Appleton™ AFSX Speed Responsive Switch

Appleton

Appleton™ AFSX Speed Responsive Switch

Appleton

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.

Specifications

NEC and CEC Certifications and Compliances
Rated for Class I, Division 1 and 2, Groups C, D; Class II, Division 1 and 2, Groups E, F, G; Class III; NEMA 7CD, 9EFG
Standard Materials and Finishes
Cast copperfree (4/10 of 1% max.) aluminum housing with shot peened finish. Stainless steel, 5/8" diameter shaft, #11 Woodruff key and hardware. Cast zinc flexible coupling. Sleeve is neoprene with textile reinforcement
Options
Corrosion resistant epoxy powder coat finish on housing and/or switches. Mounting bracket and coupling guard available. See catalog pages for details
Operating Temperatures
-45 °C to +65 °C (-49 °F to +149 °F)
Radial Load
57 kilogram (125 pound) maximum at center of the key
Axial Thrust Load
45 kilogram (100 pound) maximum
Driving Torque
Required, one inch-pound maximum
Input Voltage
105-135 Vac, 50-60 Hz
Output
Double pole, double throw relay rated 5 Amp resistive at 120 Vac, 5 Amp at 240 Vac, 5 Amp at 30 Vdc
Repeatability
+/-2% maximum at constant voltage and temperature
Power Consumption
3 Watts maximum
Pulse Sensor
Solid state opto-electric infrared device. Operating life is 25 years if constant operation is at maximum speed
Pickup Speed
Adjustable by set point potentiometer
Drop-out RPM
Will be 10-15% lower than pickup speed to account for normal fluctuations in actual operating RPM
Presetting Option
If a signal is required within 1-15% of the normal operating speed, contact your local representative for presetting

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

Documents & Drawings