Emerson Appleton
Emerson’s Appleton™ AFU and AFUX conveyor control switches are industrial-grade pull‑cord and lever emergency devices engineered for normal and explosion‑proof shutdown on conveyors, cranes, unloaders, and bulk‑handling systems.
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Product Overview
The AFU series features NEMA 4X die‑cast aluminum enclosures with pull cord or single/double lever actuation, suited for general industrial environments. The AFUX variants are designed for Class I/II hazardous areas (ATEX/IECEx) :contentReference[oaicite:7]{index=7}.
Key Features
- Rugged Construction: Cast‑aluminum body, stainless steel actuator shaft, robust torsion spring rated to 15 or 25 lbs :contentReference[oaicite:8]{index=8}.
- Distance Coverage: Supports spans up to ~200 ft (61 m) between switches :contentReference[oaicite:9]{index=9}.
- Electrical Ratings: Up to 15 A @ 600 VAC, UL/CSA approvals; AFUX versions certified for Class I/II Div1/2 environments :contentReference[oaicite:10]{index=10}.
Applications in Conveyor Safety
Used extensively in mining, steel plants, warehouses, loading docks, and crane systems. These switches allow rapid shutdown in emergencies and can signal alarms or integrate with PLCs :contentReference[oaicite:11]{index=11}.
Explosion‑Proof Variants
AFUX models include full sealing and flame‑path approvals for flammable dusts/vapors (NEC Class I/II Division 1 and 2), while AFU models cover NEMA 3/4/4X for general industrial use :contentReference[oaicite:12]{index=12}.
Conclusion
Appleton AFU/AFUX conveyor control switches provide reliable and rugged emergency stop solutions, available in both general‑purpose and hazardous‑location variants. Their mechanical durability, certification coverage, and flexibility make them a trusted choice for conveyor, crane, and bulk handling safety systems.