The **M2VT-163-R2/K** is a high-performance **Signal Conditioner** (Isolator/Converter) manufactured by **M-System**. It is part of the M2 series, known for its plug-in base design and high reliability in industrial automation. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Model Type** | Plug-in Signal Conditioner | | **Function** | Converts DC input to two isolated DC outputs | | **Input Signal** | 4 – 20 mA DC (Internal Resistance approx. 250Ω) | | **Output 1** | 1 – 5 V DC (Load resistance ≥ 5000Ω) | | **Output 2** | 4 – 20 mA DC (Load resistance ≤ 600Ω) | | **Power Input** | 24 V DC (Operational range 24V ±10%) | | **Accuracy** | ±0.1% of span | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | --- ### 2. Electronic Components and Internal Structure The internal circuitry is designed for high-precision signal processing and safety. The key electronic sections include: #### A. Input Conditioning Circuit * **Precision Shunt Resistor:** Converts the 4-20mA current loop into a voltage signal. * **Filtering:** Low-pass filters are used to eliminate high-frequency noise from industrial environments. #### B. Isolation Barrier (Galvanic Isolation) * **Transformer/Opto-isolators:** The "K" designation often refers to specific isolation ratings. This unit provides **three-way isolation** (Input to Output to Power). * **Purpose:** Prevents ground loops and protects sensitive PLC/DCS controllers from high-voltage surges on the field side. #### C. Signal Conversion & Amplification * **Operational Amplifiers (Op-Amps):** High-linearity amplifiers ensure that the signal conversion from current to voltage (and the secondary current output) remains proportional to the input. * **Zero/Span Adjustments:** Located on the front panel, these potentiometers allow for fine-tuning the calibration of the electronic output. #### D. Power Management * **DC/DC Converter:** An internal switching regulator converts the 24V DC input into the various internal voltages required for the analog circuitry. --- ### 3. Application Use Case This specific model is typically used when one field sensor (4-20mA) needs to send information to **two different devices** simultaneously, such as: 1. **Output 1 (1-5V):** Sent to a local display or chart recorder. 2. **Output 2 (4-20mA):** Sent to a long-distance PLC or DCS system. ---