The **M2RS-CD-R/CE** is a high-performance **Magnetic Induction Digital Output Speed Sensor** (often referred to as a proximity or speed pickup sensor), commonly used in industrial automation for monitoring the rotational speed of gears or shafts. --- ### 1. Technical Specifications The following table outlines the core electronic and physical characteristics: | Feature | Specification | | :--- | :--- | | **Output Type** | Push-Pull (Digital) | | **Operating Voltage** | 8 – 32 VDC | | **Frequency Range** | 1 Hz to 20,000 Hz | | **Operating Temperature** | -40°C to +125°C | | **Protection Class** | IP67 / IP69K (Waterproof/Dustproof) | | **Housing Material** | Stainless Steel (typically M12 or M18 threading) | | **Certification** | CE marked (compliant with EU safety/EMC standards) | --- ### 2. Core Electronic Components The internal architecture of the M2RS series consists of three primary stages: #### A. The Sensing Element (Hall Effect or AMR) Unlike simple passive VR (Variable Reluctance) sensors, the "CD-R" variant uses an active **Anisotropic Magneto-Resistive (AMR)** or **Hall Effect** bridge. This allows it to detect movement even at very low speeds (near 0 Hz), whereas passive sensors require high speeds to generate a signal. #### B. Signal Conditioning Circuitry The raw analog signal from the magnet is processed internally via: * **Schmitt Trigger:** Converts the sine-wave-like magnetic fluctuations into a clean, square-wave digital pulse. * **Temperature Compensation:** Ensures the switching point remains stable despite the heat generated by industrial machinery. #### C. Output Stage (Push-Pull) The **Push-Pull** output is a robust electronic configuration. It can both "source" (provide positive voltage) and "sink" (provide path to ground) current. This makes it compatible with almost all PLC (Programmable Logic Controller) inputs, whether they are NPN or PNP. --- ### 3. Wiring Configuration The device typically follows standard industrial coloring for its lead wires: ```yaml Brown: Positive Supply (+VCC, 8-32V) Blue: Negative/Ground (0V) Black: Signal Output (Square Wave) White: Inverted Signal (Only on specific 4-wire models) ``` --- ### 4. Key Applications * **Transmission Monitoring:** Measuring RPM of gears in heavy machinery. * **ABS Systems:** Detecting wheel speed in mobile hydraulics. * **Conveyor Systems:** Synchronizing belt speeds in factory automation.