Product Overview
Technical data sheet LF24-3 US
www.belimo.us LF24-3 US • en-us • 2021-02-04 • Subject to change 1 / 2
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Floating Point, Spring Return, 24 V
Technical data
Electrical data Nominal voltage AC/DC24V
Nominal voltage frequency 50/60Hz
Power consumption in operation 2.5 W
Power consumption in rest position 1 W
Transformer sizing 5 VA (class 2 power source)
Electrical Connection 18 GA appliance cable, 3 ft [1 m], with 1/2" conduit
connector
Overload Protection electronic throughout 0...95° rotation
Functional data
Input Impedance 1000 Ω (0.6 W)
Position feedback U note No Feedback
Direction of motion motor selectable with switch 0/1
Direction of motion fail-safe reversible with cw/ccw mounting
Angle of rotation 90°
Running Time (Motor) 150s constant, independent of load
Running time motor note constant, independent of load
Running time fail-safe <25s @ -4...122°F [-20...50°C], <60 s @ -22°F [-30°C]
Noise level, motor 50dB(A)
Noise level, fail-safe 62dB(A)
Position indication Mechanical
Safety data
Degree of protection IEC/EN IP54
Degree of protection NEMA/UL NEMA2 ULEnclosureType2
Agency Listing cULus acc. To UL 873 and CAN/CSA C22.2 No. 24-93
Quality Standard ISO 9001
Ambient temperature -22...122°F [-30...50°C]
Storage temperature -40...176°F [-40...80°C]
Ambient humidity max. 95% r.H., non-condensing
Servicing maintenance-free
Weight
Weight 3.1 lbs (1.40 kg.)
Safety notes
PVC W'Shld for GV w/UGLK (GM)
Battery Back Up System for SY(7~10)-110
120 to 24 VAC, 40 VA transformer.
Cable for ZTH US to actuators w/o diagnostics socket.
50% voltage divider kit (resistors with wires).
PC Tool computer programming interface, serial port.
Electrical installation
INSTALLATION NOTES
Actuators with appliance cables are numbered.