The **M2RS-45-R2** is a high-performance **Step-Servo Motor (Integrated Motor)** manufactured by **Leadshine**. It combines a stepper motor with an internal high-resolution encoder and a digital drive into a single, compact package. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Motor Type** | NEMA 17 Integrated Step-Servo | | **Input Voltage** | 20 - 36 VDC | | **Holding Torque** | 0.45 N.m (63.7 oz-in) | | **Communication** | RS485 (Modbus RTU) | | **Encoder Resolution** | 4,000 pulses/revolution (1,000 lines) | | **Frame Size** | 42mm (NEMA 17) | | **Protection Level** | IP20 | --- ### 2. Main Electronic Components The M2RS-45-R2 consists of three primary integrated layers: #### A. The Digital Drive (Controller Layer) The back of the motor contains the power electronics. It uses **FOC (Field Oriented Control)** technology to manage the current. Unlike traditional open-loop steppers, this drive adjusts the current based on the actual load, which prevents the motor from stalling and reduces heat. #### B. The Integrated Encoder (Feedback Layer) A magnetic or optical encoder is mounted on the rear shaft. It constantly monitors the rotor's position. * **Closed-Loop Control:** If a position deviation occurs, the electronics immediately compensate. * **No Loss of Step:** This eliminates the most common failure point in standard stepper systems. #### C. RS485 Communication Interface The "R2" suffix specifically refers to the communication protocol. * It supports **Modbus RTU** over RS485. * Users can control up to 31 axes via a single serial port. * It allows for motion commands like "Profile Position," "Profile Velocity," and "Homing" without needing high-speed pulse trains from a PLC. --- ### 3. Wiring and Pin Definition The motor typically features two main connector groups: 1. **Power Connector:** * **V+:** DC Power input (24V recommended). * **GND:** Power ground. 2. **Signal/Communication Connector:** * **RS485-A / RS485-B:** Differential signals for Modbus communication. * **Digital Inputs/Outputs:** Usually includes specialized pins for Configurable I/O (like limit switches or alarms). --- ### 4. Advantages of this Electronic Design * **Reduced Wiring:** No need for long cables between the motor and a separate drive cabinet. * **Space Saving:** Ideal for compact machines or multi-axis systems. * **Lower Heat:** The intelligent current control only provides the torque needed for the specific load. * **Diagnostic Capabilities:** Errors (over-voltage, over-current, position following error) can be read directly via software.