The **M2VF-C0-R/Q** is a high-performance **V/f Converter (Voltage-to-Frequency Converter)** from the M2 Series by M-System (now MG CO., LTD.). This device is an industrial-grade signal conditioner designed to convert a DC voltage input into a proportional pulse frequency output. --- ### 1. Key Technical Specifications The model suffix codes (C0, R, Q) define the specific electronic characteristics of the unit: | Component | Specification | Description | | :--- | :--- | :--- | | **Input (C0)** | 0 – 10V DC | Standard high-level voltage input range. | | **Power (R)** | 24V DC | Requires a regulated 24V DC power source. | | **Output** | Pulse/Frequency | Open collector or contact closure (factory set). | | **Mounting** | Plug-in | Designed for standard 11-pin socket mounting. | | **Option (Q)** | Special Options | Indicates specialized coating or custom specifications. | --- ### 2. Internal Electronic Architecture The M2VF functions through several internal stages to ensure signal integrity and accuracy: #### A. Signal Input Stage The 0–10V DC input passes through a high-impedance buffer to prevent loading the source circuit. It often includes a **low-pass filter** to eliminate high-frequency noise from industrial environments. #### B. Integration & Conversion (V/f Core) This is the "brain" of the device. It utilizes an **integrating operational amplifier** circuit. As the input voltage increases, the integration rate increases, causing a comparator to trigger pulses at a higher rate. This ensures a linear relationship between voltage and frequency. #### C. Isolation Barrier To protect sensitive control systems (like PLCs) from field-side surges, the M2VF features **3-way isolation**: * **Input to Output** * **Input to Power** * **Output to Power** #### D. Output Driver The output is typically an **Open Collector (NPN)**. This acts like a high-speed electronic switch that can interface with the digital counters of a PLC or a totalizer. --- ### 3. Common Applications * **Totalizing Flow:** Converting a 0-10V flow rate signal into pulses for a pulse-count totalizer. * **Motor Speed Monitoring:** Interfacing analog sensors with digital tachometers. * **Remote Transmission:** Converting analog signals to frequency to reduce signal degradation over long distances. --- ### 4. Wiring Diagram (Simplified) | Pin No. | Function | | :--- | :--- | | **1 & 11** | Power Supply (24V DC) | | **5 (+)& 6 (-)** | Input Signal (0-10V DC) | | **9 (+)& 10 (-)** | Pulse Output |