The **W2AC-AC4A-R** is a specific model within the **W2 Series** of Signal Conditioners manufactured by **M-System** (now MG CO., LTD). This device is a **Potentiometer Transmitter** designed to convert a potentiometer's resistance position into a standard DC signal. --- ## Technical Specifications The model number follows a specific nomenclature. Here is the breakdown of the electronic parameters: | Code Segment | Parameter | Description | | :--- | :--- | :--- | | **W2AC** | Model Series | Potentiometer Transmitter (Dual Output) | | **-A** | Input | Total resistance $100\ \Omega$ to $10\ \text{k}\Omega$ | | **-C** | Output 1 | $1$ to $5\text{V DC}$ | | **-4** | Output 2 | $0$ to $10\text{V DC}$ | | **-A** | Power Input | $100$ to $240\text{V AC}$ | | **-R** | Options | Standard (RoHS compliant) | --- ## Key Electronic Features ### 1. Dual Independent Outputs This model is unique because it provides **two isolated DC outputs** from a single potentiometer input. This allows one signal to be sent to a local display or PLC, while the second is sent to a remote SCADA system without interference. ### 2. High Isolation The unit features a "Three-way isolation" system: * **Input to Output** * **Output to Power** * **Output 1 to Output 2** * *Isolation Strength:* Typically 2000V AC @ 1 minute. ### 3. Circuit Protection * **Burnout Protection:** The electronic circuit is designed to drive the output to a specific limit (upscale or downscale) if the potentiometer wire breaks. * **Zero/Span Adjustment:** Located on the front panel, these allow for precise calibration of the $0\%$ and $100\%$ resistance points. --- ## Wiring and Connections The device uses a **base socket** for mounting. Below is the general electronic pin mapping for the W2 series: ```text Input (Potentiometer): - Terminal 1: CW (High) - Terminal 2: Wiper (Signal) - Terminal 3: CCW (Low) Outputs: - Terminal 4 (+): Output 1 - Terminal 5 (-): Output 1 - Terminal 6 (+): Output 2 - Terminal 7 (-): Output 2 Power: - Terminal 10: L (Live) - Terminal 11: N (Neutral) ``` --- ## Usage Precautions * **Resistance Load:** Ensure the input potentiometer resistance stays within the **100 Ω to 10 kΩ** range to maintain linearity. * **Load Resistance:** For the voltage outputs (1-5V and 0-10V), the load resistance must be at least **10 kΩ** to avoid voltage drops.