The **M2RS-56-R2/UL** is a high-performance, 2-phase hybrid stepper motor part of the M2RS series, typically integrated with an encoder for closed-loop control. These motors are designed for precision motion control in industrial automation. --- ### 1. Key Technical Specifications The following table summarizes the primary electronic and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Motor Type** | 2-Phase Hybrid Stepper | | **Frame Size** | NEMA 23 (56mm) | | **Step Angle** | 1.8° (200 steps per revolution) | | **Rated Current** | 5.0 A per phase | | **Holding Torque** | 2.0 N.m (approx. 283 oz-in) | | **Resistance** | 0.45 Ω ± 10% | | **Inductance** | 1.8 mH ± 20% | | **Encoder Resolution** | 1000 lines (4000 counts/rev with 4x evaluation) | | **Compliance** | UL Certified | --- ### 2. Internal Electronic Components #### A. Stator and Rotor Construction The "Hybrid" designation means the motor combines the best features of **Variable Reluctance** and **Permanent Magnet** motors. - **Rotor:** Contains a permanent magnet and two serrated iron caps (teeth). - **Stator:** Features multiple poles with copper windings. When current flows through these windings, electromagnetic fields are created to pull the rotor teeth into alignment. #### B. Integrated Encoder The **-R2** suffix usually denotes the specific encoder configuration. - **Feedback Loop:** Unlike standard open-loop steppers, this unit provides real-time position feedback to a drive (like the RSM series). - **Signal Type:** Typically outputs A, B, and Z (index) channels. This prevents "loss of steps," a common failure in high-speed stepper applications. --- ### 3. Wiring and Connection The motor typically uses a 4-lead configuration for the motor phases and a separate multi-pin connector for the encoder signals. ```yaml Motor Phases: - Phase A: Red / Blue - Phase B: Green / Black Encoder Pins (Typical): - VCC: +5V DC - GND: 0V - EA+: Channel A Positive - EA-: Channel A Negative - EB+: Channel B Positive - EB-: Channel B Negative ``` --- ### 4. Application Advantages 1. **UL Certification:** The "/UL" suffix indicates it meets strict North American safety standards, making it suitable for medical devices and regulated industrial machinery. 2. **High Torque at Low Speed:** Ideal for applications requiring high holding power without a gearbox. 3. **Closed-Loop Capability:** When paired with a compatible driver, it operates more like a servo motor, reducing heat generation and noise.