Belimo NF24A Bedienungsanleitung

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

–+

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

2-FRONT

32 27

162

172

182

236

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

.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

–+

S1 S2 S3 S4 S5 S6

A =10% B=11 ... 90%

230 V +

230 V

24 V 24 V

230 V 24 V

24 V 230 V

�

NF24A

SF24A

NF24A-S2

SF24A-S2

AC230V

12S1 S2 S3 S4 S5 S6

A =10% B=11 ... 90%

NL230 V +

230 V

24 V 24 V

230 V 24 V

24 V 230 V

�

NF230A

SF230A

NF230A-S2

SF230A-S2

AC24...240V/DC24...125V

1 2

– +

N L

S1 S2 S3 S4 S5 S6

1 2

– +

N L

A =10% B=11 ... 90%

230 V +

230 V

24 V 24 V

230 V 24 V

24 V 230 V

�

NFA

SFA

NFA-S2

SFA-S2

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