The **M2VT-AB-R/K** is a specific model within the **M2VT Series** of signal conditioners manufactured by **M-System**. This device is a compact, plug-in type transducer designed to convert an AC voltage input into a standard DC output signal. --- ### 1. Model Code Breakdown The alphanumeric suffix identifies the specific electrical characteristics of the unit: | Code Segment | Description | Details | | :--- | :--- | :--- | | **M2VT** | Model Series | AC Voltage Transmitter (Transducer) | | **A** | Input Range | 0 – 100V AC | | **B** | Output Range | 2 – 10V DC | | **R** | Power Input | 24V DC | | **K** | Options | Multi-characteristic (standard accuracy/response) | --- ### 2. Key Electronic Specifications The internal circuitry is designed for industrial environments, focusing on isolation and signal integrity. * **Input Impedance:** Typically $\ge$ 1M$\Omega$ to prevent loading the source circuit. * **Response Time:** Approximately 0.5 seconds (0 – 90%). * **Isolation:** 3-way isolation (Input to Output to Power). * **Dielectric Strength:** 2000V AC @ 1 minute. * **Accuracy:** $\pm$0.3% of span. --- ### 3. Internal Components & Functional Blocks The electronics inside the M2VT-AB-R/K are divided into four primary stages: #### A. Input Conditioning Stage This section features a potential transformer or a high-impedance divider to step down the 100V AC signal safely. It often includes transient voltage suppressors (TVS) to protect against spikes. #### B. RMS or Mean Conversion Circuit Since the input is AC and the output is DC, the unit uses an active rectifier and filter circuit. It converts the sinusoidal AC waveform into a proportional DC voltage level. #### C. Isolation Barrier This is a critical electronic feature. It uses **optical or magnetic coupling** to ensure that electrical noise or high-voltage faults on the input side do not reach the PLC/DCS (Output side) or the Power Supply. #### D. Output Scaling Stage Operational amplifiers (Op-Amps) scale the rectified signal to the specific 2 – 10V DC range. Zero and Span adjustments (trimmer potentiometers) are accessible on the front panel for field calibration. --- ### 4. Technical Summary Table | Feature | Specification | | :--- | :--- | | **Standard** | IEC 61010-1 | | **Mounting** | Surface or DIN rail (via socket) | | **Construction** | Plug-in structure for easy maintenance | | **Operational Temp** | -5 to +55°C | ---