The **M2VT-BA-R/N** is a specific model within the M2VT series of **V-Network Transmitter (Isolator)** units manufactured by **M-System** (now MG CO., LTD). These devices are high-performance signal conditioners designed for industrial automation. --- ### 1. Technical Specifications Overview The model code "BA-R/N" breaks down into specific electronic characteristics: | Code Segment | Description | Specific Detail | | :--- | :--- | :--- | | **M2VT** | Model Series | V-Network Transmitter (Isolator) | | **B** | Input Signal | 2 – 10 V DC | | **A** | Output Signal | 4 – 20 mA DC | | **R** | Power Input | 24 V DC | | **N** | Standards/Options | No special options (Standard) | --- ### 2. Core Electronic Components The internal architecture of the M2VT-BA-R/N consists of several key stages: #### A. Input Stage (Signal Conditioning) * **High Impedance Buffer:** Since the input is a voltage signal (2–10V), the input stage features a high input resistance (typically $\ge 1 M\Omega$) to prevent loading effects on the source sensor. * **Filtering:** Low-pass filters are used to suppress high-frequency noise common in industrial environments. #### B. Isolation Barrier (Galvanic Isolation) * **Three-Way Isolation:** This unit provides 2000V AC isolation between the **Input**, **Output**, and **Power** terminals. * **Technology:** It typically utilizes a high-speed photocoupler or a magnetic transformer to transfer the signal across the isolation gap, preventing ground loops and protecting sensitive PLC inputs from high-voltage surges. #### C. Output Stage (Current Driver) * **V/I Converter:** Converts the isolated voltage signal into a precise 4–20 mA current loop. * **Load Resistance Capability:** Designed to drive loads up to $550 \Omega$ at 24V DC. #### D. Power Supply Unit * **DC/DC Converter:** An internal switching regulator takes the 24V DC input and generates stable, isolated rails for the internal circuitry. --- ### 3. Key Electronic Performance Features * **Accuracy:** Typically $\pm 0.1\%$ of span. * **Response Time:** Approximately $\le 0.5$ seconds (0 – 90%). * **Temperature Coefficient:** $\pm 0.015\% / ^\circ C$, ensuring stability in varying cabinet temperatures. * **Protection:** Includes overcurrent protection and reverse polarity protection on the power input. --- ### 4. Terminal Configuration | Terminal | Function | | :--- | :--- | | **1 - 2** | Output (+) / Output (-) | | **3 - 4** | No Connection | | **5 - 6** | Input (+) / Input (-) | | **7 - 8** | Power (+) / Power (-) |