The **EMMT-AS-150-LR-HT-R2MYB** is a high-performance AC synchronous servo motor manufactured by **Festo**. It is designed for demanding industrial automation tasks requiring high dynamic response and precision. --- ### 1. Technical Specifications Overview The electronic and electromechanical characteristics are summarized in the table below: | Feature | Specification | | :--- | :--- | | **Motor Type** | AC Synchronous Servo Motor | | **Flange Size** | 150 mm | | **Nominal Voltage** | 400 V - 560 V AC | | **Nominal Torque** | ~28.0 Nm (Specific to HT variant) | | **Peak Torque** | ~80.0 Nm | | **Nominal Speed** | ~2,500 - 3,000 RPM | | **Feedback System** | Absolute Encoder (Single-turn or Multi-turn) | | **Connection Technology** | Single Cable Solution (OCP/Hiperface DSL) | | **Protection Class** | IP67 (Housing/Shaft seal) | --- ### 2. Breakdown of the Model Code The alphanumeric string defines the specific electronic and physical configuration: 1. **EMMT-AS**: Series designation (Brushless AC Synchronous Motor). 2. **150**: Frame/Flange size (150 mm). 3. **L**: Overall length (Large/Long). 4. **R**: Rotation (Radial connection). 5. **HT**: High Torque winding configuration. 6. **R2**: Encoder Type (Digital absolute encoder, likely 19-bit or higher resolution). 7. **M**: Multi-turn encoder functionality (retains position after power loss). 8. **Y**: Integrated holding brake (Electronic release). 9. **B**: Standard shaft with feather key. --- ### 3. Key Electronic Components #### A. Digital Absolute Encoder (R2MY) This is the "brain" of the motor's feedback loop. * **Multi-turn Capability:** Uses an internal counter to track the number of full rotations, meaning the machine does not require a "homing" run after a power cycle. * **Protocol:** Likely utilizes a digital interface (like Hiperface DSL or EnDat) to transmit position, speed, and temperature data over a single cable. #### B. Integrated Holding Brake (Y) * **Function:** An electromagnetic spring-applied brake. * **Electronic Control:** Managed by the motor controller (Servo Drive). When power is cut, the brake engages to hold the load in place, preventing gravity-induced drops in vertical axes. #### C. Single Cable Technology (OCP) * Instead of separate cables for power and feedback (encoder), this motor uses **One Cable Plug (OCP)** technology. * **Benefits:** Reduces wiring complexity, minimizes electromagnetic interference (EMI) issues, and lowers installation costs. #### D. Thermal Protection * The motor contains integrated **PTC or NTC temperature sensors** embedded in the stator windings. * These sensors communicate directly with the servo drive to trigger an emergency stop or power derating if the motor exceeds its thermal limit (Class 155/F insulation). --- ### 4. Compatibility This motor is electronically matched for use with the **CMMT-AS** series of universal servo drives from Festo. The "Electronic Identification Plate" inside the motor allows the drive to automatically upload all motor parameters (inductance, resistance, inertia) upon connection.