AbsolutAire LMX24-3 User Manual
I20618 - 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 UL 60730-1/-2-14 and
CAN/CSA C22.2 No.24, CE according
to 73 / 23 / 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)
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 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 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
188
O
M
L
©
O
A
H
B
r
r
o
u
t
s
o
h
M
l
e
s
C
s
D
®
1/4” to 3/4” [6 to 26]
5/16” to 3/4” [8 to 26]
1.85” [47]
4.57” [116]
2.6” [66]
0.86”
[22]
3.7” [94]
2.34” [59.4]
2” [50.8]
I20618 - Subject to change. © Belimo Aircontrols (USA), Inc.
LM
W343
W344
On/Off
Floating Point or On/Off control
Wiring
LMX24-3 (-T)
On/Off-Floating Point Control, Non-Spring Return, Direct Coupled, 24 V
LMX24-3 - Typical Specification:
Floating point, on/off control damper actuators shall be electronic direct-coupled type, which require no crankarm 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 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 (LMX24-3-T).
Run time shall be constant and independent of torque.
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.
Accessories
K-LM20 3/4” [20 mm] Clamp
AV6-20 Shaft Extension
ZG-LMSA Shaft Adaptor for 1/2” Diameter Shafts
ZG-LMSA-1 Shaft Adaptor for 3/8” Diameter Shafts
ZS-T Terminal Cover for NEMA 2
ZS-100 Weather Shield - Steel
ZS-150 Weather Shield - Polycarbonate
Tool-06 8 mm & 10 mm Wrench
S1A, S2A Auxiliary Switch (es)
P370 Shaft Mount Auxiliary Switch
P…A Feedback Potentiometers
Note: When using LMX24-3… actuators, only use acces-
sories listed on this page.
®
189
24 V AC Transformer
1
Line
Volts
a open
a closed
3
2
a
Blk (1) Common
Red (2) +
Wht (3) +
The indication of direction
is valid for switch position 1.
10
–
LMX24-3
24 V AC Transformer
1
2
Line
Volts
The indication of direction
is valid for switch position 1.
3
Blk (1) Common
Red (2) +
Wht (3) +
10
–
LMX24-3
Notes:
Provide overload protection and disconnect as required.
1
Actuators may also be powered by 24 VDC.
2
Meets cULus requirements without the need of an
3
electrical ground connection.
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