Appleton™ AFA and AFAX Conveyor Belt Alignment Switches

Appleton

Appleton™ AFA and AFAX Conveyor Belt Alignment Switches

Appleton

Appleton™ post style or large roller style conveyor belt alignment switches are used in the control circuit of magnetic motor starters to shut down motor driven conveyors in case of abnormal belt misalignment or run off. They provide an emergency stop switch for convey or lines and bulk handling systems which become misaligned or run off their tracks due to excessive speed, uneven load, leveling, breakage or other problems. The AFA Series is for use in industrial areas. The AFAX Series is for use in hazardous areas.

Specifications

AFAX Series NEC and CEC Certifications and Compliances
Class I, Division 1 and 2, Groups C, D; Class II, Division 1 and 2, Groups E, F, G; Class III; NEMA 7CD, 9EFG
AFA Series NEC and CEC Certifications and Compliances
NEMA 3, 4, 4X, 12
Standard Materials and Finishes
AFA10, AFA20, AFAX10, AFAX20: cast aluminum housing with peened finish. Actuating arm is red epoxy coated steel roller with stainless steel shaft. stainless steel hardware. AFA1, AFA2, AFAX1, AFAX2: steel coated with enamel paint
Option Finish
Epoxy powder coated switches for AFA10, AFA20, AFAX10 and AFAX20. See catalog pages for details
Standard Conduit Opening
AFA10, AFA20, AFAX10, AFAX20: One 3/4'' NPT. AFA1, AFA2, AFAX1, AFAX2: One 1/2'' NPT
Operating Temperature
AFA1, AFA2, AFAX1, AFAX2: -40 °C to +65 °C (-40 °F to +149 °F)
Options for AFA1, AFA2, AFAX1, AFAX2
Breakaway mounting bracket. Breakaway mounting bracket with switch. Breakaway mounting bracket with explosionproof switch. See catalog pages for details

Features

  • Used where alarm or computer interface capabilities are needed
  • Unit is used in pairs with one switch placed on each side of the conveyor belt. Recommended installation locates switches near the tail and head pulleys on conveyors 91.44 meters (300 feet) and longer
  • Post style or large roller style
  • AFAX Series is used in Class I and II areas where flammable vapors or highly combustible dusts are present
  • AFA Series has a gasketed cover rated for NEMA 3, 3R, 4, 4X
  • AFA10, AFA20, AFAX10, AFAX20: Each unit can be equipped with two micro switches to produce signals indicating belt misalignment at two deviation points. The first signal point could indicate small belt deviations by sounding an alarm. The second signal point could guard against extreme belt runoff by shutting down the conveyor
  • AFA10, AFA20, AFAX10, AFAX20: Operating arm has 247.65 mm (9.75'') high and 31.75 mm (1.25')' diameter roller and moves 90 degrees in both directions. Spring loaded arm returns to original position when belt is realigned.
  • AFA1, AFA2, AFAX1, AFAX2: Roller is 3.5'' high and actuates with 0.25'' travel. Unit should be mounted about 1'' from belt to eliminate false signals

Documents & Drawings