800FM-KM21

The Allen-Bradley 800FM-KM21 Position Key Switch is a versatile and reliable component in various automation applications. This maintained key switch is designed with a robust construction to ensure long-lasting performance in demanding industrial environments.

The 800FM-KM21 is part of the Allen-Bradley 800FM series, which features a compact design that saves valuable panel space. The switch has a round, maintained key with a knurled knob, providing a positive tactile feedback when actuated. This ensures accurate and consistent operation, making it suitable for use in applications requiring precise position control.

This position key switch is rated for a maximum voltage of 24 VDC and can handle a current of up to 1.5 A at 24 VDC. It is designed to operate reliably in temperatures ranging from -25 C to 70 C, making it suitable for a wide range of industrial applications.

The Allen-Bradley 800FM-KM21 Position Key Switch has a normally open (NO) contact configuration. When the key is in the actuated position, the contacts close, allowing current to flow through the switch. This makes it ideal for applications where you want to signal or activate another component when a specific position is reached.

The switch is designed with a sealed contact system, ensuring that it remains free from contaminants that could affect its performance. This feature makes it suitable for use in applications where dust, moisture, or other environmental factors could negatively impact the switch's operation.

The Allen-Bradley 800FM-KM21 Position Key Switch is easy to install and connect. It comes with mounting hardware and clear markings on the switch body, making it simple to position and label in your control panel. The switch terminals are accessible from the front, allowing for easy wiring and connection to other components.

In summary, the Allen-Bradley 800FM-KM21 Position Key Switch is a high-quality, reliable, and versatile component that is suitable for a wide range of industrial automation applications. Its robust construction, compact design, and reliable contact operation make it an excellent choice for controlling position in demanding environments.

Allan-Bradley 800FM-KM21 Position Key Switch: A Comprehensive Analysis

The Allan-Bradley 800FM-KM21 Position Key Switch is a popular choice for various industrial automation applications due to its reliability and durability. In this analysis, we will discuss the pros and cons of using this switch to help you make an informed decision.

1. Robust Design: The Allan-Bradley 800FM-KM21 Position Key Switch is built to withstand harsh environments, making it suitable for use in industrial applications. It features a rugged housing that protects against dust, water, and other contaminants.

2. Easy Installation: The switch can be easily mounted using the provided mounting hardware. Its compact size and versatile mounting options make it suitable for various installation configurations.

3. Long Operating Life: The switch has a long operating life due to its solid-state design and contact materials that are resistant to wear.

4. Versatile Applications: The 800FM-KM21 switch can be used for a wide range of applications, including control of motors, pumps, and conveyors. It can also be used as a failure detection device or as a safety interlock.

5. Self-Diagnostic Capabilities: The switch includes self-diagnostic capabilities, which allow it to detect and report any faults or failures. This helps prevent downtime and reduces maintenance costs.

1. Higher Cost: Compared to other types of switches, such as limit switches or proximity switches, the Allan-Bradley 800FM-KM21 Position Key Switch may have a higher initial cost.

2. Requires Proper Positioning: The switch must be properly positioned and aligned to ensure accurate operation. Failure to do so may result in incorrect switch readings.

3. Limited Operating Temperature Range: The switch has a limited operating temperature range of -40 F to 185 F (-40 C to 85 C). This may not be suitable for applications in extreme temperature environments.

The Allan-Bradley 800FM-KM21 Position Key Switch offers several advantages, including its robust design, easy installation, long operating life, versatile applications, and self-diagnostic capabilities. However, it also has some disadvantages, such as a higher initial cost, the requirement for proper positioning, and a limited operating temperature range.

If you are looking for a reliable and durable switch for industrial automation applications, the Allan-Bradley 800FM-KM21 Position Key Switch is a great choice. Its self-diagnostic capabilities, long operating life, and solid-state design make it an excellent investment for applications where downtime and maintenance costs are a concern. However, it is important to consider the switch's higher initial cost and the need for proper positioning before making a purchase. Additionally, if your application requires operation in extreme temperature environments, you may need to consider alternative switch options.

Details:

New Allen Bradley 800FM-KM21 2 position key switch maintained.

specifications indusswitch:

• brand: Allen-bradley
• mpn: 800fm-km21
• part type: Key Switch
• fuse type: Switch

shipping indusswitch:

• service: usps ground advantage
• carrier: usps
• transit: 3-7 days
• type: calculated
• class: standard

general indusswitch:

• category: Business & Industrial > Electrical Equipment Supplies > Selector Switches

seller indusswitch:

• # reviews: 4117
• rating: 100.0%
• city: camano island, washington

payments indusswitch:

• wallet: google-pay
• credit card: mastercard
• other

returns indusswitch:

• paid by: buyer
• policy: returns accepted
• method: money back
• time: 30 days

offer indusswitch:

• sold #: 10
• options: ship-to-home
• prices: $50.00–$184.66
• item condition:
  • New
  • New – Open box
  • Used
  • Seller refurbished
  • For parts or not working
• in stock #: 5
• availability: in stock
• started: june 1, 2026

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