Appleton™ PN AFSC1

FLEX COUPLING SPEED SWITCH

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#8221; NPT standard, two conduit openings
Flexible coupling accessory allows up to 7.5° misalignment, high shock resistance and eliminates transmission of thrust loads

NEC and CEC Certifications and Compliances: Rated for Class I, Division 1 and 2, Groups C, D; Class II, Division 1 and 2, Groups F, G; Class III; NEMA 7CD, 9FG

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

Output: Double pole, double throw relay rated 5 Amp resistive at 120 Vac, 5 Amp at 240 Vac, 5 Amp at 30 Vdc

Pulse Sensor: Solid state opto-electric infrared device. Operating life is 25 years if constant operation is at maximum speed

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