The **M2ADS-2A1-R** is a specific part number belonging to a series of **Cabled Magnetic Sensors** (Proximity Switches), typically manufactured by companies like **STUCHI** or specialized industrial sensor providers. These are commonly used in automation for detecting the position of a piston within a pneumatic cylinder. --- ### 1. Technical Specifications Below are the primary electronic and physical characteristics of the M2ADS-2A1-R: | Feature | Specification | | :--- | :--- | | **Sensor Type** | Magnetic Reed Switch | | **Output Type** | SPST (Single Pole Single Throw), Normally Open (NO) | | **Voltage Range** | 5V - 120V AC/DC | | **Switching Current** | 100mA Max | | **Switching Power** | 10W / 10VA Max | | **Voltage Drop** | 3.5V Max | | **Indicator** | Red LED (indicates "closed" state) | | **Connection** | 2-Wire Cable (often ~2 meters) | --- ### 2. Electronic Component Breakdown #### A. The Magnetic Reed Switch The heart of this part is a glass-encapsulated reed switch. When a magnetic field (from a cylinder's internal magnet) comes into proximity, the two ferrous blades inside the glass tube pull together, completing the circuit. #### B. The LED Indicator Circuit Unlike a simple mechanical switch, the M2ADS-2A1-R includes an integrated LED. * **Purpose:** Provides visual feedback to technicians that the sensor has been triggered. * **Design:** It is wired in series with the switch. Because of this, there is a small voltage drop (approx. 3.5V) across the sensor when it is active. #### C. Protection Circuitry The "R" suffix often denotes specific protection or mounting styles. Internally, these sensors sometimes include a small resistor to limit current to the LED and protect the reed contacts from minor arcing. --- ### 3. Wiring Configuration Because this is a **2-wire** electronic part, it is wired in series with the load (e.g., a PLC input or a relay coil). ```markdown [ Power + ] ---- ( Brown Wire ) ---- [ M2ADS-2A1-R ] ---- ( Blue Wire ) ---- [ Load/PLC Input ] ---- [ Power - ] ``` **Caution:** Since it is a 2-wire device, it requires a minimum operating current to light the LED, and it will have a "leakage current" even when the switch is open. --- ### 4. Applications * **Pneumatic Cylinders:** Mounted in the "T-slot" or "C-slot" of an actuator to sense end-of-stroke. * **Limit Switching:** Used in small-scale factory automation to detect the presence of magnetic carriers. * **Safety Interlocks:** Detecting if a magnetic door or guard is closed.