1
Technical Data
LMQB24-MFT
LMQX24-MFT
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
Operating Range Y
2 to 10 VDC, 4 to 20 mA (default)
Variable (VDC, On/Off)
Input Impedance
100 k
Ω
(0.1 mA), 500
Ω,
1500
Ω
(On/Off)
Feedback Output U
2 to 10 VDC, 0.5mA max, VDC Variable
Angle of Rotation
max. 95°, adjust. with mechanical stop
electronically variable
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
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, Control Pollution Degree 3.
Application
For proportional modulation 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 universal clamp.
The default parameters for 2 to 10 VDC applications of the …MFT
actuator are assigned during manufacturing. If necessary, custom
versions of the actuators can be ordered. The parameters can be changed
by two means: pre-set and custom configurations from Belimo or on-site
configurations using the Belimo PC-Tool software. (version 3.3 or later)
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
indicates position of the actuator. 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 LMQB(X)24-MFT actuators use a 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-MFT, LMQX24-MFT
Quick Proportional Control, Non-Spring Return,
Direct Coupled, 24V, Multi-Function Technology®
Torque min. 35 in-lb for control of damper surfaces up to 11 sq ft.
1.97”
[50]
4.88” [124]
4.76” [121]
1.61” [41]
0.98” [25]
3.15”
[80]
2.95”
[75]
T
LMQX24-MFT
