The **M2TS-70-R2/BN** is a specialized precision mechanical and electronic component, typically categorized as a **high-precision micro-switch** or a **touch sensor (Probe)**. These parts are frequently used in CNC machinery, industrial automation, and high-accuracy positioning systems. ### Technical Overview | Feature | Specification Details | | :--- | :--- | | **Component Type** | High-precision touch sensor / Tool setter | | **Manufacturer** | Often associated with **Metrol** (specialists in precision switches) | | **Accuracy / Repeatability** | Usually within 0.001mm (1 micron) | | **Contact Type** | Normally Closed (NC) or Normally Open (NO) depending on circuit | | **Protection Rating** | IP67 (Waterproof and Oil-resistant) | | **Material** | Stainless steel / Hardened alloy contact head | --- ### Key Electronic Components & Working Principle The "Electronic" nature of this device is found in its **Contact Mechanism**. Unlike a standard toggle switch, this is a "Transmitter" of position data. #### 1. The Contact Switch Internally, the M2TS series utilizes a high-precision mechanical contact. When the probe (plunger) is depressed by a physical object (like a CNC cutting tool), it breaks or completes an electrical circuit. #### 2. Signal Processing (The R2/BN Configuration) * **Signal Output:** The device sends a discrete electrical signal to a PLC (Programmable Logic Controller) or a CNC Controller (like Fanuc or Siemens). * **Voltage/Current:** These sensors typically operate on **DC 24V** with low current consumption (approx. 10mA) to ensure there is no electrical arcing that could damage the contact precision. * **LED Indicator:** Many versions include a built-in LED (indicated by the wiring logic) to show the "Triggered" state, allowing for visual troubleshooting. #### 3. Wiring Configuration The **BN** designation often refers to the cable or terminal type (e.g., Brown/Blue wire standards). * **Brown (V+):** Power supply. * **Blue (0V):** Ground. * **Black/White:** Signal output lines. --- ### Applications * **Tool Length Measurement:** Detecting the exact tip of a drill bit or end mill. * **Workpiece Positioning:** Determining the zero-point of a part before machining begins. * **Broken Tool Detection:** Checking if a tool has snapped during an automated cycle. --- ### Safety and Installation Notes 1. **Over-travel:** Always ensure the machine does not exceed the "Stroke" limit of the switch, or the internal electronic spring mechanism will be crushed. 2. **Cable Protection:** Since these are used in environments with metal chips and coolant, the cable must be oil-resistant (typically indicated by the "R" or "B" suffixes in the part number).