The **SES-164W-R/E2** is a specific model of an **Electromagnetic Brake** (clutch/brake unit), typically manufactured by companies like **Sinfonia** (formerly Shinko Electric). These components are critical in industrial automation for controlling rotation and ensuring safety through "fail-safe" mechanisms. --- ### 1. Technical Specifications The part number indicates a specific configuration of torque, voltage, and mounting style. Below is a breakdown of the typical electronic and mechanical characteristics for this series: | Feature | Specification (Typical) | | :--- | :--- | | **Type** | Electromagnetic Spring-Applied Brake | | **Rated Voltage** | 24V DC (Standard for E2 series) | | **Power Consumption** | Approx. 15W - 25W (varies by coil temp) | | **Static Torque** | Approx. 1.6 Nm to 4 Nm (model dependent) | | **Operation Mode** | Power-off activation (Fail-safe) | | **Response Time** | Fast (usually < 50ms) | --- ### 2. Key Electronic Components The internal construction of the SES-164W-R/E2 involves several key electronic/electromagnetic elements: #### A. Electromagnetic Coil (Stator) The heart of the unit is a copper wire coil encapsulated in a steel housing. - **Function:** When energized with 24V DC, it creates a magnetic field that overcomes the internal spring pressure. - **Resistance:** The coil has a specific Ohmic resistance; if the resistance is infinite, the coil is "open" (blown). #### B. Friction Discs and Armature - **Mechanical Interface:** When the power is **OFF**, heavy-duty springs push the armature against the friction disc, locking the shaft. - **Electronic Release:** When power is **ON**, the magnetic field pulls the armature away, allowing the shaft to rotate freely. #### C. Lead Wires and Insulation - **Connection:** Usually features two flying leads (Red/Black or White). - **Insulation Class:** Typically Class E or B, rated for temperatures up to 120°C-130°C to handle the heat generated by continuous energization. --- ### 3. Usage and Circuit Protection To integrate this part into an electronic system, the following precautions are usually required: 1. **Flyback Diode:** Since the brake is an inductive load, a diode must be placed in parallel (reverse-biased) to prevent voltage spikes from damaging the PLC or relay when the brake is switched off. 2. **Over-excitation (Optional):** Some advanced controllers use a high-voltage pulse to release the brake quickly, then drop to a lower "holding voltage" to reduce heat. 3. **Wear Monitoring:** In some "W" variants, microswitches can be added to electronically signal whether the brake is physically open or closed. --- ### 4. Common Applications * **Robotic Arms:** To hold positions when power is lost. * **Z-Axis Actuators:** Preventing gravity-induced "back-driving" in CNC machines. * **Conveyor Systems:** For precise emergency stopping.