The **M2VF-4W1-R2/UL** is a high-performance signal conditioner (transmitter) manufactured by **M-System**. It is part of the M2 series, designed to convert a DC input signal into two isolated DC output signals. --- ### 1. Key Technical Specifications The following table summarizes the primary electronic characteristics of this specific model: | Parameter | Specification | |:---|:---| | **Model Series** | M2VF (V-Network Signal Conditioner) | | **Input Signal** | 4 to 20 mA DC | | **Output 1** | 1 to 5 V DC | | **Output 2** | 4 to 20 mA DC | | **Power Input** | 100 – 240V AC | | **Isolation** | 3-way isolation (Input to Output to Power) | | **Construction** | Plug-in style (socket mounted) | | **Certification** | UL/cUL approved (UL 61010-1) | --- ### 2. Functional Electronic Components The device operates through several internal stages to ensure signal integrity and safety: * **Input Stage:** Receives the 4-20mA loop signal. It typically features low input impedance to minimize the burden on the source loop. * **Isolation Barrier:** Uses optical or magnetic coupling to isolate the input, outputs, and power supply. This prevents ground loops and protects sensitive equipment from high-voltage surges. * **Signal Conversion (V-Network):** Utilizes a precision resistor network and operational amplifiers to linearize and scale the input into the desired voltage and current outputs. * **Power Supply Module:** An internal switching regulator that handles wide-range AC input (100-240V) and converts it to stable DC levels for the internal circuitry. --- ### 3. Terminal Wiring Diagram (Typical) The unit uses a standard 11-pin base. Below is the general electronic connection layout: | Terminal No. | Function | Description | |:---:|:---|:---| | **1** | Output 1 (+) | 1 – 5V DC | | **2** | Output 1 (-) | Common | | **3** | Output 2 (+) | 4 – 20mA DC | | **4** | Output 2 (-) | Common | | **5** | Input (+) | 4 – 20mA Source | | **6** | Input (-) | Return | | **7** | L (+) | Power Supply (AC) | | **8** | N (-) | Power Supply (AC) | --- ### 4. Application Use Case This part is commonly used in industrial automation when a single sensor (e.g., a pressure transmitter) needs to send its signal to two different devices simultaneously, such as: 1. **A Local Display (Output 1: 1-5V)** 2. **A Remote PLC/DCS System (Output 2: 4-20mA)** The **R2** suffix indicates the specific power voltage code (AC), and the **/UL** ensures compliance with North American safety standards for electronic equipment.