The **M2RS-41-R/UL** is a high-performance **Step-Servo (Closed-loop Stepper) Motor** manufactured by **MOONS' Industries**. It belongs to the M2RS series, which integrates a motor and a high-resolution encoder to eliminate the common pitfalls of open-loop stepper systems, such as loss of steps. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Motor Type** | NEMA 17 Step-Servo (Closed-Loop) | | **Frame Size** | 42 mm (NEMA 17) | | **Holding Torque** | 0.40 - 0.50 N·m (Typical for 41-stack) | | **Feedback Device** | 20,000 counts/rev Incremental Encoder | | **Communication** | RS-485 (Modbus RTU) | | **Input Voltage** | 12 - 48 VDC | | **Certification** | UL Recognized | --- ### 2. Core Electronic Components & Features #### A. Integrated Encoder (Closed-Loop Control) The "RS" designation signifies a closed-loop system. Unlike standard steppers, this unit uses a 20,000-count-per-revolution encoder to: * Monitor shaft position in real-time. * Automatically correct for "lost steps" caused by sudden load changes. * Reduce motor heating by applying only the current required for the specific load. #### B. RS-485 Modbus Interface The electronics include a built-in communication port supporting **Modbus RTU**. This allows for: * **Multi-axis networking:** Up to 31 motors can be daisy-chained on a single bus. * **Direct Programming:** You can trigger motion profiles (S-curves, velocity, position) directly via software commands without an external pulse generator. #### C. Power Stage & Protection The internal drive circuitry is designed for high efficiency: * **Voltage Range:** Operates between 12-48V, providing flexibility for battery-operated or industrial 24V/48V rails. * **Protection Circuits:** Includes built-in safeguards against over-voltage, under-voltage, and over-current scenarios. --- ### 3. Wiring and Connectivity The M2RS-41-R/UL typically features two main connectors for its electronic interface: 1. **Power & I/O Connector:** * DC Power Input (+/-). * Digital Inputs (Pulse/Direction or configurable I/O). * Digital Outputs (Alarm/Fault signals). 2. **Communication Connector:** * RS-485 (A/B lines) for Modbus control. --- ### 4. Advantages of the "UL" Version The **UL** suffix indicates that the electronic insulation system and components meet Underwriters Laboratories safety standards. This is critical for machines being exported to the North American market, ensuring compliance with fire and electrical safety regulations. ---