The **M2VF-AFW-R/UL** is a high-performance **V/F (Voltage-to-Frequency) Converter** manufactured by **M-System**. It is a plug-in signal conditioner designed to convert a DC voltage input signal into a proportional pulse frequency output. --- ### 1. Key Technical Specifications The device is part of the M2 series, known for its compact design and reliability in industrial automation. | Feature | Specification | |:---|:---| | **Model Type** | V/F Converter (Voltage to Frequency) | | **Input Signal** | Configurable (0–5V DC, 1–5V DC, 0–10V DC, etc.) | | **Output Signal** | Pulse (Open collector, Voltage pulse, or Relay contact) | | **Power Input (R)** | 24V DC | | **Accuracy** | ±0.1% of span | | **Certification (UL)** | UL/cUL recognized component | | **Mounting** | Surface or DIN rail (Plug-in base) | --- ### 2. Functional Description This electronic component performs three primary stages of signal processing: 1. **Input Conditioning:** The DC input voltage is filtered and scaled via a high-precision operational amplifier circuit. 2. **Conversion Logic:** A specialized integrated circuit (IC) converts the analog voltage level into a square wave or pulse train. The frequency of these pulses is directly proportional to the magnitude of the input voltage. 3. **Isolation:** The unit provides **3-way isolation** (Input to Output to Power). This protects sensitive PLCs or controllers from ground loops and electrical noise. --- ### 3. Electronic Architecture & Components Inside the M2VF-AFW-R/UL, the following electronic subsystems are utilized: * **Photo-couplers / Transformers:** Used for galvanic isolation to ensure the input, output, and power circuits do not share a common ground. * **Zero/Span Adjustments:** Accessible via the front panel, these potentiometers allow for fine-tuning the electronic offset and gain. * **Status Indicator:** A green LED on the front indicates the power status and operational health. * **Output Transistor:** For the "Open Collector" output type, a high-speed switching transistor is used to handle the frequency modulation. --- ### 4. Applications The M2VF-AFW-R/UL is typically used in the following electronic systems: * **Totalizing:** Converting a flow rate (voltage) into pulses for a counter to calculate total volume. * **Remote Transmission:** Sending signals over long distances where pulse-frequency is more immune to noise than analog voltage. * **PLC Integration:** Interfacing analog sensors with digital/high-speed counter inputs on a PLC.