Belimo SM24A-S User Manual

Technical data sheet SM24A-S
www.belimo.com SM24A-S • en-gb • 2022-07-18 • Subject to change 1 / 4
Damper actuator for adjusting dampers in
technical building installations
• Air damper size up to approx.4m²
• Torque motor20Nm
• Nominal voltageAC/DC24V
• ControlOpen/close, 3-point
• with integrated auxiliary switch
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
Auxiliary switch 1 x SPDT, 0...100%
Switching capacity auxiliary switch 1 mA...3 A (0.5 A inductive), AC 250 V
Connection supply / control Cable 1m, 3 x 0.75mm²
Connection auxiliary switch Cable 1m, 3 x 0.75mm²
Parallel operation Yes (note the performance data)
Functional data
Torque motor 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)
Mechanical interface Universal shaft clamp reversible 10...20mm
Position indication Mechanically, pluggable
Safety data
Protection class IEC/EN III, Safety Extra-Low Voltage (SELV)
Power source UL Class 2 Supply
Protection class auxiliary switch IEC/EN II, reinforced insulation
Degree of protection IEC/EN IP54
Degree of protection NEMA/UL NEMA2
Enclosure ULEnclosureType2
EMC CE according to 2014/30/EU
Low voltage directive CE according to 2014/35/EU
Certification IEC/EN IEC/EN60730-1 and IEC/EN60730-2-14
UL Approval cULus according to UL60730-1A, UL60730-2-14
and CAN/CSAE60730-1
The UL marking on the actuator depends on
the production site, the device is UL-compliant
in any case
Mode of operation Type 1.B
Rated impulse voltage supply / control 0.8kV
Rated impulse voltage auxiliary switch 2.5kV
Pollution degree 3

Belimo SM24A-S Specifications

General

Brand	Belimo
Model	SM24A-S
Category	Controller
Language	English

Summary

Technical Data Overview

Electrical Data

Covers nominal voltage, frequency, range, and power consumption specifications.

Functional Data

Details torque, motor rotation, manual override, and angle of rotation.

Safety and Environmental Data

Specifies protection classes, NEMA/UL ratings, certifications, environment, and weight.

Product Features and Accessories

Product Features

Highlights simple direct mounting, manual override, adjustable rotation, reliability, and signalling.

Electrical Accessories

Lists add-on electrical components like auxiliary switches and feedback potentiometers.

Mechanical Accessories and Installation

Mechanical Accessories

Details various mounting and connection accessories for the actuator.

Wiring Diagrams

Illustrates connection diagrams for open/close and 3-point control.

Operating Controls and Indicators

Explains the use of manual override, shaft clamp, and auxiliary switch.

Dimensions and Clamping

Spindle and Clamping Dimensions

Provides spindle length requirements and shaft clamping range details.