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Allen-Bradley 800FM-KM21 2-Position Key Selector Switch

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Allen-Bradley 800FM-KM21

by Allen-Bradley

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OverviewThe Allen-Bradley 800FM-KM21 is a high-grade 2-position key selector switch specifically engineered for demanding industrial control applications. This sturdy metal switch, a component of the acclaimed Allen-Bradley 800F series, delivers exceptional resilience and trustworthy performance in the most challenging industrial settings. Built for maintained operation, it offers consistent control settings, with the added security of left-side key removal and a standard key code of 3825. This ensures safe access management and reliable operation, making it a crucial element for precise and secure control in industrial automation and safety systems. Its superior construction and intelligent design make the 800FM-KM21 an excellent choice for professionals seeking enduring, high-performance control solutions.Key Features Sturdy Metal Construction: Ensures outstanding durability and an extended operational lifespan, even in severe industrial conditions. 2-Position Maintained Action: Provides stable and consistent control states, preventing accidental changes and ensuring dependable system functionality. Left-Side Key Removal: Improves security by allowing the key to be withdrawn only from the left position, which is essential for access control and lockout procedures. Standard Key Code 3825: Guarantees compatibility and standardization across various Allen-Bradley systems, simplifying key management. Enhanced Operational Security: Deters unauthorized access and interference, safeguarding both equipment and personnel. Industrial-Grade Dependability: Manufactured to Allen-Bradley's rigorous quality standards, ensuring consistent performance and minimal downtime. Effortless Integration: Designed for seamless incorporation into both existing and new industrial control panels and systems. Technical Specifications Brand: Allen-Bradley Series: 800F Model: 800FM-KM21 Type: Key Selector Switch Positions: 2 Operation: Maintained Key Removal Position: Left Key Code: 3825 (Standard) Material: Metal Application: Industrial control, automation, and safety systems Applications Machine and Process Control Panels: Provides crucial ON/OFF or operational mode selection for diverse industrial machinery. Access Control in Industrial Settings: Limits operational access to authorized personnel, thereby increasing safety and security. Equipment Lockout and Security Functions: Integrates into safety systems for secure equipment isolation and prevention of accidental startups. Operator Control Stations: Serves as a vital interface for operators to manage and supervise intricate industrial processes. Material Handling Systems: Ensures regulated operation and safety in conveyor systems and automated warehouses. Building Management Systems: Can be utilized for secure control of HVAC, lighting, and access within industrial facilities. Why Choose This Model? Exceptional Endurance: The robust metal construction ensures the 800FM-KM21 can withstand the most rigorous industrial conditions, offering longevity and reducing replacement expenses. Advanced Security Features: With left-side key removal and a standard key code, this switch offers superior security, preventing unauthorized operation and protecting valuable assets. Reliable Functionality: As an Allen-Bradley product, the 800FM-KM21 guarantees the consistent, maintained operation vital for critical industrial applications, minimizing downtime and maximizing output. Smooth Integration: Designed for compatibility within the Allen-Bradley 800F series and broader industrial automation ecosystems, making installation and system expansion straightforward. Trusted Brand Quality: Benefit from Allen-Bradley's reputation for innovation and excellence in industrial control, ensuring investment in a component that meets strict industry standards. Versatile Use: Its design makes it suitable for a wide array of applications, from machine control to access management, offering flexibility for various industrial requirements. Order NowElevate your industrial control systems by integrating the Allen-Bradley 800FM-KM21 key selector switch today. Contact us to place your order or to learn more about how this premium component can enhance your operational security and efficiency.FAQWhat are the primary applications of the Allen-Bradley 800FM-KM21?The 800FM-KM21 is frequently utilized in machine and process control panels, industrial access control, equipment lockout functions, operator control stations, material handling systems, and building management systems due to its robust design and security features.How does the left-side key removal feature enhance security?Left-side key removal ensures that the key can only be extracted when the switch is in a specific, designated position. This feature is crucial for preventing unauthorized changes to control settings and for implementing secure lockout procedures to protect personnel and equipment.What is the benefit of the standard key code 3825?The standard key code 3825 ensures consistent compatibility across different Allen-Bradley systems, simplifying key management and allowing for interchangeability without compromising security. This standardization is beneficial for large industrial operations with multiple control points.Is the Allen-Bradley 800FM-KM21 suitable for harsh industrial environments?Yes, its robust metal construction and industrial-grade reliability make the 800FM-KM21 ideally suited for harsh industrial environments, as it is designed to withstand extreme conditions and heavy usage while maintaining consistent performance.Can this switch be easily integrated into existing control systems?The 800FM-KM21 is designed for seamless integration into both new and existing industrial control panels and systems. Its compatibility with the Allen-Bradley 800F series and broader automation ecosystems simplifies installation and system expansion.

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PRODUCT DETAILS

Allen-Bradley 800FM-KM21

Overview

This is a genuine Allen-Bradley component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Allen-Bradley catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Allen-Bradley automation ecosystem

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Allen-Bradley platform with documented conversion notes

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Brand: Allen-Bradley
  • Series: 800F
  • Model: 800FM-KM21
  • Type: Key Selector Switch
  • Positions: 2
  • Operation: Maintained
  • Key Removal Position: Left
  • Key Code: 3825 (Standard)
  • Material: Metal
  • Application: Industrial control, automation, and safety systems

Applications

  • Machine and Process Control Panels: Provides crucial ON/OFF or operational mode selection for diverse industrial machinery.
  • Access Control in Industrial Settings: Limits operational access to authorized personnel, thereby increasing safety and security.
  • Equipment Lockout and Security Functions: Integrates into safety systems for secure equipment isolation and prevention of accidental startups.
  • Operator Control Stations: Serves as a vital interface for operators to manage and supervise intricate industrial processes.
  • Material Handling Systems: Ensures regulated operation and safety in conveyor systems and automated warehouses.
  • Building Management Systems: Can be utilized for secure control of HVAC, lighting, and access within industrial facilities.

Why Choose the 800FM-KM21?

  • Exceptional Endurance: The robust metal construction ensures the 800FM-KM21 can withstand the most rigorous industrial conditions, offering longevity and reducing replacement expenses.
  • Advanced Security Features: With left-side key removal and a standard key code, this switch offers superior security, preventing unauthorized operation and protecting valuable assets.
  • Reliable Functionality: As an Allen-Bradley product, the 800FM-KM21 guarantees the consistent, maintained operation vital for critical industrial applications, minimizing downtime and maximizing output.
  • Smooth Integration: Designed for compatibility within the Allen-Bradley 800F series and broader industrial automation ecosystems, making installation and system expansion straightforward.
  • Trusted Brand Quality: Benefit from Allen-Bradley's reputation for innovation and excellence in industrial control, ensuring investment in a component that meets strict industry standards.
  • Versatile Use: Its design makes it suitable for a wide array of applications, from machine control to access management, offering flexibility for various industrial requirements.

Availability & Shipping

  • In stock: 800FM-KM21 ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every 800FM-KM21 ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Allen-Bradley

The 800FM-KM21 is frequently utilized in machine and process control panels, industrial access control, equipment lockout functions, operator control stations, material handling systems, and building management systems due to its robust design and security features.

Machine down? We ship parts the same day.

New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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