The **M2VF-AFW-R2/CE** is a high-performance **M2-series signal conditioner** (isolator) manufactured by **M-System**. It is specifically designed to convert a standard DC input signal into two isolated DC output signals. --- ### ## Technical Specifications Below are the primary electronic characteristics of this specific model: | Feature | Specification | | :--- | :--- | | **Model Series** | M2-Series (Mini-M) | | **Input Signal** | 4 to 20 mA DC | | **Output 1** | 4 to 20 mA DC | | **Output 2** | 1 to 5 V DC | | **Power Input** | 100 to 240V AC | | **Isolation** | 3-way isolation (Input to Output to Power) | | **Mounting** | DIN Rail Mounting | | **Standards** | CE Marking compliant | --- ### ### Electronic Components & Functionality #### 1. Input Section The input receives a 4–20 mA current loop. It typically features a low-impedance shunt resistor to convert the current into a voltage signal for internal processing. It includes surge protection to safeguard the unit from line transients. #### 2. Isolation Barrier (Galvanic Isolation) This is the core "electronic part" of the device. It uses **Optical or Magnetic Coupling** to transfer the signal across an isolation barrier. * **Purpose:** Eliminates ground loops and protects sensitive control systems (like a PLC or DCS) from high-voltage surges on the field side. * **Isolation Resistance:** Typically 100 MΩ or more with 2000V AC @ 1 minute. #### 3. Signal Converter & Dual Output The internal circuitry splits the normalized signal into two independent channels: * **Channel 1:** Re-transmits the 4-20mA current loop. * **Channel 2:** Provides a high-impedance 1-5V voltage output. * **Zero/Span Adjustments:** Accessible via the front panel to calibrate the output offset and gain. #### 4. Power Supply Unit (AFW Designation) The "AFW" code indicates a universal AC power transformer and rectification circuit. * **AC Input:** 85 to 264V AC. * **Internal Regulation:** Uses a switching regulator to provide stable DC voltages for the internal Op-Amps and isolation circuitry. --- ### ### Wiring Configuration The device uses a base socket for easy maintenance. Below is the typical terminal logic: ```text [ Power ] -------- (13) L (Live) (14) N (Neutral) [ Input ] -------- (5) + (4-20mA) (6) - [ Out 1 ] -------- (1) + (4-20mA) (2) - [ Out 2 ] -------- (3) + (1-5V) (4) - ``` ---