The **M2UDS-C3-R/CE** is a high-precision digital multi-metering transducer manufactured by **M-System (now MG CO., LTD.)**. It is designed to measure various electrical parameters in a power system and convert them into isolated DC output signals or digital communication data. --- ### ## Technical Specifications Overview The model code identifies specific electronic characteristics of the unit: | Feature | Specification | Description | | :--- | :--- | :--- | | **Model** | M2UDS | Multi-metering Transducer (Unit type) | | **Configuration** | C3 | 3-phase, 3-wire system | | **Power Input** | R | 24V DC auxiliary power | | **Standards** | CE | Conformity with European Safety Standards | | **Mounting** | DIN Rail | Standard 35mm rail mounting | --- ### ## Core Electronic Components & Functions #### 1. Input Processing Block * **Voltage Inputs:** Designed to interface with Potential Transformers (PT) or direct AC lines. * **Current Inputs:** Designed for Current Transformers (CT). The device samples the analog sine waves and converts them into digital data using internal **A/D Converters**. * **Measurement Parameters:** It calculates True RMS values for Voltage, Current, Active Power, Reactive Power, Apparent Power, Power Factor, and Frequency. #### 2. Isolation & Safety * **Galvanic Isolation:** The unit features high-level isolation between the input, output, and power supply. This protects downstream electronic equipment (like PLCs) from high-voltage surges or electrical noise. * **Dielectric Strength:** Typically rated for 2000V AC for 1 minute. #### 3. Output Interface * **Analog Outputs:** Provides proportional DC signals (e.g., 4–20mA or 1–5V) corresponding to the measured power values. * **Digital Communication:** Usually equipped with **Modbus RTU (RS-485)**, allowing it to be integrated into SCADA systems or Building Management Systems (BMS). #### 4. Power Supply Section (Suffix -R) * **Input Voltage:** 24V DC. * **Protection:** Includes reverse polarity protection and internal filtering to handle ripple in the DC supply. --- ### ## Application Context This device is commonly used in **Energy Management Systems (EMS)**. Its electronic circuitry is optimized for high accuracy (typically 0.5% for most parameters) and long-term stability in industrial environments. ---