The **W2VS-2116-R** is a specific model of a **Signal Conditioner / Signal Isolator** (typically part of the W2 series by manufacturers like M-System). These devices are used in industrial automation to convert, isolate, and transmit electrical signals between field sensors and control systems (PLC/DCS). --- ## 1. Technical Specifications Breakdown The alphanumeric code "W2VS-2116-R" describes the specific internal electronic configuration: | Feature | Specification | Description | | :--- | :--- | :--- | | **Model Series** | W2VS | Ultra-slim 2-wire signal conditioner / isolator. | | **Input Signal** | **2** | 4 – 20 mA DC | | **Output 1** | **1** | 4 – 20 mA DC | | **Output 2** | **1** | 4 – 20 mA DC (Dual Output) | | **Power Input** | **6** | 100 – 240V AC | | **Compliance** | **R** | Standard RoHS / CE Compliance | --- ## 2. Key Electronic Components & Functionality The internal circuitry of the W2VS-2116-R is designed to handle three primary tasks: ### A. Galvanic Isolation * **Optoisolators:** The device uses optical coupling to transfer the signal from input to output without a physical electrical connection. * **Purpose:** This prevents "Ground Loops" and protects sensitive PLC inputs from high-voltage surges or noise in the field wiring. ### B. Signal Conversion (Dual Output) * **Operational Amplifiers (Op-Amps):** Precision amplifiers are used to split a single 4-20mA input into two independent 4-20mA outputs. * **Precision Resistors:** Low-tolerance resistors ensure that the 1:1 ratio of input to output remains accurate (typically within ±0.1% span). ### C. Power Supply Section * **AC/DC Rectifier:** Since the "6" code indicates an AC power supply, the unit contains a small internal transformer or switching power supply (SMPS) to convert 100-240V AC down to the internal DC operating voltage (usually 24V DC). --- ## 3. Terminal Configuration The device typically utilizes a plug-in base or DIN-rail mounting system with the following electronic connection points: | Terminal Type | Function | | :--- | :--- | | **Input (+ / -)** | Receives the 4-20mA loop from the field sensor. | | **Output 1 (+ / -)** | Sends the first isolated 4-20mA signal to a controller. | | **Output 2 (+ / -)** | Sends the second isolated 4-20mA signal to a display or recorder. | | **Power (L / N)** | 100-240V AC mains power connection. | --- ## 4. Summary of Use Case If you have a sensor (like a pressure transmitter) and you need to send that data to both a **PLC** and a **Local Chart Recorder** simultaneously without the two devices interfering with each other, the W2VS-2116-R acts as the electronic "bridge" and "shield" between them.