The part number **W2SP-2AC-R2/Q** refers to a high-performance **Signal Conditioner** (specifically a Transducer/Potentiometer Transmitter) manufactured by **M-System** (now MG CO., LTD.). This device is part of the W2-UNIT series, which features ultra-slim, plug-in designs with dual isolated outputs. --- ### 1. Key Technical Specifications The "W2SP" series is designed to convert a potentiometer (resistor) input into standard instrumentation signals (e.g., 4–20mA or 0–10V). | Feature | Specification | Description | | :--- | :--- | :--- | | **Input Type** | Potentiometer | 100 $\Omega$ to 10 k$\Omega$ | | **Output 1** | 4 – 20 mA DC | Standard current loop | | **Output 2** | 1 – 5 V DC | Voltage output | | **Power Supply** | 24V DC | Indicated by the "R2" code | | **Accuracy** | ±0.1% | High precision signal processing | | **Isolation** | 3-Way or 4-Way | Input to output 1 to output 2 to power | | **Housing** | Plug-in style | DIN rail or surface mounting | --- ### 2. Part Number Breakdown Understanding the alphanumeric code helps identify the specific electronic configuration: | Segment | Code | Meaning | | :--- | :--- | :--- | | **Series** | **W2SP** | Potentiometer Transmitter (Dual Output) | | **Output 1** | **2** | 4 – 20 mA DC | | **Output 2** | **A** | 4 – 20 mA DC (Standard) or specific voltage | | **Power** | **R2** | 24V DC Ripple 10% p-p max | | **Option** | **/Q** | Special Option (usually customized or specific certs) | --- ### 3. Internal Circuitry and Operation The internal electronics are designed for industrial ruggedness and high-speed response: 1. **Reference Voltage Source:** The unit provides a stable reference voltage to the potentiometer. 2. **Signal Amplifier:** A high-impedance amplifier detects the wiper position without loading the circuit. 3. **Isolation Barrier:** Optical or magnetic isolators ensure that electrical noise on the field side does not reach the PLC/DCS. 4. **Zero/Span Adjustments:** Multiturn potentiometers located on the front panel allow for fine-tuning of the 0% and 100% signal levels. --- ### 4. Wiring Diagram Representation The device typically uses a terminal base. The basic electronic connection logic is as follows: ```text Field Side (Potentiometer) M-System W2SP Control Side (PLC) [ 1 ] <--- High End (CW) --------| |------- [ 9 ] (+) Output 1 [ 2 ] <--- Wiper ----------------| Isolator |------- [ 10] (-) Output 1 [ 3 ] <--- Low End (CCW) --------| & Converter |------- [ 11] (+) Output 2 | |------- [ 12] (-) Output 2 |_______________|------- [ 13] (+) 24V DC [ 14] (-) 0V DC ``` ---