N1-Switches, Tumbler, Disconnect, Explosionproof

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N N-28 Class I, Div. 1 and 2; Groups C,D Class II, Div. 1 and 2; Groups E,F,G Class III NEMA 7CD,9EFG Applications • For use in bulk material handling/ processing systems to monitor speeds of belt conveyors, screw conveyors, bucket elevators and rotating machinery. • Used where alarm or computer interface capabilities are needed. • For installation in steel mills, mining (ore and coal) operations, grain handling, chemical and plastic industries to protect elevators, feeders, and conveyors from speed related damage resulting from broken belts, overloads or belt slippage. • 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. • Used in Class I and II areas where flammable vapors or highly combustible dusts are present. • Designed to monitor material flow by sequencing the operation of multiple conveyors feeding a common bin or conveyor. • Used as overspeed switches to detect motor overrun conditions: Pick-up 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: Pick-up speed setting should be below normal operating speeds. The output relay will de-energize if operating speed falls below the setpoint. • Used as zero speed switch: When speed approaches zero (0.1 RPM), the output relay will de-energize. Features • Signal range: three settings available. (0.1-10 RPM; 1-100 RPM; 10-1000 RPM) •Adjustable time delay. (up to 45 sec) • Input power is applied to the speed responsive switch at all times. The switch then senses input shaft speed in either direction. Effective June, 2008 Copyright 2008 PAGE 28 AFSX Speed Responsive Switch 0.1–1000 RPM. AFSX300 Typical Application • When input shaft speed exceeds the pick-up set-point, the output relay is energized. • If shaft speed falls below 80-85% of the pick-up speed the relay will de-energize. • Clockwise or counter-clockwise rotation. • Senses speed changes as slight as 1%. • Operating temperatures are -50°F to 150°F. • 3/4” NPT standard, two conduit openings. • Radial load is 125 lb. maximum at center of the key. • Axial thrust load is 100 pound maximum. • Driving torque required is one inchpound maximum. • Flexible coupling accessory allows up to 7.5 degree misalignment, high shock resistance and eliminates transmission of thrust loads. 800-621-1506 www.appletonelec.com
Class I, Div. 1 and 2; Groups C,D Class II, Div. 1 and 2; Groups E,F,G Class III NEMA 7CD,9EFG Electrical Specifications • Input voltage is 105-135 VAC, 50-60 Hz. • Output is a double pole, double throw relay rated 5 Amp resistive at 120VAC, 5 Amp at 240 VAC, 5 Amp at 30 VDC. • Repeatability is +/-2% maximum at constant voltage and temperature. • Power consumption is 3 watts maximum. • Pulse sensor (solid state optoelectric infrared device) operating life is 25 years if constant operation is at maximum speed. • Pick-up speed is adjustable by setpoint potentiometer. Material Catalog Number Copper-free aluminum AFSX300 Optional Flexible Coupling This coupling will operate at up to a 7-1/2° axial misalignment with no significant life reduction. This unit features high shock resistance and eliminates transmission of lateral thrust 3/8" from one shaft to the other (no e n d thrust). Sleeve: With axially molded internal 3” teeth. 1-5/8" rein- 5/8" Bore Made of neoprene with textile 1-11/16" forcement. T w o end fittings grooved to mate with sleeve teeth. One fitting attached to each shaft. AFSC1 Effective June, 2008 Copyright 2008 2-3/4" AFSX Speed Responsive Switch 0.1–1000 RPM. • Drop-out RPM will be 10-15% lower than pick-up speed to account for normal fluctuations in actual operating RPM. • If a signal is required within 1-15% of the normal operating speed, consult factory for presetting. Standard Materials • Cast aluminum housing also available with corrosion resistant epoxy powder coat. • Shaft is stainless steel, 5/8” diameter, #11 Woodruff Key stainless steel hardware. • Flexible coupling is cast zinc. • Sleeve is neoprene with textile reinforcement. N-29 Standard Finishes • Standard enclosure is shot peened. Options • For epoxy powder coated switches, add suffix -G1. Accessories • Mounting Bracket: AFSA1, AFSB1, AFSB2, AFSB3. • Flexible coupling: AFSC1. • Coupling Guard: AFSG1. • Stub shaft: AFSS1. Compliances • UL Standards 508,698. Stub Shaft 3” threaded one end, keyed other end. With jam nut and 3/16” key. AFSS1 3” with Jam Nut and 3/16” Key 5/8” Dia. 800-621-1506 www.appletonelec.com PAGE 29 N
Page 1 and 2: N1 Series Tumbler Switch/ Circuit B
Page 3 and 4: Features: EFS Non-Sealed Tumbler Sw
Page 5 and 6: Class I, Div. 1 and 2, Groups B◊,
Page 7 and 8: Class I, Div. 1 and 2, Groups C,D C
Page 9 and 10: Front Cover Only Effective May, 200
Page 11 and 12: EDS Front Operated Tumbler Switches
Page 13 and 14: Class I, Div. 1 and 2 Groups C,D; C
Page 15 and 16: Applications • Listed for use in
Page 17 and 18: Class I, Div. 1 and 2 Groups C,D NE
Page 19 and 20: Applications • Functions as load
Page 21 and 22: Application Explosionproof disconne
Page 23 and 24: Class I, Div. 1 and 2 Group D Class
Page 25 and 26: AFUX Series Class I, Div. 1 and 2 G
Page 27: Typical Application Right End Unit
Page 31 and 32: AFAX Series Class I, Div. 1 and 2 G
Page 33 and 34: Breakaway Mount Designed especially
Page 35 and 36: NEMA 3,3R,4,4X,12 Applications •
Page 37 and 38: Non-Fused Class I, Div 2, Groups B,

N1-Switches, Tumbler, Disconnect, Explosionproof

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