The **EMMS-AS-140-L-HS-RMB** is a high-performance AC synchronous servo motor manufactured by Festo. This specific model belongs to the EMMS-AS series, designed for precise positioning and dynamic movement in industrial automation. Below is a breakdown of its electronic and technical specifications. ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Motor Type** | AC Synchronous Servo Motor | | **Flange Size** | 140 mm | | **Length Code** | L (Long) | | **Winding Type** | HS (High Speed) | | **Feedback System** | Multi-turn Absolute Encoder (HIPERFACE®) | | **Brake Option** | RMB (Integrated Holding Brake) | | **Nominal Voltage** | 565 V DC | | **Rated Torque** | ~17.0 Nm to 21.0 Nm (Depending on cooling) | | **Protection Class** | IP65 (Housing and Connection) | --- ### 2. Electronic Components & Features #### A. Feedback System (Absolute Encoder) The motor utilizes a **multi-turn absolute encoder**. - **Function:** It tracks the exact position of the rotor within a single revolution and counts the number of total revolutions. - **Advantage:** Unlike incremental encoders, it does not require a "homing" run after a power failure; the controller immediately knows the motor's position. - **Interface:** Typically utilizes the **HIPERFACE®** protocol for high-resolution feedback. #### B. Integrated Holding Brake (RMB) The "RMB" suffix indicates a built-in electromagnetic holding brake. - **Operation:** It is a "fail-safe" brake, meaning it is engaged when power is removed. - **Purpose:** To hold the load in position during Emergency Stops or when the motor is de-energized, preventing vertical axes from dropping. - **Voltage:** Operates on **24V DC**. #### C. Power and Connection The motor features high-quality circular connectors for power and signal transmission. - **Power Connection:** Supplies the 3-phase AC power to the stator windings. - **Signal Connection:** Transmits encoder data and thermal sensor information. - **Thermal Monitoring:** Integrated **PTC or NTC sensors** monitor the winding temperature to prevent electronic burnout from overheating. #### D. Performance Characteristics The "HS" (High Speed) designation refers to the specific winding arrangement. - These windings are optimized for lower inductance to allow for higher RPMs at the rated DC bus voltage (565V), facilitating rapid cycle times in production lines. --- ### 3. Compatible Motor Controllers To operate this electronic motor, a servo drive (motor controller) is required. Festo recommends the **CMMP-AS** or **CMMT-AS** series. These controllers handle: 1. **Commutation:** Converting DC bus voltage into 3-phase AC power. 2. **Current Control:** Managing torque via vector control. 3. **Safety:** Implementing STO (Safe Torque Off).