The **M2VS-AA-R2/CE** is an ultra-slim, signal conditioner (isolator) manufactured by **M-System**. It is designed to convert an analog input signal into a standard analog output signal while providing galvanic isolation between the input, output, and power supply. ### 1. General Specifications | Feature | Description | | :--- | :--- | | **Model Series** | M2V Series (Ultra-slim signal conditioners) | | **Input Signal** | 4 – 20 mA DC | | **Output Signal** | 4 – 20 mA DC | | **Power Supply** | 24V DC | | **Isolation** | 3-way isolation (Input to Output to Power) | | **Standards** | CE Marking certified | --- ### 2. Breakdown of the Model Number The suffix **M2VS-AA-R2/CE** follows a specific nomenclature: * **M2VS**: The model type (Voltage/Current Input Signal Conditioner). * **A (First A)**: Input Code (4 – 20 mA DC). * **A (Second A)**: Output Code (4 – 20 mA DC). * **R2**: Power Input (24V DC). * **CE**: Confirms compliance with European safety and EMC standards. --- ### 3. Electronic Components & Features #### A. Signal Isolation & Protection * **Galvanic Isolation:** Uses internal optoisolators or transformers to break the ground loop, preventing noise from traveling from the field devices to the PLC/DCS. * **Dielectric Strength:** Usually rated for 2000V AC @ 1 minute. #### B. Precision Circuitry * **Operational Amplifiers:** High-precision op-amps ensure a linear transfer function between the input and output. * **Zero/Span Adjustments:** Located on the front panel, these allow for fine-tuning the electronic calibration (usually ±5%). #### C. Physical Construction * **Housing:** Flame-resistant resin (Black). * **Mounting:** DIN Rail mounting. * **Terminals:** M3 screw terminals for secure electronic connections. --- ### 4. Technical Performance Data | Parameter | Value | | :--- | :--- | | **Accuracy** | ±0.1% | | **Temperature Coefficient** | ±0.015% per °C | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Insulation Resistance** | ≥ 100 MΩ with 500V DC | | **Load Resistance** | Up to 550 Ω | --- ### 5. Application Circuit Example Typically, this device is used in industrial automation environments: 1. **Input Side:** Connected to a 2-wire or 4-wire transmitter (e.g., Pressure or Temperature sensor). 2. **Output Side:** Connected to an Analog Input card of a PLC. 3. **Function:** It protects the PLC from high-voltage surges and eliminates ground loop interference which can cause signal inaccuracies.