The **EMMS-AS-70-MK-HS-RMB** is a high-performance AC synchronous servo motor manufactured by **Festo**. It is designed for precise positioning and motion control applications. --- ## Technical Specifications Breakdown The alphanumeric code provides specific details about the motor's electronic and mechanical construction: | Code Segment | Description | Details | | :--- | :--- | :--- | | **EMMS-AS** | Product Series | AC Synchronous Servo Motor | | **70** | Flange Size | 70 mm frame size | | **MK** | Length | Medium length (Stack size) | | **HS** | Speed/Winding | High Speed (Optimized for RPM over torque) | | **R** | Feedback Type | Absolute Encoder, Multi-turn (Inductive) | | **M** | Brake | Integrated holding brake (24V DC) | | **B** | Connection | Rotatable plug for flexible wiring | --- ## Key Electronic Components ### 1. The Stator and Winding (HS - High Speed) The "HS" designation indicates a specific winding configuration designed to minimize back-EMF (Electromotive Force) at high velocities. This allows the motor to maintain performance at higher RPMs compared to standard or "LS" (Low Speed) models. ### 2. Encoder System (R - Multi-turn) This part uses an **absolute inductive encoder**. * **Absolute:** It remembers its position even after power is lost. No "homing" sequence is required upon restart. * **Multi-turn:** It counts not only the 360° position within one rotation but also the total number of rotations (usually up to 4096 turns). * **Inductive Technology:** Resistant to magnetic interference and dust, making it more robust than optical encoders in industrial environments. ### 3. Integrated Holding Brake (M) The motor includes an internal electronic solenoid brake. * **Voltage:** Typically operates on **24V DC**. * **Safety Function:** It is a "spring-applied" brake, meaning it locks the shaft when power is removed (Fail-safe). It is used for holding a position, not for dynamic braking. ### 4. Thermal Protection The motor contains an internal temperature sensor (usually a **PTC or KTY84**) embedded in the windings. This sends a signal to the motor controller (e.g., Festo CMMT-AS) to shut down the system if the temperature exceeds safe thresholds (Class F insulation, up to 155°C). --- ## Electrical Interface The unit features a **Rotatable Plug (B)**. This allows for: * **Power Connection:** Pins for Phase U, V, W, and PE (Earth). * **Signal Connection:** Pins for the Encoder data (Hiperface or EnDat protocols), the 24V Brake control, and the Thermal Sensor. ---