800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA281Torque min. 45 in-lb for control of damper surfaces up to 11 sq ft.ModelsLMB(X)24-3 LMB24-3.1 (bulk) LMB24-3-P10-TLMB(X)24-3-T LMB24-3-T.1 (bulk) LMB24-3-SLMB24-3-P5-T LMB24-3-P5-T.1 (bulk)ApplicationFor On/Off and floating point control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer’s specifications.The actuator is mounted directly to a damper shaft from 1/4” up to 5/8” in diameterby means of its standard universal clamp. Shafts up to 3/4” diameter can beaccommodated by an accessory clamp.OperationThe actuator is not provided with and does not require any limit switches, but iselectronically protected against overload. The anti-rotation strap supplied with theactuator will prevent lateral movement.The LMB series provides 95° of rotation and a visual indicator which indicates positionof the actuator. When reaching the damper or actuator end position, the actuatorautomatically stops. The gears can be disengaged with manual release on theactuator cover.The LMB24-3… actuators use a sensorless brushless DC motor, which is controlledby an Application Specific Integrated Circuit (ASIC). The ASIC monitors and controlsthe actuator’s rotation and provides a digital rotation sensing (DRS) function to prevent damage to the actuator in a stall condition. Power consumption is reduced in holdingmode.The LMB24-3-S version is provided with one built-in auxiliary switch. This SPDTswitch is provided for safety interfacing or signaling, for example, for fan start-up. Theswitching function is adjustable 0 to 95°. The auxiliary switch is double insulated soan electrical ground connection is not necessary.Add-on auxiliary switches or feedback potentiometers are easily fastened directly ontothe actuator body for signaling and switching functions.Dimensions (Inches [mm])1.85” [47]2.34” [59.4]2.6” [66]4.57” [116]3.47” [88]3.7” [94]0.86” [22]2” [50.8]1/4” to 3/4” [6 to 20] 5/16” to 3/4” [8 to 26]To center ofmounting slot.LMB24-3 ShownLMB(X)24-3(-S)(-P5)(-P10)(-T)On/Off, Floating Point, Non-Spring Return, 24 VTechnical DataLMB(X)24-3(-S)(-P5)(-P10)(-T)Power supply24 VAC ± 20% 50/60 Hz24 VDC ± 10%Power consumption1.5 W (0.2 W)Transformer sizing2.5 VA (Class 2 power source)Electrical connection18 GA plenum rated cable½” conduit connector, protected NEMA 2 (IP54)3 ft [1m] 10 ft [3m] 16 ft [5m]Overload protectionelectronic throughout 0 to 95° rotationControlon/off, floating pointInput impedance600 ΩAngle of rotationmax. 95°, adjustable with mechanical stopTorque45 in-lb [5 Nm]Direction of rotationreversible withswitchPosition indicationreflective visual indicator (snap-on)Manual overrideexternal push buttonRunning time150, 95, 60, 45, or 35 secondsconstant independent of loadHumidity5 to 95% RH non condensing (EN 60730-1)Ambient temperature-22°F to 122°F [-30°C to 50°C]Storage temperature-40°F to 176°F [-40°C to 80°C]HousingNEMA 2, IP54, UL enclosure type 2Housing materialUL94-5VAAgency listings†cULus acc. to UL 60730-1A/-2-14, CAN/CSA E60730-1:02,CE acc. to 2004/108/EEC and 2006/95/ECNoise level<35dB(A)Servicingmaintenance freeQuality standardISO 9001Weight1.1 lbs [0.5 kg]LMB24-3-SElectrical connection3 ft, 18 GA appliance rated cable1/2” conduit connectorAuxiliary switchadj. 0° to 100°, SPDT 3 A (0.5A) @ 250 VACWeight1.4 lbs [0.6 kg]LMB24-3-P10-TElectrical connectionscrew terminal (for 26 to 14 GA wire)Feedback10 k, 1W potentiometerLMB24-3-P5-T (bulk pack only)Feedback5 kΩ, 1W potentiometerHousing NEMA 1/IP20LMB24-3-T Electrical connectionscrew terminal (for 26 to 14 GA wire)Housing NEMA 1/IP20†Rated Impulse Voltage 800V, Type of action 1, (1.B for -S version), Control Pollution Degree 3.40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA28LMB(X)24-3(-S)(-P5)(-P10)(-T)On/Off, Floating Point, Non-Spring Return, 24 VAccessories K-LM203/4” [20 mm] Shaft Clamp AV6-20Shaft ExtensionZG-LMSAShaft Adaptor for 1/2” Diameter ShaftsZG-LMSA-1Shaft Adaptor for 3/8” Diameter ShaftsZS-T Terminal Cover for NEMA 2ZS-100Weather Shield - SteelZS-150Weather Shield - PolycarbonateTool-068 mm & 10 mm WrenchS1A, S2AAuxiliary Switch(es)P370Shaft Mount Auxiliary SwitchP…AFeedback PotentiometersNOTE: When using LMB(X)24-3… actuators, only use accessories listed on this page.Typical SpecificationFloating 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 5/8”. Shafts up to 3/4” diameter can be accommodate with an accessoryclamp. Actuators shall have brushless DC motor technology and be protected fromoverload at all angles of rotation. Actuators shall have reversing switch and manualoverride on the cover. If required, actuator will be provided with screw terminal strip for electrical connections [LMB(X)24-3-T]. If required, actuators shall be provided with one adjustable SPDT auxiliary switch. Actuators with auxiliary switches must be con-structed to meet the requirements for double insulation so an electrical ground is notrequired to meet agency listings. Run time shall be constant and independent of torque.AActuators shall be cULus listed, have a 5-year warranty, and be manufactured underISO 9001 International Quality Control Standards. Actuators shall be as manufacturedby Belimo.Wiring DiagramsProvide overload protection and disconnect as required.Actuators may also be powered by 24 VDC.For end position indication, interlock control, fan startup, etc., xMB24-3-Sincorporates one built-in auxiliary switches: 1 x SPDT, 3A (0.5A) @250 VAC, UL Approved, adjustable 0 to 95.Meets cULus or UL and CSA Standard requirements without theneed of an electrical ground connection.WARNING Live Electrical Components! During installation, testing, servicing and troubleshooting of this product, it may benecessary to work with live electrical components. Have a qualified licensed electrician or otherindividual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical compo-nents could result in death or serious injury.W266_08On/Off control267_08Floating Point or On/Off control268_08Auxiliary Switch M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.Next >