200 EN/01.2019/G22 © STULZ GmbH – all rights reserved
ec tower technical manual
Technical data sheet SM24A-TP
Damper actuator for adjusting
dampers in technical building
installations
• Air damper size up to approx. 4 m²
• Nominal torque 20 Nm
• Nominal voltage AC/DC 24 V
• Control Open-close, 3-point
• with connecting terminals
Technical data
Electrical data Nominal voltage AC/DC 24 V
Nominal voltage frequency 50/60 Hz
Nominal voltage range AC 19.2...28.8 V / DC 19.2...28.8 V
Power consumption in operation 2 W
Power consumption in rest position 0.2 W
Power consumption for wire sizing 4 VA
Connection supply / control Terminals 4 mm² (cable Ø 4...10 mm, 3-wire)
Parallel operation Yes (note the performance data)
Functional data
Torque motor Min. 20 Nm
Direction of motion motor selectable with switch 0 (ccw rotation) / 1 (cw
rotation)
Manual override with push-button, can be locked
Angle of rotation Max. 95°
Angle of rotation note can be limited on both sides with adjustable
mechanical end stops
Running time motor 150 s / 90°
Sound power level motor 45 dB(A)
Spindle driver Universal spindle clamp reversible 10...20 mm
Position indication Mechanically, pluggable
Safety
Protection class IEC/EN III Safety Extra-Low Voltage (SELV)
Protection class UL UL Class 2 Supply
Degree of protection IEC/EN IP54
Degree of protection NEMA/UL NEMA 2, UL Enclosure Type 2
EMC CE according to 2014/30/EU
Certification IEC/EN IEC/EN 60730-1 and IEC/EN 60730-2-14
Certification UL cULus according to UL 60730-1A, UL 60730-2-
14 and CAN/CSA E60730-1:02
Mode of operation Type 1
Rated impulse voltage supply / control 0.8 kV
Control pollution degree 3
Ambient temperature -30...50°C
Non-operating temperature -40...80°C
Ambient humidity 95% r.h., non-condensing
Maintenance Maintenance-free
Weight
Weight 0.93 kg
Safety notes
• The device must not be used outside the specified field of application, especially not
in aircraft or in any other airborne means of transport.
• Outdoor application: only possible in case that no (sea)water, snow, ice, insolation
or aggressive gases interfere directly with the actuator and that is ensured that the
ambient conditions remain at any time within the thresholds according to the data
sheet.
• Only authorised specialists may carry out installation. All applicable legal or
institutional installation regulations must be complied during installation.
• 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.
www.belimo.eu
SM24A-TP • en-gb • 2016-11-01 • subject to changes
1
14.6 Installation instructions for louver damper servo motor
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