The **M2VF-5FW-R2/N** is a specific model of an **Ultra-Slim Signal Conditioner (V-Unit)** manufactured by **M-System** (now part of MG CO., LTD). It is designed to convert a variable frequency pulse signal into a standard DC output (Voltage or Current). Below is the technical breakdown of its electronic components and specifications. --- ### 1. Model Code Breakdown The model name is a shorthand for its electronic configuration: | Code Segment | Description | Details | | :--- | :--- | :--- | | **M2VF** | Series Name | Ultra-slim V-Unit Frequency Transmitter | | **5** | Input Type | Dry contact or Open collector | | **FW** | Output Type | Wide-range Output (Field-configurable) | | **R2** | Power Input | 100 – 240V AC (Operating range 85 – 264V) | | **N** | Standards | None (Standard version) | --- ### 2. Key Electronic Specifications This device acts as a **Frequency-to-Analog (F/V or F/I) Converter**. #### A. Input Section (Frequency) * **Sensor Type:** Designed for dry contacts (switches) or NPN open collectors. * **Frequency Range:** Configurable, typically used for ranges between 0 – 0.01 Hz up to 0 – 10 kHz. * **Detection Level:** It detects the "On/Off" state of the pulse to calculate frequency. #### B. Output Section (DC Signal) * **Signal Types:** Can be configured for DC current (e.g., 4–20mA) or DC voltage (e.g., 1–5V, 0–10V). * **Isolation:** This unit provides **3-way isolation** (Input to Output to Power). This is critical for preventing ground loops and protecting sensitive PLC/DCS inputs. #### C. Power & Physical * **Construction:** Slim-line housing (approx. 29mm width) for DIN-rail mounting. * **Power Consumption:** Approx. 3.5 VA. * **Response Time:** Fast response, typically $\leq$ 0.5 seconds + 1 cycle of input frequency. --- ### 3. Functional Diagram (Internal Logic) The internal electronics follow this signal flow: 1. **Input Pulse Shaper:** Receives the raw frequency signal and converts it into a clean square wave. 2. **Microprocessor / Integrator:** Measures the period between pulses or counts pulses per unit of time to determine frequency. 3. **D/A Converter:** Translates the digital frequency value into a proportional analog voltage. 4. **Isolation Transformer:** Opto-isolators or magnetic transformers separate the output signal from the input and power supply. 5. **Output Driver:** Buffers and amplifies the signal to the required industrial level (e.g., 4-20mA). --- ### 4. Technical Summary Table | Feature | Specification | | :--- | :--- | | **Accuracy** | ±0.1% | | **Temperature Coefficient** | ±0.015% / °C | | **Insulation Resistance** | 100 M$\Omega$ at 500V DC | | **Dielectric Strength** | 2000V AC @ 1 minute | | **Mounting** | DIN rail |