The **M2VF-5FW-R/UL** is a high-performance **Signal Conditioner** (specifically a Frequency-to-Voltage/Current Transmitter) manufactured by **M-System**. It is part of the Mini-M series, designed for converting pulse frequency signals from sensors into standard analog signals. --- ### 1. General Specifications | Feature | Description | | :--- | :--- | | **Model Series** | Mini-M Series (Plug-in base) | | **Primary Function** | Frequency to Analog Conversion | | **Power Input** | 24V DC | | **Output Type** | DC Voltage or Current (Varies by configuration) | | **Safety Certification** | UL/C-UL listed, CE marking | --- ### 2. Breakdown of the Model Number The suffix codes determine the specific electronic characteristics of the unit: * **M2VF**: Model Name (Frequency Transmitter). * **5**: Power Input (24V DC). * **FW**: Input Range (Specifies high-frequency or wide-range pulse input). * **R**: Power Supply Type (Standard DC power). * **UL**: Certification (Underwriters Laboratories approved). --- ### 3. Key Electronic Components & Features The device utilizes several critical electronic sub-systems to ensure precision and isolation: #### A. Input Circuit (Pulse Processing) The input is designed to accept various pulse types including: * Open collector * Mechanical contacts * Voltage pulses (Square or Sine waves) * **Electronic Filter:** Includes a noise filter to prevent false triggering from high-frequency interference. #### B. Isolation Barrier One of the most important electronic features is **Three-way Isolation**: * **Input to Output** * **Input to Power** * **Output to Power** This protects PLC/DCS systems from surges and eliminates ground loops. #### C. Signal Conversion (D/A Conversion) The internal circuitry converts the incoming pulse rate (Hz) into a steady DC level. * **Low-Pass Filter:** Smooths the converted signal to ensure a stable analog output even if the input frequency fluctuates slightly. * **Zero/Span Adjustments:** On-board potentiometers (trimmers) allow for fine-tuning the electronic output levels (e.g., ensuring exactly 4mA at 0Hz). #### D. Physical Form Factor * **Plug-in Structure:** The electronic components are housed in a removable module, while the wiring is fixed to a base socket. This allows for "hot-swapping" or replacing the unit without disturbing the field wiring. --- ### 4. Technical Summary Table | Parameter | Specification | | :--- | :--- | | **Standard Input** | 0 – 100 kHz (depending on range) | | **Response Time** | Max 0.5 seconds (0 - 90%) | | **Insulation Resistance** | 100 MΩ or more (500V DC) | | **Dielectric Strength** | 2000V AC @ 1 minute | | **Operational Temp** | -5 to +55°C (23 to 131°F) | ---