The **M2VS-DB-R/N** is a specific model within the **M2VS Series** of ultra-slim signal conditioners (transmitters) manufactured by **M-System** (now MG CO., LTD). This specific unit is a potentiometer transmitter that converts a resistance change from a potentiometer into a standard DC signal. --- ### 1. Technical Specifications Breakdown The suffix code **DB-R/N** defines the internal electronic configuration and power requirements: | Component | Code | Description | | :--- | :--- | :--- | | **Input** | **D** | Potentiometer (Resistance range: 100 $\Omega$ to 10 k$\Omega$) | | **Output** | **B** | 2 – 10 V DC (Load resistance $\geq$ 5000 $\Omega$) | | **Power Input** | **R** | 24 V DC (Operational range: $\pm$10%, ripple 10% p-p max) | | **Option** | **N** | None (Standard configuration without specific special options) | --- ### 2. Key Electronic Features The M2VS series is known for its high-density design and precision. Key electronic characteristics include: * **Isolation Structure:** It features a 3-way isolation system. This electronically separates the **Input**, **Output**, and **Power Supply** circuits to prevent ground loops and protect sensitive equipment from high-voltage surges. * **Potentiometer Excitation:** The device provides a constant voltage to the potentiometer. It measures the wiper position as a ratio, ensuring that changes in total resistance due to temperature fluctuations do not affect the output accuracy. * **Response Time:** Typically $\leq$ 0.5 seconds (0 – 90%). * **Accuracy:** $\pm$0.1% of span. --- ### 3. Connection Diagram (Internal Logic) Below is a representation of how the electronic terminals are mapped: | Terminal No. | Function | Description | | :--- | :--- | :--- | | 1 | Input (CW) | Potentiometer High end | | 2 | Input (Wiper) | Potentiometer Sliding contact | | 3 | Input (CCW) | Potentiometer Low end | | 4 | Output (+) | 2 – 10 V DC Positive | | 5 | Output (-) | 2 – 10 V DC Negative | | 6 | Power (+) | 24 V DC Positive | | 7 | Power (-) | 24 V DC Negative | --- ### 4. Adjustments and Calibration The front of the unit typically houses two electronic trimming potentiometers (multi-turn) for fine-tuning the signal: 1. **Zero Adjustment:** Used to set the 2V output when the input potentiometer is at 0%. 2. **Span Adjustment:** Used to set the 10V output when the input potentiometer is at 100%. ---