The **M2PHS2H-151-R/Q** is a high-precision, industrial-grade **Current Transducer** (specifically a Hall Effect current sensor) manufactured by **M-System** (now part of MG CO., LTD). It is designed to measure AC current and convert it into a proportional standard DC signal (such as 4-20mA or 0-10V). ### 1. Key Technical Specifications | Parameter | Specification Details | | :--- | :--- | | **Model Series** | M2PHS (Plug-in Current Transducer) | | **Input Signal** | 0 – 1 A AC or 0 – 5 A AC (Standard range) | | **Output Signal** | Configurable (e.g., 4-20mA DC, 1-5V DC, etc.) | | **Accuracy** | ±0.3% of span | | **Response Time** | ≤ 0.5 seconds (0 to 90%) | | **Isolation** | 2000V AC @ 1 minute (Input to output to power to ground) | | **Mounting** | Surface or DIN rail mounting (Plug-in base) | --- ### 2. Breakdown of the Model Suffix (151-R/Q) Based on M-System's nomenclature, here is the breakdown of the electronic configuration: * **M2PHS**: The base model for an AC Current Transducer (Average sensing). * **2H**: Represents the physical housing/connection type (usually a 2-wire or specific plug-in base configuration). * **1**: Specifies the Input (typically 0–1A AC). * **5**: Specifies the Output (typically 4–20mA DC). * **1**: Specifies the Power Input (typically 100V AC). * **-R**: Indicates the Power Supply voltage (R usually denotes **24V DC**). * **/Q**: Indicates a **Special Option** code. This usually means the unit has specific custom calibrations or conformal coating for harsh environments. --- ### 3. Electronic Components and Working Principle The internal circuitry of this part consists of four main stages: 1. **Input Transformer/Shunt:** The AC input is isolated via an internal transformer to step down the current to a level safe for the internal electronics. 2. **Rectifier & Filter Circuit:** Since the "PHS" series uses **Average Sensing**, the AC waveform is rectified into DC and filtered. It is calibrated to represent the RMS value of a pure sine wave. 3. **Isolation Barrier:** Uses an opto-isolator or transformer-based isolation to ensure that high voltage on the input side does not damage the PLC or controller on the output side. 4. **Signal Conditioner/Amplifier:** An operational amplifier (Op-Amp) circuit scales the signal to the desired output range (e.g., 4-20mA). --- ### 4. Application Usage * **Power Monitoring:** Measuring the current draw of electric motors to detect overloads. * **PLC Interfacing:** Converting high-voltage AC lines into low-voltage DC signals for data acquisition. * **Energy Management:** Monitoring building or factory power consumption.