Technical data sheet
Damper actuator NM24A-SR
Damper actuator for operating
air control dampers in ventilation
and air-conditioning systems for
building services installations
• For air control dampers up to
approx. 2 m2
• Torque 10 Nm
• Nominal voltage AC/DC 24 V
• Control: modulating DC 0 ... 10 V,
position feedback DC 2 ... 10 V
Technische Daten
Electrical data
Nominal voltage
Nominal voltage range
Power consumption In operation
At rest
For wire sizing
Connection
Functional data
Torque (nominal torque)
Control Control signal Y
Working range
Position feedback (Measuring voltage)
Position accuracy
Direction of rotation
Direction of rotation at Y = 0 V
Manual override
Running time
Sound power level
Position indication
Min. 10 Nm @ nominal voltage
DC 0 ... 10 V, typical input impedance 100 kΩ
DC 2 ... 10 V
DC 2 ... 10 V, max. 1 mA
±5%
Reversible with switch 0 / 1
at switch position 0
resp. 1
Gearing latch disengaged with pushbutton,
self-resetting
Max. 95° , limited on both sides
by means of adjustable, mechanical end stops
150 s
Max. 35 dB (A)
Mechanical, pluggable
Protection class
Degree of protection
EMC
Mode of operation
Ambient temperature range
Non-operating temperature
Ambient humidity range
Maintenance
III Safety extra-low voltage
IP54 in any mounting position
CE according to 89/336/EEC
Type 1 (to EN 60730-1)
–30 ... +50°C
–40 ... +80°C
95% r.H., non-condensating (EN 60730-1)
Maintenance-free
Dimensions
Weight
See «Dimensions» on page 2
Approx. 800 g
Angle of rotation
Safety
Dimensions / Weight
AC 24 V, 50/60 Hz
DC 24 V
AC/DC 19.2 ... 28.8 V
2 W @ nominal torque
0.4 W
4 VA
Cable 1 m, 4 x 0.75 mm2
Safety notes
!
• The damper actuator is not allowed to be used outside the specified field of application,
especially in aircraft or any other form of air transport.
• Assembly must be carried out by 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.
1
Modulating damper actuator AC/DC 24 V, 10 Nm
NM24A-SR
Product features
Mode of operation
Simple direct mounting
Manual override
Adjustable angle of rotation
High functional reliability
The actuator is controlled by means of a standard control signal DC 0 ... 10 V. It opens to the
position dictated by this signal. The measuring voltage U allows the damper position (0 ... 100%)
to be electrically indicated and serves as a follow-up control signal for other actuators.
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 operation is possible with the self-resetting pushbutton (the gearing latch remains
disengaged as long as the pushbutton is pressed).
Adjustable angle of rotation with mechanical end stops.
The actuator is overload-proof, requires no limit switches and automatically stops when the
end stop is reached.
Accessories
Electrical accessories
Mechanical accessories
Description
Data sheet
Auxiliary switch S..A..
Feedback potentiometer P..A..
Range controller SBG24
Positioner SG..24
Digital position indication ZAD24
T2 - S..A..
T2 - P..A..
T2 - SBG24
T2 - SG..24
T2 - ZAD24
Various accessories (clamps, shaft extensions etc.)
T2 - Z-NM..A..
Electrical installation
• Connection via safety isolating transformer.
• Other actuators can be connected in parallel.
Please note the performance data.
T
Notes
–
~
Wiring diagrams
+
Y
U
!
1
2
DC 0…10 V
DC 2…10 V
5
3
Dimensions [mm]
52
62
Dimensional drawings
Damper spindle
Length
Clamp on top
Clamp on bottom *
min. 40
min. 20
* Option (Accessory K-NA)
2
8 ... 26.7
8 ... 20
25
99
41
Data sheet T2-NM24A-SR • en • v1.4 • 09.2007 • Subject to modifications
80
124
NM..A..
2
1
1
2
≥ 40
8 ... 26.7
≥8
≤ 26.7
4
3
2
10
10
70214-00002.E
1
1
9 Nm
m
≈1m
1
m
≈1m
2
5
2
1
1
2
3
65°
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M2-NM..A.. • v2.1 • 01.2013
1/2
NM..A..
~
~
T
T
+
L
–
N
+
L
–
N
0
2
3
0
1
1
T
~
~
–
T
~
!
0
1
+
~
AC 24 V / DC 24 V
DC 48 ... 110 V
(NM72A..)
1
3
1
2
3
1
2
3
–
+
+
+
S1 S2 S3
T
2
–
~
1
+
~
0
1
2
3
+
S1 S2 S3
0
0...100%
NM24A..
NM72A..
AC 100 ... 240 V
!
NM24A-S..
NM24AP5..
N
L
L
N
L
L
1
2
3
1
2
3
1
S1 S2 S3
S1 S2 S3
0
1
0...100%
T
~
1
2
Y
U
+
3
DC 0…10 V
DC 2…10 V
5
NM24A-SR..
NM24A-MF..
1
2
SG..24
–
+
1
2
1
2
Y
U5
3
DC 0…10 V
DC 2…10 V
5
5
AC 24 V / DC 24 V
(NM24A-V / VR..)
1
SG..24
!
3
DC 0…10 V
MP
–
NM72A-SR..
N
L
T
AC 100 ... 240 V
Y
U
+
T
!
–
NM24A-MP..
T
DC 48 ... 110 V
(NM72A-SR..)
0
1
2
1
2
Y
U5
3
~
–
T
AC 24 V / DC 24 V
S1 S2 S3
NM230A-S..
~
NM230A..
1
+
2
DC 0…10 V
DC 2…10 V
VR..
5
NM24A-V
NM230ASR..
2/2
M2-NM..A.. • v2.1 • 01.2013
NM24A-V / VR..
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