The **W2SP-2D4-R2/N** belongs to the **W2SP series**, which are high-performance, compact, and programmable temperature controllers/signal transducers, typically manufactured by companies like **M-System** (now MG CO., LTD.). --- ### 1. Part Number Breakdown The alphanumeric code identifies the specific electrical characteristics and configuration of the unit: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | **W2SP** | Programmable Temperature Transmitter (Ultra-slim, plug-in style) | | **Output 1** | **2** | 0 – 20 mA DC (Configurable) | | **Output 2** | **D** | 0 – 10 V DC (Configurable) | | **Power Input** | **4** | 100 – 240 V AC | | **Options** | **R2** | Dual output (Independent configuration) | | **Standard** | **N** | Standard model (No specific special options) | --- ### 2. Key Electronic Specifications This device acts as a bridge between industrial sensors and control systems (PLC/DCS). * **Input Types:** Multi-input capability. It can accept signals from: * **Thermocouples:** K, E, J, T, B, R, S, C, N, U, L, P. * **RTDs:** Pt 100, JPt 100, Pt 50, Ni 508.4. * **DC Voltage/Current:** mV and Volts. * **Dual Output (R2):** It provides two isolated outputs. This allows one signal to go to a local display while the second goes to a PLC. * **Isolation:** 2000V AC isolation between Input – Output 1 – Output 2 – Power – Ground. * **Accuracy:** Typically ±0.1% of span (depends on the sensor type). * **Response Time:** $\leq$ 0.5 seconds (0 to 90%). --- ### 3. Internal Components and Circuitry The W2SP series uses high-precision electronic architecture to ensure signal integrity: 1. **A/D Converter:** Converts the analog sensor voltage into a digital signal for processing. 2. **Microprocessor ($\mu$P):** Handles linearization (correcting the non-linear curve of thermocouples) and cold-junction compensation. 3. **Isolation Transformer:** Uses high-frequency switching to provide galvanic isolation, preventing ground loops. 4. **D/A Converter & Driver:** Converts the processed digital value back into a precise 4-20mA or 0-10V analog signal. --- ### 4. Wiring Diagram Representation The unit typically features a plug-in base for easy maintenance. ```text [ Terminal Layout ] 1 - 2 : Power Input (100-240V AC) 3 : Ground 4 - 5 : Output 1 (+) (-) 6 - 7 : Output 2 (+) (-) 8 - 10: Input Terminals (Sensor Connection) ``` ---