The **W2VS-15AB-R/N** is a high-performance **Signal Conditioner (Isolator)** manufactured by **Watanabe Electric Industry**. It is specifically designed to convert and isolate DC voltage or current signals in industrial automation systems. --- ### 1. Key Technical Specifications The part number follows a specific nomenclature that defines its electronic characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Model Series** | W2VS | Slim-type Plug-in Signal Conditioner (2rd Gen) | | **Input Signal** | 1 (4-20mA DC) | Standard current loop input | | **Output-1** | 5 (1-5V DC) | High-impedance voltage output | | **Output-2** | A (4-20mA DC) | Second independent current output | | **Power Supply** | B (100-240V AC) | Universal AC Power input | | **Mounting** | R/N | DIN Rail Mount / Socket type | --- ### 2. Core Electronic Functions #### A. Triple Isolation One of the primary electronic functions of this device is **3-way isolation**. It electrically separates: 1. **Input Circuit** 2. **Output Circuit** 3. **Power Supply** This prevents ground loops, protects sensitive PLC/DCS inputs from high-voltage transients, and reduces common-mode noise. #### B. Signal Conversion (Dual Output) The device acts as a signal splitter. It takes one input (e.g., 4-20mA) and provides two isolated outputs simultaneously. This allows one signal to be sent to a local display while the other is sent to a central control system. #### C. Accuracy and Stability * **Accuracy:** Typically ±0.1% of span. * **Temperature Coefficient:** Low drift (approx. ±0.015%/°C), ensuring electronic precision across industrial temperature ranges. * **Response Time:** Fast response (typically <0.5s) to ensure real-time monitoring. --- ### 3. Internal Component Overview While the exact internal schematic is proprietary, the electronic architecture consists of: * **Input Stage:** Precision shunt resistors and surge protection (TVS diodes). * **Isolation Barrier:** High-speed optocouplers or magnetic transformers for galvanic isolation. * **Output Stage:** Operational amplifiers (Op-Amps) and transistors to drive the 4-20mA current loop or 1-5V voltage signal. * **Power Module:** A switching mode power supply (SMPS) to convert AC mains to internal DC rails. --- ### 4. Wiring Diagram (Simplified) The unit typically uses a socket-based connection for easy maintenance: ```text [ Power L ] -- (1) (5) -- [ Output 1 + ] [ Power N ] -- (2) (6) -- [ Output 1 - ] [ Input + ] -- (3) (7) -- [ Output 2 + ] [ Input - ] -- (4) (8) -- [ Output 2 - ] ```