The **M2UDS-J5W-R2/N** is a specific model of a **Miniature Multi-Transducer** (Universal Input Power Transducer) manufactured by **M-System**. It is designed to convert various electrical parameters from a power line into standardized DC signals for PLC or SCADA monitoring. --- ### ## Technical Specifications Breakdown The model number suffix encodes specific hardware configurations: | Part Segment | Meaning | Specification Details | | :--- | :--- | :--- | | **M2UDS** | Series Name | Universal Input Power Transducer (Mini-M Series) | | **J5** | Input Type | 3-phase, 3-wire system | | **W** | Measured Variable | Active Power (Wattage) | | **R2** | Power Supply | 24V DC | | **N** | Output Signal | No specific option / Standard configuration | --- ### ### Key Electronic Components & Functions 1. **Input Conditioning Circuitry**: * **Voltage Transformers (PTs)**: Internal isolation transformers step down high-line voltage (up to 480V depending on settings) to low-voltage signals suitable for the internal ADCs. * **Current Transformers (CTs)**: Specialized shunt or sensing circuits handle the 1A or 5A input from external CTs. 2. **Processing Core**: * **True RMS DSP**: The unit uses a Digital Signal Processor to calculate true power, accounting for harmonic distortion in the waveform. * **Multiplication Logic**: It calculates $P = \sqrt{3} \times V \times I \times \cos(\phi)$ for 3-phase systems. 3. **Isolation Barrier**: * **Three-way Isolation**: Provides 2000V AC isolation between Input, Output, and Power supply. This protects sensitive PLC equipment from high-voltage surges on the power lines. 4. **Output Driver**: * **D/A Converter**: Converts digital power calculations back into an analog current or voltage signal (typically 4-20mA or 1-5V DC). --- ### ### Connection Diagram Interface | Terminal No. | Function | Description | | :--- | :--- | :--- | | **1 - 2** | Power Supply | 24V DC (+ / -) | | **3 - 4** | Output | DC Analog Output | | **5 - 8** | Voltage Input | Line Voltage (P1, P2, P3) | | **9 - 12** | Current Input | Line Current (1S, 1L, 3S, 3L) | --- ### ### Safety and Performance Features * **Response Time**: Approximately 0.5 seconds (0 to 90%). * **Accuracy**: $\pm0.5\%$ of span. * **Housing**: Flame-resistant black resin (UL94V-0). * **Mounting**: Standard DIN rail or surface mounting.