The **W2RS-0BA-R/Q** is a specific model within the **W2RS Series** of signal conditioners/transmitters, manufactured by **M-System** (now part of MG CO., LTD). This device is a dual-output signal conditioner designed to isolate and convert DC input signals. --- ## 1. Technical Specifications The model code defines the specific hardware configuration and electronic capabilities of the unit. | Feature | Specification | | :--- | :--- | | **Series** | W2RS (Ultra-slim Signal Conditioner) | | **Configuration** | 2-output Signal Conditioner | | **Input Signal (0)** | 4 – 20 mA DC | | **Output 1 (B)** | 2 – 10 V DC | | **Output 2 (A)** | 4 – 20 mA DC | | **Power Supply (R)** | 24V DC | | **Standards (Q)** | CE marking / UL listing (Special standard code) | --- ## 2. Key Electronic Components & Functions ### A. Galvanic Isolation The device features **three-way isolation** (Input to Output 1 to Output 2 to Power). * **Function:** It uses opto-isolators or magnetic transformers to prevent noise propagation and ground loops between the field instruments and the control system (PLC/DCS). ### B. Dual Output Driver Unlike standard conditioners, this model provides two independent outputs: 1. **Current Loop (Output 2):** Uses a high-precision operational amplifier to maintain a constant 4-20mA current regardless of load resistance (up to 550Ω). 2. **Voltage Signal (Output 1):** Provides a 2-10V signal typically used for older analog controllers or specific high-impedance monitoring equipment. ### C. Protection Circuitry * **Surge Protection:** Built-in electronic protection to shield the internal semiconductor components from voltage spikes on the power line. * **Over-current Protection:** Limits the current to prevent damage in case of a short circuit on the output terminals. --- ## 3. Terminal Mapping The electronic interface is managed through specific pin assignments: | Terminal | Function | Description | | :--- | :--- | :--- | | **1 / 2** | Input | Connects to the primary 4-20mA sensor/source. | | **3 / 4** | Output 1 | Voltage output (2-10V DC). | | **5 / 6** | Output 2 | Current output (4-20mA DC). | | **7 / 8** | Power | 24V DC power input. | --- ## 4. Physical Characteristics * **Housing:** Flame-resistant black resin. * **Mounting:** DIN rail mounting for industrial cabinets. * **Adjustments:** Front-facing **Zero** and **Span** potentiometers allow for fine-tuning the analog calibration without removing the unit.