Belimo NF24A User manual

www.belimo.com T2-NF24A • en • v1.1 • 06.2011 • Subject to changes 1 / 3
Technical data sheet NF24A
Technical data
Electrical data Nominal voltage AC 24 V, 50/60 Hz / DC 24 V
Nominal voltage range AC 19.2 ... 28.8 V / DC 21.6 ... 28.8 V
Power consumption In operation
At rest
For wire sizing
6 W @ nominal torque
2.5 W
8.5 VA
Connection Cable 1 m, 2 x 0.75 mm2
Functional data Torque Motor
Spring return
Min. 10 Nm @ nominal voltage
Min. 10 Nm
Direction of rotation Can be selected by mounting L / R
Manual override With hand crank and interlocking switch
Angle of rotation Max. 95° , can be limited with adjustable
mechanical end stop
Running time Motor
Spring return
≤75 s (0 ... 10 Nm)
≤20 s @ –20 ... 50°C / max. 60 s @ –30°C
Sound power level Motor
Spring return
≤45 dB (A)
≤62 dB (A)
Service life Min. 60,000 emergency positions
Position indication Mechanical
Safety Protection class III Extra low voltage
UL Class 2 Supply
Degree of protection IP54
NEMA2, UL Enclosure Type 2
EMC CE according to 2004/108/EC
Certication Certied to IEC/EN 60730-1 and IEC/EN 60730-2-14
cULus according to UL 60730-1A and UL 60730-2-14
and CAN/CSA E60730-1:02
Mode of operation Type 1.AA
Rated impulse voltage 0.8 kV
Control pollution degree 3
Ambient temperature –30 ... +50°C
Non-operating temperature –40 ... +80°C
Ambient humidity 95% r.h., non-condensating
Maintenance Maintenance-free
Dimensions / Weight Dimensions See «Dimensions» on page 3
Weight Approx. 1.8 kg
Spring return actuator with emergency
function for adjusting air dampers in
ventilation and air conditioning systems
in buildings
• For air dampers up to approx. 2 m2
• Torque 10 Nm
• Nominal voltage AC/DC 24 V
• Control: Open-close

www.belimo.com T2-NF24A • en • v1.1 • 06.2011 • Subject to changes 2 / 3
Technical data sheet NF24A
Safety notes
!
• The actuator is not allowed to be used outside the specified field of application, especially in
aircraft or in any other airborne means of transport.
• It may only be installed by suitably trained personnel. Any legal regulations or regulations
issued by authorities must be observed during assembly.
• The device may only be opened at the manufacturer's site. It does not contain any parts that
can be replaced or repaired by the user.
• The cable must not be removed from the device.
• When calculating the required torque, the specifications supplied by the damper manufacturers
(cross-section, design, installation site), and the air flow conditions must be observed.
• The device contains electrical and electronic components and is not allowed to be disposed
of as household refuse. All locally valid regulations and requirements must be observed.
Product features
Mode of operation The actuator moves the damper to the operating position at the same time as tensioning the
return spring. The damper is turned back to the safety position by spring force if the supply
voltage is interrupted.
Simple direct mounting Simple direct mounting on the damper spindle with a universal spindle clamp, supplied with an
anti-rotation strap to prevent the actuator from rotating.
Manual override Manual operation of the damper with the hand crank, locking in any position with the interlocking
switch. Unlocking is manual or automatic by applying the operating voltage.
Adjustable angle of rotation Adjustable angle of rotation with mechanical end stop.
High operational reliability The actuator is overload-proof, requires no limit switches and automatically stops when the end
stop is reached.
Notes
• Connect via safety isolation transformer.
• Parallel connection of other actuators possible.
Note the performance data.
!
Electrical installation
Wiring diagram
12
–+
T
~
Cable colours:
1 = black
2 = red
.
.
.
.
.
.
.
.
.
.
.
Accessories
Description Data sheet
Electrical accessories Auxiliary switch unit S2A-F � � T2 - S2A-F
Feedback potentiometer unit P200A-F � � T2 - P200A-F
Mechanical accessories Various accessories
* further versions on request

www.belimo.com T2-NF24A • en • v1.1 • 06.2011 • Subject to changes 3 / 3
Technical data sheet NF24A
Dimensions [mm]
Dimensional drawings
60 20.512.5
93
2-FRONT
32 27
162
172
182
236
98
80
Variant 1a:
¾“-spindle clamp (with insertion part) EU Standard
Damper spindle Length
≥85 10 ... 22 10 14 ... 25.4
≥15
Variant 1b:
1“-spindle clamp (without insertion part) EU Standard
Damper spindle Length
≥85 19 ... 25.4
(26.7) 12 ... 18
≥15
Variant 2:
½“-spindle clamp (optional via conguration)
Damper spindle Length
≥85 10 ... 19 14 ... 20
≥15

 NF(..)A(-S2)/SF(..)A(-S2)
www.belimo.com M2-NF(..)A(-S2)/SF(..)A(-S2) • v1.3 • 06.2012 1 / 2
71127-00001.F
10 Nm
10
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.4
.6
.8
.9
.8
.7
.6
.5
.4
.3 .2 .1
33 ... 100%
min. 85
10 ... 22
19 ... 25.4
min. 15
10 ... 22
19 ... 25.4
A B

2 / 2 M2-NF(..)A(-S2)/SF(..)A(-S2) • v1.3 • 06.2012 www.belimo.com
NF(..)A(-S2)/SF(..)A(-S2)
AC24V/DC24V
12
–+
T
~
12
–+
T
~
S1 S2 S3 S4 S5 S6
<A
>A
<B
>B
A =10% B=11 ... 90%
230 V +
+
+
+
230 V
24 V 24 V
230 V 24 V
24 V 230 V
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NF24A
SF24A
NF24A-S2
SF24A-S2
AC230V
12
NL
12S1 S2 S3 S4 S5 S6
<A
>A
<B
>B
A =10% B=11 ... 90%
NL230 V +
+
+
+
230 V
24 V 24 V
230 V 24 V
24 V 230 V
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NF230A
SF230A
NF230A-S2
SF230A-S2
AC24...240V/DC24...125V
1 2
– +
N L
T
~
S1 S2 S3 S4 S5 S6
<A
>A
<B
>B
1 2
– +
N L
T
~
A =10% B=11 ... 90%
230 V +
+
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230 V
24 V 24 V
230 V 24 V
24 V 230 V
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NFA
SFA
NFA-S2
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!
!