The **M2VT-B1-R2/K** is a high-performance **Programmable Multi-Function Converter** (Signal Conditioner) manufactured by **M-System**. It is designed to convert various analog input signals into a standardized DC output signal while providing high galvanic isolation. --- ### 1. Technical Specifications Overview The part number breaks down into specific electronic characteristics: | Component | Code | Description | | :--- | :--- | :--- | | **Model** | **M2VT** | Multi-Function Signal Conditioner (Programmable) | | **Input** | **B1** | DC Voltage/Current (Field Configurable) | | **Output** | **R2** | 4 – 20 mA DC (Current Output) | | **Power Supply** | **K** | 85 – 131 V AC | --- ### 2. Key Electronic Components & Features #### A. Signal Isolation The device features **three-way isolation**. This electronically decouples the Input, Output, and Power circuits. * **Isolation Voltage:** Typically tested up to 2000V AC. * **Purpose:** Prevents ground loops, protects sensitive PLC/DCS inputs from high-voltage surges, and reduces electromagnetic interference (EMI). #### B. Microprocessor-Based Design Unlike fixed analog conditioners, the "B1" designation indicates a programmable front-end. * **A/D Converter:** Converts the analog input into a digital signal for processing. * **D/A Converter:** Converts the processed digital value back into the 4-20mA analog output. * **User Configurable:** Using a PC or a dedicated programmer, the gain and zero points can be adjusted electronically. #### C. Power Supply Section The **"K"** variant signifies a specific internal transformer/rectifier circuit designed for North American standard AC voltages (approx. 110V-120V). It includes: * Internal filtering to handle line noise. * Overcurrent protection. --- ### 3. Connection Map | Terminal No. | Function | Description | | :--- | :--- | :--- | | **1 & 2** | Output (+) / (-) | 4-20mA DC Loop | | **3 & 4** | Input (+) / (-) | Variable Voltage/Current Input | | **5 & 6** | Power Supply | 85 – 131 V AC | --- ### 4. Electronic Protection Features * **Burnout Protection:** The electronic logic can be set to drive the output to a specific state (Upscale or Downscale) if the input sensor wire breaks. * **Noise Filter:** Includes a digital filter with a user-definable time constant to stabilize erratic signals. ---