## M-System W2VS-2BY-R2/CE: Electronic Overview The **W2VS-2BY-R2/CE** is a high-performance, ultra-slim (W2 series) signal conditioner manufactured by M-System (now MG CO., LTD). Specifically, it is a **Dual-Output Signal Isolator**. Its primary electronic function is to take one analog input signal and provide two isolated analog output signals. --- ### 1. Model Code Breakdown Understanding the electronic specifications through the model nomenclature: | Code Segment | Specification | Description | | :--- | :--- | :--- | | **W2VS** | Series | Ultra-slim Signal Splitter (Dual Output) | | **2** | Input | 0 – 5V DC | | **B** | Output 1 | 2 – 10V DC | | **Y** | Output 2 | 0 – 10V DC | | **R2** | Power Supply | 24V DC (Operating range 24V ±10%) | | **CE** | Certification | CE marking (EMC Directive compliance) | --- ### 2. Key Electronic Components & Functions #### A. Input Circuitry (Terminal 5 & 6) * **Input Impedance:** For voltage inputs (0-5V), the input resistance is typically $\ge 1 M\Omega$. * **Protection:** Includes surge protectors and filtering to eliminate high-frequency noise from the field sensor. #### B. Isolation Barrier (Galvanic Isolation) This is the core "Electronic Part" of the device. It uses **3-way isolation** (Input to Output 1 to Output 2 to Power). * **Method:** Optical or Magnetic coupling. * **Strength:** 2000V AC @ 1 minute. * **Purpose:** Prevents ground loops and protects the PLC/DCS from high-voltage surges on the field side. #### C. Output Stages (Terminals 1-2 and 3-4) The device features two independent output drivers: * **Output 1 (B):** 2 – 10V DC. Load resistance must be $\ge 2000 \Omega$. * **Output 2 (Y):** 0 – 10V DC. Load resistance must be $\ge 2000 \Omega$. * **Zero/Span Adjustment:** Small potentiometers located on the front allow for fine-tuning the electronic calibration (typically $\pm 5\%$). #### D. Power Supply Module * **Requirement:** 24V DC. * **Current Consumption:** Approx. 50 mA. * **LED Indicator:** A green power LED indicates the internal DC-DC converter is functioning. --- ### 3. Technical Specifications Summary | Feature | Data | | :--- | :--- | | **Accuracy** | $\pm 0.1\%$ of span | | **Temp. Coefficient** | $\pm 0.015\%$ / °C | | **Response Time** | $\le 0.5$ seconds (0 - 90%) | | **Insulation Resistance** | $\ge 100 M\Omega$ with 500V DC | | **Housing Material** | Flame-resistant resin (Black) | --- ### 4. Wiring Diagram (Electronic Interface) ```text [Output 1: 2-10V] <--- (1) (+) (2) (-) [Output 2: 0-10V] <--- (3) (+) (4) (-) [Input: 0-5V] <--- (5) (+) (6) (-) [Power: 24V DC] <--- (7) (+) (8) (-) ``` ---