The **M2RS-5E-R2** is a high-performance **Step-Servo Motor (Integrated Motor)** developed by Leadshine. It combines a two-phase stepper motor with an internal high-resolution encoder and a digital drive into a single package. ### 1. Key Technical Specifications The following table highlights the core electronic and mechanical parameters of the M2RS-5E-R2: | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 24 - 48 VDC | | **Peak Current** | 0.5 - 7.0 A | | **Holding Torque** | 2.0 N.m (Newton-meters) | | **Encoder Resolution** | 4000 PPR (Pulses Per Revolution) | | **Communication Interface** | RS485 / Modbus RTU | | **Step Angle** | 1.8° (Full Step) | | **Protection Level** | Over-voltage, Over-current, Position Error | --- ### 2. Core Electronic Components & Features The "Electronic Parts" of this integrated motor are divided into three functional blocks: #### A. The Integrated Driver (The "Brain") Unlike traditional steppers that require an external drive in a control cabinet, the M2RS-5E-R2 has a built-in PCB located at the back of the motor. * **32-bit DSP Technology:** Uses a Digital Signal Processor to calculate motion profiles and current loops in real-time. * **Closed-Loop Control:** Eliminates the "loss of steps" common in open-loop steppers by constantly comparing the target position to the actual position. * **Modbus RTU Support:** It communicates via RS485, allowing a PLC or PC to control up to 31 axes using only two wires. #### B. The Feedback System (Encoder) * **Optical/Magnetic Encoder:** Provides continuous feedback to the drive. * **Correction:** If the motor is forced out of position by an external load, the electronics immediately compensate to return it to the commanded position. #### C. The Motor Power Stage * **H-Bridge Inverter:** Uses MOSFETs/IGBTs to switch current into the motor phases. * **Low Heating:** The drive uses variable current control, meaning it only sends the current required for the specific load, reducing heat generation compared to standard steppers. --- ### 3. Wiring and Pinout Overview The M2RS series typically utilizes several connectors for power and logic: 1. **Power Port:** VDC and GND (typically 24V or 48V). 2. **Communication Port:** RS485 (A/B) for Modbus control. 3. **I/O Signals:** * **Digital Inputs:** For Origin/Home switches or Limit switches. * **Digital Outputs:** For "Fault" or "In-Position" signals. --- ### 4. Comparison: Open-Loop vs. M2RS-5E-R2 | Feature | Standard Stepper | M2RS-5E-R2 (Step-Servo) | | :--- | :--- | :--- | | **Position Loss** | Possible (No feedback) | Impossible (Closed-loop) | | **Heat Generation** | High (Constant current) | Low (Current matches load) | | **Noise/Vibration** | High | Very Low (Smooth motion) | | **Wiring** | Complex (Motor to Drive) | Simple (Integrated) |