Belimo LF24-S - Page 45

V4. 12. 2010
.
Subject to modification
45
Technical data
Dimensions [mm]
Mechanical Fail-Safe Damper Actuator SFU24-SR
Modulating Mechanical Fail-Safe Actuator with emergency function for
adjusting air dampers in ventilation and air conditioning systems in buildings
•ΓTorque: 20Nm
•ΓNominal voltage: AC/DC 24V
•ΓControl Modulating: DC 2(0)...10V
•ΓPosition feedback: DC 2...10V
Electrical data
Nominal voltage
AC 24V 50/60Hz, DC 24V
Power consumption
Nominal voltage range
AC 19.2...28.8V, DC 21.6...28.8V
Functional data
Torque - Motor
Min. 20Nm @ nominal voltage
Min. 20Nm
Direction of rotation
Selectable by mounting L/R
Reversible with switch /
Manual override With hand crank and interlocking switch
Angle of rotation Max. 95
°
, can be limited
by means of adjustable, mechanical end stops
Running time - Motor
Sound power level - Motor
150s/90
°
Max. 20s @ -20...60
°
C/max. 60s @ -30
°
C
Max. 40dB(A) @ 150s running time
Position indication Mechanical
Working conditions
Degree of protection IP54
Ambient temperature
-30...+50
°
C
Non-operation temperature
-40...+80
°
C
Maintenance
Maintenance-free
Dimensions / weight
Weight
Approximately 2200g
Dimensions (LxWxH)
236x98x58mm
Humidity test
95% RH, non-condensing
Connection
Cable 1m, 4x0.75mm
2
Protection class
III (safety extra-low voltage)
EMC CE according to 2004/108/EC
Control pollution degree
Rated Impulse Voltage
Mode of operation
3
0.8kV
Type 1.AA
5.0W @ running / 3.5W @ holding
Wire/transformer sizing
7.0VA
Feedback signal
Control signal DC 2(0)...10V, input impedance 100k
Ω
DC 2...10V, max. 0.5mA
Position accuracy
±5%
- Spring return
- Spring return
Max. 62dB(A)
- Spring return
59
20
85
2-FR
O
NT
32 
162
172
182
236
98
80
Standard :
¾”- clamp (with insert)
Length
≥85 10
10
≥15
Optional 1:
1”- clamp (without insert)
Length
≥85
≥15
½”
Damper shaft Length
≥85 10...19
≥15
10...19
Damper shaft
Damper shaft
Optional 2:
- clamp (optional via configuration)
10...22
10...22
19...25.4
(26.7)
12...18
14...20
14...20
12...18
14...25.4
14...25.4