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SFA-(S) • Actuators with spring reset 20Nm

Servomotors with spring return for air volume safety dampers of up to 4 m² depending on the type of air valve and the pressure on the valves. This type is a multi-volt execution and has an electrical supply of 24-240V.

Simple direct mounting on the damper axe with a universal spindle clamp, supplied with an anti-rotation strap to prevent the actuator from rotating.
Type S2: With 2 integrated 0-100% auxiliary switches for adjustable signalization.

Brand

  • Belimo

Application

  • Safety dampers

Specifications

  • Torque 20 Nm
  • Nominal Voltage SFA-(S2) AC 24...240 V / DC 24...125 V
  • Control : open-close with spring return
  • Auxiliary switches: 2 x EPU, 1 mA … 3 (0.5) A, AC 250 V (1x fixed at 10%, 1x 10-90% adjustable)

Technical data

  • Power consumption:
  1. In operation: 6,5 W @ nominal torque SFA-(S2)
  2. At rest: 3.5 W SFA-(S2)
  3. For wire sizing: 18 VA SFA-(S2)
  • Direction of rotation: reversible by mounting
  • 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 motor: <75 s
  • Running time spring return: <60 s
  • Sound power level: max. 62 dB (A)

  • Degree of protection: IP54 in any mounting position

Electrical diagram

1: black

2: red

S1: violet

S2: red

S3: white

S4: orange

S5: pink

S6: grey
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