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1.85” [47]
2.6” [66]
0.86” [22]
LMB24-3-P5-T Technical Data Sheet
On/Off, Floating Point, Non-Spring Return, 24 V
Technical Data
Power Supply 24 VAC, ±20%, 50/60 Hz, 24 VDC, ±10%
Power consumption in operation 1.5 W
Power consumption in rest
position
Transformer sizing 2.5 VA (class 2 power source)
Shaft Diameter 1/4...5/8” round, centers on 5/8”, 3/4” clamp
Electrical Connection Screw terminal (for 26 to 14 GA wire)
Overload Protection electronic throughout 0...95° rotation
Feedback potentiometer 5 kΩ
Input Impedance 600 Ω
Position Feedback 5 kΩ
Angle of rotation Max. 95°, adjustable with mechanical stop
Torque motor 45 in-lb [5 Nm]
Direction of motion motor selectable with switch 0/1
Position indication Mechanically, 30...65 mm stroke
Manual override external push button
Running Time (Motor) default 95 s, variable 35, 45, 60, 150 s,
Ambient humidity max. 95% r.H., non-condensing
Ambient temperature -22...122°F [-30...50°C]
Storage temperature -40...176°F [-40...80°C]
Degree of Protection IP20, NEMA 1, UL Enclosure Type 1
Housing material UL94-5VA
Agency Listing cULus acc. to UL60730-1A/-2-14, CAN/CSA
Noise level, motor 35 dB(A)
Servicing maintenance-free
Quality Standard ISO 9001
Weight 100 lb [0.46 kg]
†Rated Impulse Voltage 800V, Type of Action 1.AA.B, Control Pollution Degree 3.
0.2 W
available
constant, independent of load
E60730-1:02, CE acc. to 2014/30/EU and
2014/35/EU
1525
Torque min. 45 in-lb, for control of damper surfaces up to 11 sq. ft.
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 LMB 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 LMB24-3… 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.
The LMB24-3-S version is provided with one built-in auxiliary switch. This SPDT
switch is provided for safety interfacing or signaling, for example, for fan startup. The switching function is adjustable 0 to 95°. The auxiliary switch is double
insulated so an electrical ground connection is not necessary.
Add-on auxiliary switches or feedback potentiometers are easily fastened
directly onto the actuator body for signaling and switching functions.
Dimensions (Inches[mm])
2.34” [59.4]
3.47” [88]
4.57” [116]
To center of
mounting slot.
Date created, 02/10/2020 - Subject to change. © Belimo Aircontrols (USA), Inc.
3.7” [94]
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
2” [50.8]
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Accessories
Line
V
Line
V
24 VAC Transformer
Line
V
24 VAC Transformer
Line
V
24 VAC Transformer
KH8 Damper crank arm
KH10 Damper crank arm
KG8 Ball joint
KG10A Ball joint
SH8 Push rod for KG6 & KG8 ball joints (36” L, 5/16” diameter).
SH10 Push rod for KG10A ball joint (36” L, 3/8” diameter).
ZG-DC1 Damper clip for damper blade, 3.5” width.
ZG-DC2 Damper clip for damper blade, 6” width.
ZS-100 Weather shield - galvaneal 13x8x6” (LxWxD).
ZS-101 Base plate for ZS-100.
ZS-150 Weather shield - PC w/ foam seal 16x8-3/8x4” (LxWxD).
AV8-25 Shaft extension
TF-P Anti-rotation bracket TF/NKQ/AM/NM/LM.
ZG-100 Univ. right angle bracket 17”x11-1/8”x6” (HxWxbase).
ZG-101 Univ. right angle bracket 13x11x7-7/16” (HxWxbase).
TOOL-06 8 mm and 10 mm wrench.
Z-SPA Adapter
PS-100 Low voltage and control signal simulator.
K-LM10 LMB(X) clamp (3/8”).
K-LM12 LMB(X) clamp (1/2”).
K-LM16 Standard LMB(X) clamp (5/8”).
K-LM20 LMB(X) clamp (3/4”).
ZG-LMSA Shaft extension for 1/2” diameter shafts (3” L).
ZG-LMSA-1 Shaft extension for 3/8” diameter shafts (4” L).
ZG-LMSA-1/2-5 Shaft extension for 1/2” diameter shafts (5” L).
AV6-20 Shaft extension
S1A Auxiliary switch for damper actuators and rotary actuators
S2A Auxiliary switch for damper actuators and rotary actuators
P475 Shaft mount, non-Mercury aux. switch for 1/2” dia. shafts.
P475-1 Shaft mount, non-Mercury aux. switch for 1” dia. shafts.
P140A GR Feedback potentiometer for damper actuators and rotary
P500A GR Feedback potentiometer for damper actuators and rotary
P1000A GR Feedback potentiometer for damper actuators and rotary
P2800A GR Feedback potentiometer for damper actuators and rotary
P5000A GR Feedback potentiometer for damper actuators and rotary
P10000A GR Feedback potentiometer for damper actuators and rotary
NSV24 US Battery back-up module for non-spring return actuators.
NSV-BAT 12V 1.2AH battery (two required for NSV24 US).
ZG-X40 120 to 24 VAC, 40 VA transformer.
Typical Specification
Floating point, on/off control damper actuators shall be electronic directcoupled 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 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 [LMB(X)24-3-T]. If required, actuators shall be provided with one
adjustable SPDT auxiliary switch. Actuators with auxiliary switches must be
constructed to meet the requirements for double insulation so an electrical
ground is not required to meet agency listings. 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.
actuators
actuators
actuators
actuators
actuators
actuators
LMB24-3-P5-T Technical Data Sheet
On/Off, Floating Point, Non-Spring Return, 24 V
24 VAC Transformer
olts
On/Off
olts
Floating Point
olts
ComHot
Floating Point - Triac Source
olts
ComHot
Floating Point - Triac Sink
S1
S2
S3
5kΩ Potentiometer
A
(1) Common
(2) + Hot
(3) + Input
(1) Common
(2) + Hot
(3) + Input
6
5K Ω
1 3
A
1 3
A
1 3 11
Blk (1) Common
Red (2) + Hot
Wht (3) Y Input
A
1
Blk (1) Common
Red (2) + Hot
Wht (3) Y Input
11 16
11 16
11
Date created, 02/10/2020 - Subject to change. © Belimo Aircontrols (USA), Inc.
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
Page 3
LMB24-3-P5-T Technical Data Sheet
On/Off, Floating Point, Non-Spring Return, 24 V
Wiring Diagrams
Actuators with appliance cables are numbered.
A
Provide overload protection and disconnect as required.
Actuators may also be powered by 24 VDC.
Actuators Hot wire must be connected to the control board common.
Only connect common to neg. (-) leg of control circuits. Terminal
models (-T) have no-feedback.
Actuators may be connected in parallel if not mechanically linked. Power
consumption and input impedance must be observed.
Actuators are provided with a numbered screw terminal strip instead of
16
a cable.
Potentiometer Wiring
Date created, 02/10/2020 - Subject to change. © Belimo Aircontrols (USA), Inc.
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
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