J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
Technical Data LMX24-3… on/off-floating
Power Supply 24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power Consumption 1.5 W (0.2 W)
Transformer Sizing 2 VA (Class 2 power source)
Electrical Connection 18 GA plenum rated cable
1/2” conduit connector
❑ 3 ft [1m] ❑ 10 ft [3m] ❑ 16 ft [5m]
Overload Protection electronic throughout 0 to 95° rotation
Control on/off, floating point
Input Impedance 600Ω
Angle of Rotation max. 95°, adjust. with mechanical stop
Torque 45 in-lb [5 Nm]
Direction of Rotation reversible with switch
Position Indication reflective visual indicator (snap-on)
Manual Override external push button
Running Time ❑ 150 seconds ❑ 45 seconds
❑ 95 seconds ❑ 35 seconds
❑ 60 seconds
constant independent of load
Humidity 5 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]
Housing NEMA 2/IP54
Housing Material UL94-5VA
Agency Listings† cULus acc. to UL60730-1A/-2-14,
CAN/CSA E60730-1, CSA C22.2
No. 24-93, CE acc. to 89/336/EEC
Noise Level <35dB(A)
Servicing maintenance free
Quality Standard ISO 9001
Weight 1.1lbs [0.5 Kg],
LMX24-3-T
Electrical connection screw terminal (for 26 to 14 GA wire)
❑ unprotected (NEMA 1)
❑ protected (NEMA 2)
†Rated Impulse Voltage 800V, Type of action 1,
Control Pollution Degree 3.
LMX24-3 (-T)
On/Off-Floating Point Control, Non-Spring Return, Direct Coupled, 24 V
Torque min. 45 in-lb for control of damper
surfaces up to 11 sq ft.
LMX24-3
LMX24-3-T
Application
For on-off and floating point control of dampers in HVAC sys-
tems. 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 standard universal
clamp. Shafts up to 3/4” diameter can be accommodated by
an accessory clamp.
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 LMX series provides 95° of rotation and a visual indicator
which indicates position of the actuator. When reaching the
damper or actuator end position, the actuator automatically
stops. The gears can be disengaged with manual release on
the actuator cover.
The LMX24-3… 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.
Dimensions
(All numbers in brackets are in millimeters.)
D120
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