LM24-SR ACTUATOR 2-10VDC| Application | For proportional modulation 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 diameter by means of its universal clamp. Shafts up to 3/4? diameter can be accommodated by an accessory clamp. The actuator operates in response to a 2 to 10 VDC, or with the addition of a 500 � resistor, a 4 to 20 mA control input from an electronic controller or positioner. A 2 to 10 VDC feedback signal is provided for position indication or master-slave applications. |
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| S1A, S2A | Auxiliary Switch(es) |
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| P...A | Feedback Potentiometers |
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| NSV24 US | Battery Back-Up Module |
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| ZS-100 | Weather Shield - Steel |
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| ZS-150 | Weather Shield - Polycarbonate |
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| TOOL-06 | 8 mm & 10 mm Wrench |
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| ZS-T | Terminal Cover for NEMA 2 |
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| P370 | Shaft Mount Auxiliary Switch |
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| SGA24 | Min positioners in NEMA 4 housing |
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| SGF24 | Min positioners for flush panel mounting |
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| ADS-100 | Analog to Digital Switch |
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| ZG-R01 | Resistor for 4 to 20 mA Conversion |
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| PTA-250 | Pulse Width Modulation Interface |
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| IRM-100 | Input Rescaling Module |
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| ZG-LMSA-1 | Shaft Adaptor for 3/8? Diameter Shafts |
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| K-LM20 | 3/4? [20 mm] Shaft Clamp |
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| ZG-LMSA | Shaft Adaptor for 1/2? Diameter Shafts |
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| Operation | The actuator is not provided with and does not require any limit switches, but is electronically protected against overload. The anti-rotation strap supplied with the actuator will prevent lateral movement. The LMB series provides 95� of rotation and a visual indicator indicates position of the actuator. When reaching the damper or actuator end position, the actuator automatically stops. The gears can be manually disengaged with a button on the actuator cover. The LMB24-SR? actuators use a sensorless brushless DC motor, which is controlled by an Application Specific Integrated Circuit (ASIC). The ASIC monitors and controls the 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 holding mode. Add-on auxiliary switches or feedback potentiometers are easily fastened directly onto the actuator body for signaling and switching functions. |
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| Typical Specification | Proportional 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
accessory clamp. Actuators must provide proportional damper control in response
to a 2 to 10 VDC or, with the addition of a 500 � resistor, a 4 to 20 mA control input
from an electronic controller or positioner. Actuators shall have brushless DC motor
technology and be protected from overload at all angles of rotation. Actuators shall
have reversing switch and manual override on the cover. If required, actuator will be
provided with screw terminal strip for electrical connections (LMB24-SR-T). Run time
shall be constant and independent of torque. A 2 to 10 VDC feedback signal shall be
provided for position indication. 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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