The **M2VF2-B3-R2/CE** is a high-precision, 2-wire universal transmitter (signal conditioner) manufactured by **M-System**. It is designed to convert signals from various sensors into a standard 4-20mA DC output. --- ### 1. Technical Specifications The following table summarizes the key electronic and electrical characteristics of the device: | Feature | Specification | | :--- | :--- | | **Input Type** | Universal (mV, V, T/C, RTD, Potentiometer) | | **Output** | 4 – 20 mA DC (2-wire loop) | | **Power Input** | 12 – 45 V DC (Loop-powered) | | **Accuracy** | ±0.1% of span (depends on input type) | | **Isolation** | Input to Output (1500V AC for 1 minute) | | **Operating Temp** | -5 to +55°C (23 to 131°F) | | **Mounting** | DIN rail mounting | --- ### 2. Breakdown of the Part Number The alphanumeric code indicates specific configuration options for this unit: * **M2VF2**: Series identifier for the 2-wire universal transmitter. * **B3**: Specifically identifies the factory-calibrated input range or configuration (often related to high-impedance or specific voltage inputs). * **R2**: Indicates the power supply requirements or revision version (typically 24V DC loop). * **CE**: Confirms compliance with European safety and electromagnetic compatibility standards (CE Marking). --- ### 3. Functional Electronic Components The internal architecture of the M2VF2-B3-R2 consists of several critical stages: 1. **Input Conditioning Circuit**: A high-impedance stage that accepts millivolts or resistance. It includes cold-junction compensation for thermocouples. 2. **A/D Converter**: Converts the analog sensor signal into a digital value for precise processing. 3. **Microprocessor**: Handles linearization (making the output proportional to temperature rather than raw voltage) and digital filtering. 4. **D/A Converter & Loop Controller**: Regulates the current on the 2-wire loop to represent the measured value between 4mA and 20mA. 5. **Galvanic Isolation**: Uses optoisolators or transformers to separate the input sensor circuit from the output loop, protecting against ground loops and surges. --- ### 4. Wiring Configuration As a 2-wire transmitter, the power and signal share the same pair of wires. ```mermaid [Power Supply (+)] ----> [Transmitter (+)] [Transmitter (-)] ----> [Load/PLC Input] [Load/PLC Input (-)] ----> [Power Supply (-)] ```