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Technical Data
LMB(X)24-MFT
Power supply
24 VAC ± 20% 50/60 Hz
24 VDC ± 10%
Power consumption
2.5 W (1.2 W)
Transformer sizing
5 VA (Class 2 power source)
Electrical connection
18 GA plenum rated cable
1/2” conduit connector
Protected NEMA 2 (IP54)
3 ft [1m] 10 ft [3m] 16 ft [5m]
Overload protection
electronic throughout 0 to 95° rotation
Operating range Y
2 to 10 VDC, 4 to 20 mA (default)
variable (VDC, PWM, fl oating point, on/off)
Input impedance
100 k
Ω
(0.1 mA), 500
Ω
1500
Ω
(PWM, fl oating point, on/off)
Feedback output U
2 to 10 VDC, 0.5mA max
VDC variable
Angle of rotation
max. 95°, adjustable with mechanical stop
electronically variable
Torque
45 in-lb [5 Nm]
Direction of rotation
reversible with
switch
Position indication
reflective visual indicator (snap-on)
Manual override
external push button
Running time
150 seconds (default)
variable (35 to 150 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, UL enclosure type 2
Housing material
UL94-5VA
Agency listings
cULus acc. to UL 60730-1A/-2-14,
CAN/CSA E60730-1:02,
CE acc. to 2004/108/EEC and 2006/95/EC
Noise level
<35dB(A)
Servicing
maintenance free
Quality standard
ISO 9001
Weight
1.5 lbs [0.7 kg]
LMB(X)24-MFT
Proportional, Non-Spring Return, 24 V, Multi-Function Technology
®
Torque min. 45 in-lb 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 is mounted directly to a damper shaft from 1/4” up to 5/8” in diameter
by means of its universal clamp. Shafts up to 3/4” diameter can be accommodated by
an accessory 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.
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(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 LMB(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
(Inches [mm])
4.57" [116]
3.47" [88]
2" [50.8]
0.86" [22]
2
.3
4" [5
9
.4
]
2
.6
" [
66]
1/4” to 3/4” [6 to 20]
5/16” to 3/4” [8 to 26]
D141
M
40024 - 05/10 - Subject to change.
© Belimo
Aircontrols (USA),
Inc.
