The **W2VS-111-R2** is a high-performance **Signal Conditioner (Transmitter)** belonging to the W2-Series manufactured by M-System. It is specifically a **Potentiometer Transmitter**, designed to convert a potentiometer resistance change into a standard linear DC output signal. --- ### 1. Core Technical Specifications The "111-R2" suffix in the model name defines its specific electronic configuration: | Component | Specification | | :--- | :--- | | **Input** | Potentiometer (100 $\Omega$ to 10 k$\Omega$) | | **Output 1** | 4 – 20 mA DC (Load resistance $\leq$ 750 $\Omega$) | | **Output 2** | 1 – 5 V DC (Load resistance $\geq$ 2500 $\Omega$) | | **Power Input** | 24V DC (Operational range 24V $\pm$ 10%) | | **Isolation** | 3-way (Input to Output to Power) | --- ### 2. Key Electronic Components & Features #### A. Dual Output Functionality Unlike standard transmitters, the "W2" series provides **dual independent outputs**. This allows you to send the signal to two different devices (e.g., a local display and a remote PLC) simultaneously without signal interference. #### B. 3-Way Isolation The internal circuitry provides galvanic isolation between: 1. **The Input Circuit** (Potentiometer) 2. **The Output Circuit** (Current/Voltage loops) 3. **The Power Supply** *This prevents ground loops and protects sensitive control equipment from electrical surges.* #### C. Signal Conditioning Circuitry * **Excitation Voltage:** The device applies a regulated voltage to the potentiometer. * **Linearization:** It ensures that the mechanical rotation of the potentiometer corresponds linearly to the DC output. * **Adjustments:** The front panel typically features **Zero** and **Span** adjustments (trimmer potentiometers) to calibrate the 0% and 100% points. --- ### 3. Wiring Diagram (Logic) The unit typically uses a socket-mounted base for easy installation. ```text [ Potentiometer ] [ W2VS-111-R2 ] [ Receivers ] (Terminal) (Conditioning) (Control) CW <----------------> Input High Wiper <----------------> Input Signal ------> Output 1 (4-20mA) CCW <----------------> Input Low ------> Output 2 (1-5V) ^ | [ 24V DC Power ] ``` --- ### 4. Application Use Case This part is commonly used in industrial automation for **Position Sensing**. * **Example:** A valve actuator uses a potentiometer to indicate how open it is. The W2VS-111-R2 converts that resistance value into a 4-20mA signal that a PLC can read to determine the valve's exact percentage of travel. ---