1
Technical Data
LMQB24-1
LMQX24-1
Power Supply
24 VAC ±20% 50/60 Hz
24 VDC ±10%
Power Consumption
12 W (1.5 W)
Transformer Sizing
18 VA (Class 2 power source) (Imax 20A@5ms)
Electrical Connection
3 ft plenum rated
cable
3, 10 or 16 ft
plenum rated cable
Overload Protection
electronic throughout 0 to 95° rotation
Control
On/Off
Input Impedance
600
Ω
Angle of Rotation
max. 95°, adjust. with mechanical stop
Torque
35 in-lb [4 Nm]
Direction of Rotation
reversible with switch
Position Indication
reflective visual indicator (snap-on)
Manual Override
external push button
Running Time
2.5 seconds
2.5, 5 or 10 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
UL 60730-1 A/-2-14, CAN/CSA
E60730-1:02, CSA C22.2 No. 24-93, CE
according to 2004/108/EC and 89/336/EEC
Noise Level
<52 dB(A)
Servicing
maintenance free
Quality Standard
ISO 9001
Weight
1.8 lbs [0.85 kg]
Rated Impulse Voltage 800V, Type of action 1, (1.B for -S version), Control Pollution
Degree 3.
Application
For On/Off 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 ½” up to 1.05” in
diameter by means of its standard universal 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 LMQB(X) 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 LMQB(X)24-1 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.)
LMQB24-1, LMQX24-1
Quick On/Off Control, Non-Spring Return,
Direct Coupled, 24V
Torque min. 35 in-lb for control of damper surfaces up to 11 sq ft.
4 1
LMQX24 1
1.97”
[50]
4.88” [124]
4.76” [121]
1.61” [41]
0.98” [25]
3.15”
[80]
2.95”
[75]
