The **PNS-2B-R** is a specific electronic component typically identified as a **Limit Switch** or **Proximity Sensor accessory**, often associated with industrial automation brands like *Panasonic (formerly Sunx)* or *NIDEC*. Below is a technical breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications The PNS-2B-R is generally categorized as a **Standard Actuator Limit Switch**. It is designed to convert mechanical motion into an electrical signal to control machinery or count objects. | Feature | Specification | | :--- | :--- | | **Component Type** | Limit Switch / Micro Switch | | **Contact Configuration** | SPDT (Single Pole Double Throw) | | **Actuator Type** | Short Hinge Roller Lever | | **Termination Style** | Solder Terminals / Quick Connect | | **Mounting Type** | Chassis Mount (Side mounting holes) | --- ### 2. Electrical Characteristics The internal mechanism is designed to handle control-level voltages and currents. * **Rated Voltage:** Typically supports up to 250V AC. * **Current Rating:** Usually rated for **5A to 10A** depending on the specific inductive or resistive load. * **Contact Resistance:** Low initial resistance (typically < 50mΩ) to ensure signal integrity. * **Insulation Resistance:** High threshold (usually > 100MΩ at 500V DC) to prevent leakage. --- ### 3. Mechanical & Environmental Parts The durability of the PNS-2B-R comes from its physical construction: 1. **Roller Lever:** The "R" in the suffix often denotes the **Roller**. This reduces friction when the switch is triggered by a cam or a moving sliding part. 2. **Housing:** Made of high-grade Phenolic or PBT plastic for heat resistance and electrical insulation. 3. **Return Spring:** A high-tension internal coil spring ensures the switch returns to its "Normal" state immediately after the force is removed. 4. **Ingress Protection (IP):** Usually rated at IP40 (basic dust protection), meaning it is intended for indoor or enclosed cabinet use. --- ### 4. Wiring Logic Since it is an SPDT switch, it contains three primary terminals: | Terminal Label | Function | Description | | :--- | :--- | :--- | | **COM** | Common | The entry point for the current. | | **NC** | Normally Closed | The circuit is complete when the lever is NOT pressed. | | **NO** | Normally Open | The circuit completes only WHEN the lever is pressed. | --- ### 5. Common Applications * **End-stop detection:** Preventing a CNC axis or 3D printer head from moving too far. * **Safety Interlocks:** Ensuring a machine door is closed before operation. * **Conveyor Counting:** Triggering a pulse every time a box passes over the roller. ---