The **W2SP-1CC-R2/N** is a specific model within the **W2SP Series** of digital panel meters (often referred to as signal conditioners or indicators) manufactured by **M-System** (now part of MG CO., LTD). This device is primarily used in industrial automation to convert analog signals into digital readouts and provide alarm outputs. --- ### 1. Part Number Breakdown Understanding the specific electronic configuration requires decoding the suffix codes: | Code Segment | Description | Details | | :--- | :--- | :--- | | **W2SP** | Series Name | Ultra-slim Signal Conditioner / Digital Indicator | | **1** | Input Type | DC Current (typically 4–20mA or 0–20mA) | | **CC** | Output Type | Dual (2) Isolated DC Current Outputs | | **R2** | Power Supply | 11–27V DC (Standard 24V DC application) | | **N** | Standards/Options | No specific certifications (Standard configuration) | --- ### 2. Key Electronic Features #### A. Dual Isolated Output The "CC" designation indicates that this unit provides two independent, isolated analog current outputs. This is electronically significant because: * **Galvanic Isolation:** It prevents ground loops between the input sensor and the PLC/DCS. * **Signal Splitting:** One input signal can be sent to two different receivers (e.g., a local controller and a remote data logger) without signal degradation. #### B. Display and User Interface * **LED Display:** It features a 4-digit red LED display to show the process value (PV) directly on the DIN rail or panel. * **Front Keys:** Three front buttons allow for on-site scaling (e.g., converting 4-20mA to 0-100.0%) and alarm setting adjustments. #### C. Circuit Protection & Design * **High Density:** The unit is designed for DIN rail mounting with a slim profile (approx. 18mm - 20mm wide) to save cabinet space. * **Dielectric Strength:** Usually rated for 2000V AC @ 1 minute (Input to Output to Power to Ground). --- ### 3. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Impedance** | Approx. 50 $\Omega$ (for 4-20mA input) | | **Output Load Resistance** | Max 600 $\Omega$ per output | | **Response Time** | $\leq$ 0.5 seconds (0 – 90%) | | **Accuracy** | $\pm$0.1% of span | | **Mounting** | DIN Rail | | **Terminal Screws** | M3.5 (Nickel-plated steel) | --- ### 4. Typical Connection Diagram Internally, the electronics follow this signal path: 1. **Input Stage:** Receives the DC current and filters noise. 2. **A/D Conversion:** Converts the analog signal to digital for the microprocessor. 3. **Processing:** Scales the value for the LED display and calculates output levels. 4. **D/A Conversion & Isolation:** Converts digital values back to two independent analog outputs via optocouplers or magnetic transformers. ---