The **W2VS-1BY-R2** is a high-performance **Signal Conditioner (Isolator)** manufactured by **M-System**. It is designed to convert and isolate DC input signals into two independent DC output signals. --- ### 1. General Specifications This device is part of the W2 Series, which focuses on dual-output signal conditioning in a compact, plug-in style. | Feature | Specification | |:---|:---| | **Model Type** | Ultra-slim Signal Conditioner (Dual Output) | | **Power Input** | 24V DC (typical for -R2 suffix) | | **Input Signal** | 4 to 20 mA DC | | **Output 1** | 4 to 20 mA DC | | **Output 2** | 1 to 5 V DC | | **Isolation** | 3-way isolation (Input to Output 1 to Output 2 to Power) | | **Mounting** | DIN rail or Surface mount | --- ### 2. Core Electronic Components & Architecture While the internal circuitry is proprietary, the W2VS series relies on several key electronic stages: #### A. Input Stage * **Precision Shunt Resistor:** Converts current inputs (like 4-20mA) into a voltage signal. * **Surge Absorbers:** Protects the internal electronics from transient voltage spikes on the input line. #### B. Isolation Barrier * **Optoisolators / Transformer Coupling:** The "1BY" logic uses high-frequency switching and magnetic or optical coupling to ensure there is no electrical path between the field sensor and the PLC/DCS. * **Dielectric Strength:** Usually rated for 2000V AC for 1 minute. #### C. Signal Processing (Conversion) * **Operational Amplifiers (Op-Amps):** High-precision amplifiers handle the linear scaling of the signal to ensure the output remains proportional to the input (Linearity $\pm 0.1\%$). * **Zero/Span Adjustments:** Potentiometers located on the front panel allow for fine-tuning the electronic calibration. #### D. Output Stage * **Independent Drivers:** Two separate circuits drive Output 1 and Output 2. This ensures that a short circuit or failure on Output 2 does not affect the signal integrity of Output 1. --- ### 3. Suffix Breakdown ("1BY-R2") * **1:** Input code (typically 4-20mA DC). * **B:** Output 1 code (typically 4-20mA DC). * **Y:** Output 2 code (typically 1-5V DC). * **R2:** Power source code (24V DC). ### 4. Application Use Case In industrial electronics, this part is used when a single sensor (like a pressure transmitter) needs to send information to two different places—for example, a **Local Digital Display** and a **Remote PLC**—while keeping them electrically isolated to prevent ground loops.