The **M2SES-2BC-R2/N** belongs to a specialized series of industrial switches, typically manufactured by brands like **IDEC** or similar industrial control providers. This specific part number refers to a **2-position Key Selector Switch** from the M2SES series. Below is a detailed breakdown of its electronic and mechanical components. --- ### 1. Component Specifications The switch is designed for low-voltage control circuits, common in automation panels and machinery. | Feature | Specification | | :--- | :--- | | **Series** | M2SES (Miniature Industrial Series) | | **Switch Type** | Key Selector Switch | | **Positions** | 2-Position (e.g., ON-OFF or Mode A-Mode B) | | **Contact Configuration** | 2BC (Typically 2 Normally Closed/Slow-break contacts) | | **Action** | Maintained (Stays in the position it is turned to) | | **Key Removal** | R2 (Key removable in specific positions, often both) | | **Bezel/Color** | N (Standard black bezel / industrial finish) | --- ### 2. Electronic Parts & Construction The unit is modular, consisting of three primary sections: #### A. The Operator (Head) * **Lock Cylinder:** A precision-machined metal or high-impact plastic cylinder where the key is inserted. * **Key Coding:** Usually utilizes a standard or "random" keying system to prevent unauthorized operation. * **Cam Mechanism:** An internal rotating cam that translates the circular motion of the key into linear motion to actuate the contact blocks. #### B. The Contact Blocks (Electronic Interface) * **Contact Material:** Usually silver-nickel or gold-plated contacts to ensure low electrical resistance and prevent oxidation. * **Terminals:** Screw terminals or solder tabs designed for wiring. * **Rating:** Typically rated for **5A at 125V AC** or **3A at 250V AC**. For DC applications, they usually handle **2A at 30V DC**. #### C. Mounting & Housing * **Mounting Hole:** Usually fits a **16mm** or **22mm** circular cutout (depending on the specific sub-series variant). * **Insulation:** The housing is made of flame-retardant polyamide or polycarbonate to ensure dielectric strength between the terminals and the operator. --- ### 3. Application Use Cases * **Safety Interlocks:** Ensuring only authorized personnel can start a machine. * **Mode Selection:** Switching between "Manual" and "Auto" modes in a PLC circuit. * **Emergency Overrides:** Allowing a technician to bypass a system using a physical key. ---