The **MLS-D5W-R** is a specific model of a **Magnetic Proximity Sensor** (often referred to as a magnetic switch or reed switch) commonly used in industrial automation, specifically for pneumatic cylinder position sensing. Below is a detailed breakdown of its electronic characteristics and technical specifications. --- ### 1. General Specifications The MLS-D5W-R is designed to detect the magnetic ring inside a pneumatic cylinder to provide feedback on the piston's position. | Feature | Specification | | :--- | :--- | | **Sensor Type** | Magnetic / Reed Switch | | **Output Type** | SPST (Single Pole Single Throw), Normally Open (NO) | | **Operating Voltage** | 5V to 240V AC/DC | | **Switching Current** | 100mA Max | | **Contact Rating** | 10W Max | | **Internal Voltage Drop** | 3.5V Max | | **Indicator Lamp** | Red LED (Standard) | --- ### 2. Internal Components and Construction The device consists of several key electronic parts housed in a compact resin-filled casing: * **Reed Switch:** The core component consisting of two flexible metal reeds. When a magnetic field (from the cylinder piston) approaches, the reeds pull together to complete the circuit. * **LED Indicator:** A small light-emitting diode wired in series with a resistor. It illuminates when the circuit is closed, allowing for easy visual troubleshooting. * **Protection Diode/Varistor:** Many models in this series include internal surge protection to prevent damage from inductive kicks when switching solenoid valves. * **PVC Cable:** Usually a 2-wire oil-resistant cable (Brown for Positive/Live, Blue for Negative/Load). --- ### 3. Wiring Diagram (Electronic Interface) Because the MLS-D5W-R is a 2-wire switch, it is wired in series with the load (e.g., a PLC input or a small relay). ```text [Power Source (+)] ---- (Brown Wire) [ MLS-D5W-R ] (Blue Wire) ---- [ Load/PLC Input ] ---- [Power Source (-)] ``` > **Note:** Since it is a 2-wire device, it has a small "leakage current" even when off and a "voltage drop" when on. Ensure your PLC input threshold is compatible with a ~3.5V drop. --- ### 4. Application Environments * **Pneumatic Cylinders:** Specifically designed for "D-shaped" or T-slot grooves. * **Logic Controllers:** Providing "End of Stroke" signals to a PLC. * **Safety Interlocks:** Ensuring a machine part is in the correct position before the next sequence begins. ---