technology and be protected from overload at all angles of rotation. Actuators shall have manual override on the cover. If required, actuators will be provided with screw terminal strip for electrical connections (CMB24-3-T). Run time shall be constant and independent of torque. Actuators shall be cULus listed, have a 5-year warranty, and be manufactured under ISO 9001 International Quality Control Standards. Actuators shall be as manufactured by Belimo. |
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