The **M2VT-161-R2** is a high-performance **V/I Converter (Voltage-to-Current Transducer)** manufactured by **M-System**. This electronic component is primarily used in industrial automation to convert a DC voltage input signal into a proportional standard DC current output signal, while providing galvanic isolation. --- ### 1. Key Electronic Specifications | Feature | Specification Details | | :--- | :--- | | **Input Signal** | 0 – 10V DC (High impedance) | | **Output Signal** | 4 – 20mA DC | | **Power Input** | 24V DC (Standard Range: 24V ±10%) | | **Accuracy** | ±0.1% of span | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Isolation** | 3-way isolation (Input to Output to Power) | | **Isolation Strength** | 2000V AC @ 1 minute | --- ### 2. Internal Electronic Components & Construction The device is built using a combination of precision analog circuitry and power management components: * **Input Stage:** Utilizes a high-impedance operational amplifier (Op-Amp) to ensure that the voltage source being measured is not loaded down, maintaining signal integrity. * **Isolation Barrier:** Uses **optical isolators** (optocouplers) or magnetic transformers to separate the input, output, and power circuits. This prevents ground loops and protects sensitive PLC/DCS equipment from high-voltage surges. * **V/I Conversion Circuit:** A precision current-source transistor circuit that translates the 0-10V linear range into a stable 4-20mA loop. * **Zero/Span Adjustments:** Located on the front panel, these are multi-turn potentiometers that allow the user to fine-tune the minimum (4mA) and maximum (20mA) points. --- ### 3. Connection Diagram (Terminal Mapping) The M2VT-161-R2 typically uses a plug-in base (socket) for easy maintenance. | Terminal No. | Function | Description | | :--- | :--- | :--- | | **1** | Output (+) | 4-20mA Positive | | **2** | Output (-) | 4-20mA Negative | | **3** | Input (+) | 0-10V Positive | | **4** | Input (-) | 0-10V Negative | | **7** | Power (U) | +24V DC | | **8** | Power (V) | 0V DC (GND) | --- ### 4. Application Use Case This part is commonly used when a sensor or a controller outputs a **0–10V** signal, but the receiving instrument (like a valve actuator or a remote display) is located far away and requires a **4–20mA** signal to minimize voltage drop over long wire distances.