Allen‑Bradley 2‑Position Keyed Selector Switch (800FM-KM21)
Allen‑Bradley 2‑Position Keyed Selector Switch (800FM-KM21)
The Allen‑Bradley 800FM‑KM21 is a compact, industrial‑grade 2‑position maintained keyed selector switch engineered for applications requiring controlled access and secure operation. Part of the trusted 800F/800FM family, this operator provides positive tactile feedback, long‑life durability, and reliable performance in demanding commercial and manufacturing environments.
The keyed mechanism prevents unauthorized operation, making it ideal for equipment modes such as Maintenance, Clean, Service, or Restricted Operation. Its modular design allows fast installation and seamless compatibility with existing 800F contact blocks.
Key Features
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2‑Position Maintained Keyed Selector — stays in position until manually changed
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Keyed Access Control — restricts operation to authorized personnel
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Compact 22.5 mm 800FM Form Factor
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High Mechanical Durability — designed for heavy‑use environments
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Compatible with 800F Contact Blocks
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Allen‑Bradley Industrial Reliability
Technical Specifications
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Series: 800FM
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Model: KM21
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Operator Type: 2‑Position Maintained (Keyed)
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Mounting Size: 22.5 mm
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Material: Industrial thermoplastic & metal
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Certifications: UL, CSA, CE compliant
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Key Type: Allen‑Bradley factory‑coded key set
Applications
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Lancaster CK‑Series frozen custard machines
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Restricted‑access machine modes
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Maintenance / Service mode selection
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Industrial control panels
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Equipment requiring secure operator input
Included
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800FM‑KM21 keyed selector switch operator
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Factory‑coded key set
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Mounting hardware
Compatibility
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Allen‑Bradley 800F/800FM contact blocks
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Standard 22.5 mm panel cutouts
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Lancaster Manufacturing control assemblies using AB keyed operators
