The **W2VS-A11A-R2/K** is a high-precision, slim-type signal conditioner (isolator) manufactured by **M-System** (now often branded under M-System or MG CO., LTD). It is primarily used in industrial automation to convert, isolate, and transmit DC signals. --- ## 1. Technical Specifications Overview | Feature | Specification | | :--- | :--- | | **Model Type** | Ultra-slim Signal Conditioner (W2VS Series) | | **Input Signal** | 4 – 20 mA DC | | **Output 1** | 4 – 20 mA DC | | **Output 2** | 4 – 20 mA DC | | **Power Input** | 24V DC | | **Isolation** | 3-way (Input to Output to Power) | | **Mounting** | DIN Rail | --- ## 2. Component Analysis (Part Number Breakdown) The alphanumeric code provides specific details about the electronic configuration of the unit: * **W2VS**: Series identifier (Ultra-slim, two-wire/four-wire signal conditioners). * **-A**: Input signal type (4 – 20 mA DC). * **1**: Output 1 signal type (4 – 20 mA DC). * **1**: Output 2 signal type (4 – 20 mA DC). * **-R**: Power input (24V DC). * **2**: Number of outputs (Dual output model). * **SLASHK (/K)**: Special option code, typically indicating a specific conformality coating or a custom calibration requirement. --- ## 3. Core Electronic Functions ### A. Signal Isolation The device utilizes internal optoisolators or magnetic coupling to separate the input, output, and power circuits. This prevents **ground loops** and protects sensitive PLC/DCS inputs from high-voltage surges in the field. ### B. Signal Splitting The "2" in the part number indicates this is a **Signal Splitter**. It takes a single 4-20mA loop input and creates two independent, isolated 4-20mA loops. This allows one signal to go to a local display while the other goes to a control system without interference. ### C. Precision Resistors and Op-Amps Internally, the device uses high-tolerance precision resistors to convert current to voltage for processing, and high-stability operational amplifiers (Op-Amps) to ensure the output remains linear relative to the input. --- ## 4. Wiring and Terminals The unit typically features a front-facing terminal block. Below is the standard electronic pinout logic for the W2VS series: ```text Terminal | Function ---------|------------------ 1 - 2 | Output 1 (+) (-) 3 - 4 | Output 2 (+) (-) 5 - 6 | Input (+) (-) 7 - 8 | Power Supply (24V DC) ``` ---