The **M2VF2-01-R2/UL** is a high-precision, plug-in type **Signal Conditioner (V-Unit series)** manufactured by **M-System**. It is specifically designed to convert a variable frequency input signal into a standard DC output signal (Voltage or Current). --- ### 1. Key Technical Specifications | Feature | Specification | |:---|:---| | **Model Category** | Frequency Transmitter (V-Unit Series) | | **Input Signal** | Dry contact, open collector, voltage pulse (Frequency range: 0–10 Hz to 0–10 kHz) | | **Output Signal** | 4–20 mA DC, 0–10V DC, etc. (Specified at time of order) | | **Power Input** | 24V DC or 100–240V AC (depending on suffix) | | **Accuracy** | ±0.1% of span | | **Response Time** | Max. 0.5 sec (0–90%) | | **Isolation** | 3-way isolation (Input to Output to Power) | --- ### 2. Internal Electronic Architecture The device consists of several critical stages to ensure signal integrity and isolation: 1. **Input Conditioning Stage:** Includes a "Noise Filter" and "Pulse Shaper." It converts irregular pulses or sine waves into clean square waves for processing. 2. **Frequency-to-Voltage (F/V) Converter:** The core electronic component that counts the incoming pulse rate and generates a proportional analog voltage. 3. **Isolation Barrier:** Uses photocouplers or transformers to provide **2000V AC isolation**. This protects the control system (PLC/DCS) from field surges or ground loops. 4. **Output Driver:** An operational amplifier stage that scales the signal to the final requested range (e.g., 4–20 mA). It includes Zero and Span adjustments accessible on the front panel. --- ### 3. Suffix Meaning (M2VF2-01-R2/UL) * **M2VF2**: Model number (Frequency Transmitter). * **0**: Standard type. * **1**: Output 1 (e.g., 4–20 mA DC). * **R**: Power Input (24V DC). * **2**: Output 2 (If applicable, or specific configuration). * **UL**: Underwriters Laboratories certification (Compliance with US/Canadian safety standards). --- ### 4. Application Diagram ```mermaid graph LR A[Frequency Source/Sensor] --> B[M2VF2 Input] B --> C{Isolation Layer} C --> D[M2VF2 Output] D --> E[PLC / Controller] ``` ---