The **LCS-122-R** is a specific model of a **Limit Switch**, commonly used in industrial automation, CNC machinery, and consumer electronics like 3D printers or microwave ovens. It is designed to detect the physical presence or position of an object through mechanical contact. Below is a breakdown of its electronic components and specifications. --- ### 1. Key Component Specifications The LCS-122-R is typically classified as a **Subminiature Snap Action Switch**. | Feature | Specification | | :--- | :--- | | **Actuator Type** | Short Roller Lever | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Contact Rating** | Usually 0.1A to 5A (depending on voltage) | | **Operating Force** | ~150gf (grams-force) | | **Terminal Type** | Right-angle PCB terminals (the "-R" suffix) | | **Switch Function** | Momentary (On-Mom) | --- ### 2. Internal Electronic Structure The device operates on a **Snap Action** mechanism, which ensures high reliability and fast switching speeds regardless of the speed of the physical trigger. * **COM (Common):** The input terminal where the power source is connected. * **NC (Normally Closed):** The circuit is complete when the lever is at rest. * **NO (Normally Open):** The circuit is completed only when the roller lever is pressed. * **The Spring Mechanism:** A beryllium copper or stainless steel spring provides the "snap" that prevents electrical arcing and ensures a clean signal. --- ### 3. Pinout Configuration The **-R** in the model name specifically refers to the **Right-Angle PCB mounting**. This means the metal pins are bent at 90 degrees to allow the switch to sit vertically or horizontally on a printed circuit board. | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | **COM** | Main power/signal entry. | | 2 | **NC** | Connected to COM when the switch is idle. | | 3 | **NO** | Connected to COM when the switch is triggered. | --- ### 4. Common Applications * **End-stops:** Used in 3D printers and CNC machines to define the "Home" position (0,0,0). * **Safety Interlocks:** Detecting if a door or panel is closed before a machine starts. * **Logic Triggering:** Sending a digital "High" or "Low" signal to a microcontroller (like an Arduino or PLC). ---