Emerson Appleton Speed Responsive Switch, AFSX
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Appleton™ AFSX Speed Responsive Switch

Brand: Appleton
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Appleton™ AFSX speed responsive switch is designed to monitor material flow by sequencing the operation of multiple conveyors feeding a common bin or conveyor.

It is for use in bulk material handling/processing systems to monitor speeds of belt conveyors, screw conveyors, bucket elevators and rotating machinery.

The AFSX is used where alarm or computer interface capabilities are needed. It is ideal for installation in mining and industrial areas where rugged control enclosures are needed for protection from falling ores, other heavy aggregates and from dripping water or hosedowns. 

It is rated for use in Class I and II areas where flammable vapors or highly combustible dusts are present.
Features
  • Ideal for installation in steel mills, mining (ore and coal) operations, grain handling and chemical and plastic industries to protect elevators, feeders, and conveyors from speed related damage resulting from broken belts, overloads or belt slippage
  • Used as overspeed switches to detect motor overrun conditions. Pickup speed should be set above normal operating speeds. The output relay will energize if operating speed exceeds the set point
  • Used as underspeed switches to detect slipping belts, jammed conveyors or equipment and stalled motors: Pickup speed setting should be below normal operating speeds. The output relay will de-energize if operating speed falls below the set point
  • Used as zero speed switch: When speed approaches zero (0.1 RPM), the output relay will de-energize
  • Signal range: three settings available (0.1-10 RPM; 1-100 RPM; 10-1000 RPM)
  • Adjustable time delay (up to 45 seconds)
  • Input power is applied to the speed responsive switch at all times. The switch then senses input shaft speed in either direction. Clockwise or counterclockwise rotation.
  • When input shaft speed exceeds the pickup set point, the output relay is energized
  • If shaft speed falls below 80-85% of the pickup speed the relay will de-energize
  • Senses speed changes as slight as 1%
  • 3/4" NPT standard, two conduit openings
  • Flexible coupling accessory allows up to 7.5° misalignment, high shock resistance and eliminates transmission of thrust loads

Specifications

Brand

Axial Thrust Load

  • 45 Kilogram (100 Pound) Max.

Driving Torque

  • Required 1 in-lb Max.

Input Voltage

  • 105-135 Vac, 50/60 Hz

NEC/CEC Certifications & Compliances

  • Class II, Div. 1 & 2, Groups E, F, G
  • Class III, NEMA 7CD, 9EFG
  • Class I, Div. 1 & 2, Groups C, D

Operating Temperatures

  • -45° to +65° C (-49° to +149° F)

Options

  • Mounting Bracket & Coupling Guard
  • Corrosion Resistant Epoxy Powder Coat Finish on Housing and/or Switches

Output

  • Double Pole, Double Throw Relay Rated 5 Amp Resistive at 120 Vac, 5 Amp at 240 Vac, 5 Amp at 30 Vdc

Power Consumption

  • 3 Watts Max.

Pulse Sensor

  • 25-Years Operating Life if Constant Operation is at Max.
  • Solid State Opto-electric Infrared Device

Radial Load

  • 57 Kilogram (125 Pound) Max.

Repeatability

  • ± 2% Max.

Standard Materials & Finishes

  • Shaft: Woodruff Key & Hardware: Stainless Steel
  • Flexible Coupling: Cast Zinc
  • Sleeve: Neoprene with Textile Reinforcement
  • Housing: Cast Copper-Free (4/10 of 1% Max.) Aluminum with Shot Peened Finish

Documentation

Catalogs

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