Limit Switch
a limit switch is a switch operated by the motion of a machine part or the presence of an object. A limit switch can be used for controlling machinery as part of a control system, as a safety interlock, or as a counter enumerating objects passing a point.
Key Features
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Actuator
A physical component that moves when an object comes into contact with it, initiating the switch's operation.
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Contact System
Contains normally open (NO) and normally closed (NC) contacts that make or break an electrical circuit when triggered.
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Adjustable Actuator
The actuator, such as a lever, can often be adjusted to set the exact point at which the switch activates.
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Switch Block & Housing
Encloses the internal switch contacts and wiring, providing protection from the environment and mechanical stress.
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High Mechanical Strength
Robust construction, often using materials like aluminum alloy, is used for the housing and thick actuator shafts to withstand physical impacts.
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Environmental Resistance
Features like oil seals and O-ring seals provide waterproofing, oil-proofing, and dust-proofing for use in tough industrial environments.
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Long Service Life
Designs can incorporate features like two-bearing shaft supports to extend the life of frequently used components.
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An internal operating mechanism provides stable contact pressure, contributing to high reliability and resistance to vibration and impact.
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Versatile Mounting
The design often accommodates standard electrical conduit, allowing for easy installation in various applications.
Primary Functions
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Position Sensing
Detects the position of a mechanical component or the presence/absence of an object.
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Mechanical Motion Control
Controls the start, stop, or adjustment of machinery based on an object's position.
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Safety & Over-travel Protection
Prevents mechanical damage by stopping machinery at designated points before an object moves too far.
