The **W2TS-2AC-R2/N** is a high-precision, transducer-type signal conditioner manufactured by **M-System** (now part of MG CO., LTD.). This specific model is a **Two-wire Transmitter** designed to convert various input signals into a standard 4-20mA DC output. --- ### 1. Model Breakdown (Nomenclature) Understanding the electronic capabilities of this part requires breaking down the product code: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **W2TS** | Model Series | Two-wire Signal Conditioner (Transmitter) | | **2AC** | Input Type | AC Voltage/Current Input (Average Sensing) | | **R2** | Output Type | 4 – 20 mA DC | | **N** | Option | None (Standard configuration) | --- ### 2. Key Electronic Specifications The internal electronics are designed for industrial durability and signal integrity. * **Measurement Method:** Average sensing, RMS calibrated. * **Input Impedance:** * Current input: Approx. 50 Ω (for 1A range). * Voltage input: Approx. 1 MΩ (for 150V range). * **Output Signal:** 4 – 20 mA DC (Linear to the input). * **Power Requirement:** 12 – 45 V DC (Loop powered). * **Accuracy:** ±0.3% of span. * **Response Time:** ≤ 0.5 seconds (0 to 90%). --- ### 3. Electronic Architecture and Components The device consists of three primary stages: #### A. Input Conditioning Stage The AC input signal is passed through a transformer or a shunt resistor to scale the voltage/current down to electronic levels. This stage provides **galvanic isolation** between the high-voltage AC source and the low-voltage DC loop. #### B. Conversion Stage The AC signal is rectified and filtered. Because this is an "Average Sensing" model, it uses a precision rectifier circuit to find the average value of the AC waveform, which is then calibrated to represent the Root Mean Square (RMS) value for a pure sine wave. #### C. Loop-Powered Output Stage The device regulates the current flow from the external power supply (typically 24V DC). It acts as a variable resistor, modulating the current between 4mA and 20mA based on the processed input signal. --- ### 4. Connection Diagram (Standard Two-Wire) The W2TS-2AC-R2/N is connected in series with the power supply and the load (e.g., a PLC input). ```mermaid graph LR A[AC Source] --> B[W2TS-2AC] B --> C[DC Power Supply +] C --> D[Load/PLC Input] D --> B ``` --- ### 5. Installation and Safety * **Mounting:** Designed for M3.5 screw terminal connection, often DIN rail or wall-mounted. * **Isolation:** Usually provides 2000V AC isolation between input and output. * **Environment:** Operating temperature range is typically -5°C to +55°C. ---