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SM A-SR • Actuators 20Nm modulating 0-10V

Servomotor for air volume control dampers of up to 4 m² depending on the type of air valve and the pressure on the valves. Simple direct mounting on the damper axe with a universal spindle clamp, supplied with an anti-rotation strap to prevent the actuator from rotating.

Brand

  • Belimo

Application

  • Dampers

Specifications

  • Torque 20 Nm
  • Nominal Voltage SM 230A-SR 230 V AC
  • Nominal Voltage SM 24A-SR 24 V AC/DC
  • Control: modulating standard control signal DC 0-10V, position feedback DC 2-10V. 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

Accessoires

  • Auxiliary switchs, type S1A (1) or S2A (2)
  • Shaft extension, type AV8-25
  • Positioners, type SGA24 / SGF24

Technical data

  • Power consumption:
  1. In operation: 2 W @ nominal torque SM 230A-SR / 2 W @ nominal torque SM 24A-SR
  2. At rest: 0.2 W SM 230A-SR / 0.4 W SM 24A-SR
  3. For wire sizing: 4 VA SM 230A-SR / 4 VA SM 24A-SR
  • Control:
  1. Control signal Y: DC 0-10 V, typical input impedance 100 kΩ
  2. Working range: DC 2-10 V
  • Position feedback (Measuring voltage): DC 2-10 V, max. 1 mA
  • Position accuracy: +/- 5%
  • Direction of rotation: reversible with switch 0 or 1
  • Manual override: gearing latch disengaged with pushbutton, self-resetting
  • Angle of rotation: max. 95° , limited on both sides by means of adjustable, mechanical end stops. The actuator is overload proof; requires no limit switches and automatically stops when the end stop is reached
  • Running time: 150 s
  • Sound power level: max. 45 dB (A)

  • Position indication: mechanical, pluggable

  • Degree of protection: IP54 in any mounting position

Wiring diagram

Electrical diagram

Text for tender

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  • The servomotor shall be of the modulating type with signal 0-10 V with torque of 20 Nm for direct mounting on the damper axe. With reversible direction of rotation, angle max 95° with mechanical end stops. Protection class II totally insulated, IP 54 in any mounting position EMC: CE according to 89/336/EEC, LVD 73/23/EWG.
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