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.54"
2" [50.8]
LHX24-SR-100 Technical Data Sheet
Modulating, Non-Spring return, Linear, 24 V, for DC 2...10 V and 4...20 mA
Linear force min. 34 lbf for control of damper surfaces up to 11 sq.
ft.
Application
For proportional modulation of dampers in HVAC systems. Actuator sizing
should be done in accordance with the damper manufacturer’s specifications.
The actuator operates in response to a 2 to 10 VDC, or with the addition of
a 500 Ω resistor, a 4 to 20 mA control input from an electronic controller or
positioner.
A 2 to 10 VDC feedback signal is provided for position indication or masterslave applications.
Technical Data
1584
Power Supply 24 VAC, ±20%, 50/60 Hz, 24 VDC, ±20%
Power consumption in operation 1.5 W
Power consumption in rest
0.5 W
position
Transformer sizing 3 VA (class 2 power source)
Electrical Connection 18 GA plenum cable with 1/2” conduit
connector, degree of protection NEMA 2 /
IP54, 3 ft [1 m] 10 ft [3 m] and 16ft [5 m]
Overload Protection electronic throughout full stroke
Operating Range 2...10 V, 4...20 mA w/ ZG-R01 (500 Ω, 1/4
W resistor)
Input Impedance 100 kΩ for 2...10 V (0.1 mA), 500 Ω for
4...20 mA
Position Feedback 2...10 V, Max. 0.5 mA
Stroke 4” [100 mm]
Actuating force motor 35 lbf [150 N]
Direction of motion motor reversible with switch
Manual override external push button
Running Time (Motor) 150 s 100 mm
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 IP54, NEMA 2, UL Enclosure Type 2
Housing material UL94-5VA
Agency Listing cULus acc. to UL60730-1A/-2-14, CAN/CSA
E60730-1:02, CE acc. to 2014/30/EU and
2014/35/EU
Noise level, motor 35 dB(A)
Servicing maintenance-free
Quality Standard ISO 9001
Weight 0.88 lb [0.40 kg]
†Rated Impulse Voltage 800V, Type of Action 1, Control Pollution Degree 2.
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 actuator provides 4” [100 mm]
of linear stroke. The stroke of the gear rack can be adjusted on both sides in
increments of 0.8 in [20 mm] by means of the mechanical end stops. When
reaching the damper or actuator end position, the actuator automatically stops.
The gears can be manually disengaged with a button on the actuator cover.
The 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.
Dimensions (Inches[mm])
3" [75]
2.6"
1.1"
[66]
[27.8]
.16" [4]
0.13" [3.2]
[67]
2.64"
[13.7]
Stroke
4" [100]
8" [200]
12" [300]
B
A
.69"
[17.4]
B
A
9.2" [233.5]
13.1" [333.5]
17.1" [433.5]
A
B
10.4" [264.2]
14.3" [364.2]
18.3" [464.2]
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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Feedback Signal
Modulating, Non-Spring return, Linear, 24 V, for DC 2...10 V and 4...20 mA
Accessories
KG10A Ball joint
KG8 Ball joint
SH8 Push rod for KG6 & KG8 ball joints (36” L, 5/16” diameter).
Z-DS1 Rotary support
Z-KSC 3/8”-16 shaft clevis for AHK/AH.
ZG-119 Bracket for AHK/AH/LH linear actuators.
IRM-100 Input rescaling module for modulating actuators.
PS-100 Low voltage and control signal simulator.
PTA-250 Pulse width modulation interface for modulating actuators.
SGA24 Positioners suitable for use with the modulating damper
actuators LM..A-SR, NM..A-SR, SM..A-SR and GM..A-SR
SGF24 Positioners suitable for use with the modulating damper
actuators LM..A-SR, NM..A-SR, SM..A-SR and GM..A-SR
TF-CC US Cable conduit connector, 1/2”.
ZG-R01 4 to 20 mA adaptor, 500Ω, 1/4 W resistor w 6” pigtail wires.
ZG-R02 50% voltage divider kit (resistors with wires).
ZG-SGF Mounting plate for SGF.
ZG-X40 120 to 24 VAC, 40 VA transformer.
NSV24 US Battery back-up module for non-spring return actuators.
NSV-BAT 12V 1.2AH battery (two required for NSV24 US).
Typical Specification
Proportional control damper actuators shall be electronic direct-coupled type,
which require no crank arm and linkage and be capable of direct mounting
to a shaft up to 1.05” diameter. 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. 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.
LHX24-SR-100 Technical Data Sheet
24 VAC Transformer
Line
Volts
Ω
500 Ω
Control Signal
VDC/mA
2 to 10 VDC
2 to 10 VDC / 4 to 20 mA Control
(–)
(+)
(–)
(+)
Blk (1) Common
Red (2) Hot +
Wht (3) Y Input, 2 to 10V
Org (5) U Output
Wiring Diagrams
Provide overload protection and disconnect as required.
Actuators may also be powered by 24 VDC.
Only connect common to negative (-) leg of control circuits.
A 500 Ω resistor (ZG-R01) converts the 4 to 20 mA control signal to 2
to 10 VDC.
Actuators may be connected in parallel if not mechanically linked. Power
consumption and input impedance must be observed.
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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