The **M2VF-A1-R2** is a high-performance **Analog Signal Converter** (Transmitter) manufactured by **M-System**. It is primarily used in industrial automation to convert variable frequency signals from sensors into standard analog signals for PLCs or controllers. --- ## 1. Core Technical Specifications The "M2VF" series is characterized by its compact, plug-in design and high isolation capabilities. | Feature | Specification | | :--- | :--- | | **Model Series** | M2VF (Mini-M Series) | | **Input Signal** | Pulse/Frequency (e.g., Dry contact, Open collector, Voltage pulse) | | **Output Signal** | DC Voltage or Current (Configurable) | | **Power Input (R2)** | 110V - 120V AC | | **Accuracy** | ±0.1% | | **Response Time** | Max. 0.5 sec (0 – 90%) | | **Isolation** | 2000V AC (Input to output to power) | --- ## 2. Key Electronic Components & Functions The device operates through several electronic stages to ensure signal integrity: ### A. Pulse Input Stage * **Threshold Detection:** The input circuit detects the frequency of incoming pulses. It can handle various waveforms (Square, Sine, or Triangular) depending on the wiring and internal jumper settings. * **Excitation Supply:** Often provides a small voltage (approx. 12V or 24V) to power the external pulse-generating sensor. ### B. Signal Processing (Frequency-to-Voltage) * **Microprocessor/Logic:** Converts the input frequency count into a digital representation. * **Digital-to-Analog Converter (DAC):** Translates the calculated frequency value into a precise analog voltage level. ### C. Isolation & Output Stage * **Optical Isolation:** Uses opto-couplers to separate the input/output/power circuits. This protects the PLC/DCS from high-voltage spikes or ground loops. * **Output Driver:** An operational amplifier (Op-Amp) circuit ensures the output signal (e.g., 4-20mA or 0-10V) remains stable even with varying load resistance. --- ## 3. Terminal Connection Diagram (General) ```text Terminal | Function --------------------------- 1 | Output (+) 2 | Output (-) 3 | Input (+) 4 | Input (-) 5 | Power AC (L) 6 | Power AC (N) ``` --- ## 4. Part Number Breakdown * **M2VF**: Model Type (Frequency Transmitter). * **A1**: Input Frequency Range (Standard range selection). * **R2**: Power Supply Requirement (110V/120V AC).