The **W2AC-AA1A-R/N** is a specific model within the **W2 Series** of Signal Conditioners (Transducers) manufactured by **M-System**. These devices are used in industrial automation to convert AC voltage signals into standard DC signals. --- ### 1. Part Number Breakdown To understand the electronic capabilities, we must decode the model suffix: | Code Segment | Description | Specific Detail | | :--- | :--- | :--- | | **W2AC** | **Series Name** | Dual-Output AC Voltage Transmitter | | **AA** | **Input/Output 1** | Input: 0–110V AC / Output 1: 4–20mA DC | | **1** | **Output 2** | Output 2: 0–10V DC | | **A** | **Power Input** | 100V – 240V AC | | **R/N** | **Options** | R: Standard / N: No special options (UL/CE varies) | --- ### 2. Key Technical Specifications This device acts as an isolator and converter. Below are the core electronic parameters: #### Input Specifications - **Input Signal:** 0 to 110V AC (Frequency 50/60 Hz). - **Input Impedance:** Approx. 1M $\Omega$ minimum. - **Overload Capacity:** 120% continuous. #### Output Specifications - **Output 1:** 4 – 20 mA DC (Load resistance max 750 $\Omega$). - **Output 2:** 0 – 10 V DC (Load resistance min 10 k$\Omega$). - **Response Time:** $\leq$ 0.5 seconds (0 – 90%). #### General Characteristics - **Accuracy:** $\pm$0.3% of span. - **Isolation:** 4-way isolation (Input to Output 1 to Output 2 to Power). - **Dielectric Strength:** 2000V AC @ 1 minute. - **Mounting:** DIN Rail. --- ### 3. Electronic Architecture The W2AC series typically utilizes the following internal components/logic: 1. **Input Transformer:** For high-voltage AC step-down and initial galvanic isolation. 2. **Rectifier & Filter:** Converts the AC input waveform into a proportional DC voltage. 3. **Operational Amplifiers (Op-Amps):** Used for precision scaling and zero/span adjustments (accessible via the front panel). 4. **Isolation Barrier:** Uses optoisolators or magnetic coupling to separate the input, dual outputs, and power supply. 5. **Output Drivers:** Current source circuitry for the 4-20mA loop and voltage regulators for the 0-10V signal. --- ### 4. Connection Diagram (Simplified) Below is a typical pin-out representation for this series: ```text Terminal | Function ---------|-------------------- 1 - 2 | Input (0-110V AC) 3 - 4 | Output 1 (4-20mA) 5 - 6 | Output 2 (0-10V) 7 - 8 | Power Supply (AC) ``` ---