LF24-SR-E - 24V, Spring Return, 35 in-lb, ECON Motor Actuator

The LF series actuators provide true spring return operation for reliable fail-safe application and positive close-off on air tight dampers. The spring return system provides consistent torque to the damper with, and without, power applied to the actuator. The LF series provides 95° of rotation and is provided with a graduated position indicator showing 0 to 95°. The LF uses a brushless DC motor which is controlled by an Application Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor provides the intelligence to the ASIC to provide a constant rotation rate and to know the actuator’s exact fail-safe position. The ASIC monitors and controls the brushless DC motor’s rotation and provides a digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches. Power consumption is reduced in holding mode.

Details:

• Spring return damper actuator
• Nominal voltage: 24V AC/DC
• Power Consumption (Holding): 1 W
• Power Consumption (Running): 2.5 W
• Nominal frequency: 50/60 Hz
• Torque: 35 in-lb (20 Nm)
• Angle of rotation: Max 95°, adjustable with mechanical stop
• Running time: 150 seconds constant, independent of load
• NEMA 2 enclosure
• Ambient temperature range: -22° to 122° F (-30° to 50° C)