The **M2SBS-212-R/N** is a specific model of an **Electromagnetic Brake** (clutch-brake type) manufactured by **Miki Pulley**. This component is widely used in industrial automation to control the motion of shafts through electrical signals. --- ### 1. Technical Specifications The part number indicates a specific configuration involving size, torque capacity, and mounting style. | Feature | Specification | | :--- | :--- | | **Manufacturer** | Miki Pulley | | **Type** | Electromagnetic Micro-clutch / Brake | | **Voltage** | Typically 24V DC (Standard for N/R series) | | **Torque Rating** | ~0.4 Nm to 2.0 Nm (Size dependent) | | **Bore Size** | 12mm (Indicated by "12") | | **Response Time** | High-speed engagement/disengagement | ### 2. Electronic Operating Principle The unit operates on the principle of **Electromagnetism**. * **Coil Assembly:** Inside the stationary field is a copper wire coil. When a DC voltage (usually 24V) is applied, it creates a magnetic field. * **Armature Movement:** The magnetic flux pulls an armature plate across a small air gap against a leaf spring. * **Friction Engagement:** The armature makes contact with the rotor (clutching) or the brake hub (braking), transferring or stopping rotational torque via friction. * **De-energization:** When power is cut, the leaf spring pulls the armature back, instantly releasing the connection. ### 3. Key Electronic Components 1. **Stator (Magnet Body):** Contains the epoxy-resin encapsulated coil. It is designed to dissipate heat generated by electrical resistance. 2. **Friction Facings:** Non-asbestos materials designed for high wear resistance and stable friction coefficients even at high temperatures. 3. **Lead Wires:** Standard two-wire DC connection. Polarity is generally not critical for basic operation unless a diode-protected circuit is used. ### 4. Circuit Protection Requirements To ensure the longevity of the electronic parts, the following must be considered: * **Surge Suppression:** Because the coil is an inductor, it generates a "back-EMF" spike when turned off. A **Varistor** or a **Flyback Diode** should be installed in the control circuit to protect switching transistors or PLC outputs. * **Overexcitation:** In some high-speed applications, a specialized "Overexcitation Power Supply" is used to provide a momentary high-voltage burst to speed up the magnetic field buildup. --- ### Common Applications * **Paper Handling:** Printers and copiers for paper feed timing. * **Packaging:** Labeling machines where precise start/stop positioning is required. * **Conveyors:** Small-scale sorting systems.