The **W2RS-4AA-R2** is a specific model within the **W2RS series** of ultra-slim, signal conditioners/transducers manufactured by **M-System**. It is primarily used in industrial automation for signal isolation and conversion. --- ### 1. Technical Specifications The part number `W2RS-4AA-R2` can be broken down into its functional components: | Component | Code | Description | | :--- | :--- | :--- | | **Model** | W2RS | Dual-output Signal Conditioner (Ultra-slim) | | **Input** | 4 | 4 to 20 mA DC | | **Output 1** | A | 4 to 20 mA DC | | **Output 2** | A | 4 to 20 mA DC | | **Power Supply** | R2 | 11/27 V DC (Ripple 10% p-p max) | --- ### 2. Key Electronic Features The device serves as a **Loop Isolator/Splitter**. Its primary purpose is to take one current loop input and provide two independent, isolated current loop outputs. #### A. Isolation Architecture The "R2" variant utilizes a sophisticated 4-way isolation scheme. This ensures that electrical noise or surges do not pass between circuits: * **Input to Output 1** * **Input to Output 2** * **Output 1 to Output 2** * **Input/Outputs to Power Supply** #### B. Signal Conversion * **Input Impedance:** Typically around $250 \Omega$ for the 4-20mA input. * **Load Resistance:** Output 1 and Output 2 can usually drive up to $550 \Omega$ each. * **Accuracy:** Generally $\pm 0.1\%$ of span, providing high-precision data transmission. #### C. Physical Design * **Construction:** Slim-line housing (approx. 12.5mm wide) designed for DIN rail mounting. * **Termination:** Tension clamp or screw terminals (depending on the specific base). * **Status Indicator:** Equipped with a front-facing Power LED to indicate the health of the 24V DC supply. --- ### 3. Application Use-Case The W2RS-4AA-R2 is commonly used when a single sensor (like a pressure transmitter) needs to send a signal to two different devices simultaneously (e.g., a **PLC** and a **Local Display Chart Recorder**) without the risk of a ground loop or one device's failure affecting the other. --- ### 4. Circuit Connection Block Diagram ```mermaid graph LR Input[4-20mA Source] --> Device(W2RS-4AA-R2) Power[24V DC Power] --> Device Device --> Out1[Output 1: 4-20mA] Device --> Out2[Output 2: 4-20mA] ```