Belimo LMQB24-MFT Technical Data

LMQB24-MFT, LMQX24-MFT
Quick Proportional Control, Non-Spring Return,
Direct Coupled, 24V, Multi-Function Technology®

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.)
4.88" [124]
0.98" [25] 4.76" [121]
Technical Data
Power Supply
Power Consumption
Transformer Sizing
Electrical Connection
Overload Protection
Operating Range Y
Input Impedance
Feedback Output U
Angle of Rotation
Torque
Direction of Rotation
Position Indication
Manual Override
Running Time
Humidity
Ambient Temperature
Storage Temperature
Housing
Housing Material
Agency Listings
Noise Level
Servicing
Quality Standard
Weight
Rated Impulse Voltage 800V, Type of action 1, Control Pollution Degree 3.
1.61" [41]
Torque min. 35 in-lb for control of damper surfaces up to 11 sq ft.
1
LMQB24-MFT T LMQX24-MFT LMQX24-MFT
24 VAC ±20% 50/60 Hz
24 VDC ±10%
12 W (1.5 W)
18 VA (Class 2 power source) (Imax 20A@5ms)
3 ft plenum rated 3, 10 or 16 ft plenum
cable rated cable
electronic throughout 0 to 95° rotation
2 to 10 VDC, 4 to 20 mA (default)
Variable (VDC, On/Off)
100 kΩ (0.1 mA), 500 Ω,
1500 Ω (On/Off)
2 to 10 VDC, 0.5mA max, VDC Variable
max. 95°, adjust. with mechanical stop
electronically variable
35 in-lb [4 Nm]
reversible with switch
reflective visual indicator (snap-on)
external push button
2.5 seconds 2.5, 5 or 10 seconds
5 to 95% RH non-condensing (EN 60730-1)
-22°F to +122°F [-30°C to +50°C]
-40°F to +176°F [-40°C to +80°C]
NEMA 2/IP54
UL94-5VA
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
<52 dB(A)
maintenance free
ISO 9001
1.8 lbs [0.85 kg]