The **W2TS-4A3-R2/N** belongs to a series of high-precision, industrial-grade **Temperature Sensors (RTDs)** or **Signal Converters**, typically manufactured by companies like **Watanabe Electric Industry**. Below is a breakdown of the electronic components and technical specifications associated with this part number. --- ### 1. General Specifications The device is designed to convert resistance temperature detector (RTD) signals into standardized analog outputs for industrial PLC systems. | Feature | Specification | | :--- | :--- | | **Model Series** | W2TS (Slim-type Plug-in Terminal Temperature Transmitter) | | **Input Type** | Pt100 $\Omega$ (RTD) | | **Output Type** | DC Voltage or Current (Standardized) | | **Accuracy** | ±0.1% of Full Scale | | **Response Time** | Approx. 25ms (Fast response) | | **Mounting** | DIN Rail Mounting | --- ### 2. Part Number Breakdown The suffix code indicates specific hardware configurations: * **W2TS**: Series name (Transmitter). * **4**: Indicates Output 1 (often 4-20mA DC or 0-10V DC depending on internal calibration). * **A**: Power Supply (Typically AC 85-264V or DC 24V). * **3**: Specific Input/Output range code. * **R2/N**: * **R2**: Indicates the specific relay or response characteristic. * **N**: Often denotes a specific terminal type or lack of a specific option (Non-isolated vs. Isolated nuances). --- ### 3. Key Electronic Characteristics The internal circuitry consists of several critical stages: #### A. Input Bridge Circuit The device uses a **3-wire Wheatstone bridge** configuration to compensate for lead wire resistance. This ensures that the temperature reading is not affected by the length of the cable between the sensor and the transmitter. #### B. Signal Conditioning (Op-Amps) High-precision operational amplifiers are used to: 1. Linearize the non-linear resistance change of the Pt100 element. 2. Amplify the millivolt-level signals to a robust level. #### C. Isolation Barrier Most "R2" models include **Galvanic Isolation** between the input, output, and power supply. This prevents ground loops and protects sensitive PLC equipment from high-voltage surges on the sensor side. #### D. Burnout Protection The electronic design includes a "Burnout" feature. If the RTD wire breaks, the transmitter will force the output to a specific state (Upper limit >20mA or Lower limit <4mA) to alert the control system of a hardware failure. --- ### 4. Connection Diagram (General) ```mermaid graph LR A[RTD Sensor Pt100] --> B(Input Terminals 1, 2, 3) B --> C{Isolation & Amp} D[Power Supply] --> C C --> E(Output Terminals 4-20mA / 0-10V) ``` ---