The **M2VF2-B4W-R2/CE** is a high-performance, compact signal transducer (isolator) manufactured by **M-System**. It is designed to convert a variable frequency pulse signal into a standard DC output signal (Voltage or Current). --- ### 1. Key Technical Specifications | Feature | Specification | |:---|:---| | **Model Series** | M2V Series (Mini-M) | | **Input Type** | Variable Frequency (Dry contact, Open collector, or Voltage pulse) | | **Output Type** | DC Voltage or Current (Factory specified) | | **Power Input (R2)** | 11–27V DC | | **Response Time** | Max. 2 seconds (0–100%) | | **Accuracy** | ±0.1% of span | | **Isolation** | Input to output to power (2000V AC) | | **Certifications** | CE Marking | --- ### 2. Breakdown of the Model Number (Coding) Understanding the alphanumeric suffix is critical for identifying the specific electronic capabilities of this unit: * **M2VF2**: Frequency Transmitter (converts Hz to DC). * **B**: Input code. Typically handles Open Collector or Mechanical Contact. * **4W**: Output code. Generally indicates a 4-20mA DC or specific high-load voltage output (refer to manual for specific voltage range). * **R2**: Power Input. Indicates 11–27V DC. * **CE**: European Conformity (Electromagnetic Compatibility and Safety). --- ### 3. Electronic Functional Blocks The internal circuitry of the M2VF2-B4W-R2/CE consists of four primary stages: 1. **Input Conditioning:** Filters the incoming frequency signal to remove noise and bounces (especially for mechanical contacts). 2. **Frequency-to-Voltage Converter (F/V):** The core microprocessor or analog circuit that calculates the frequency based on pulse intervals and converts it to a proportional internal voltage. 3. **Galvanic Isolation:** Uses an optical or magnetic isolator to separate the input, output, and power circuits. This prevents ground loops and protects sensitive PLC/DCS equipment from high-voltage surges. 4. **Output Driver:** Scales the internal signal to the final DC output (e.g., 4-20mA) and ensures it can drive the connected load resistance. --- ### 4. Connection Diagram (Simplified) ```text [ Field Device ] [ M2VF2 ] [ Controller/PLC ] (Flow Meter) ----Pulse----> [Input] ---DC---> (Analog Input Card) [Power] | (24V DC Source) ``` --- ### 5. Common Applications * **Flow Measurement:** Converting pulses from a turbine flow meter into a 4-20mA signal for a PLC. * **Motor Speed Monitoring:** Translating pulses from a proximity switch or encoder on a rotating shaft into a tachometer display signal. * **System Integration:** Providing signal isolation in environments with high electrical noise.