The **M2VT-A1-R/Q** is a high-performance **Thin-Type Signal Isolator** (transducer) manufactured by **M-System**. It is designed to convert a DC input signal into an isolated DC output signal, typically used in industrial automation and process control to prevent ground loops and protect sensitive equipment. --- ### 1. Key Technical Specifications Below are the primary electronic characteristics of the M2VT-A1-R/Q: | Parameter | Specification | |:---|:---| | **Model Type** | M2VT (Mini-M Series) | | **Input Signal (A1)** | 4 – 20 mA DC (Input resistance 250 Ω) | | **Output Signal (R)** | 1 – 5 V DC (Load resistance 5000 Ω minimum) | | **Power Supply (Q)** | 100 – 240 V AC (Operating range 85 – 264 V AC) | | **Isolation** | 3-way isolation (Input to Output to Power) | | **Accuracy** | ±0.1% of span | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | --- ### 2. Functional Components The internal electronic architecture consists of several critical stages: #### A. Input Circuit (Current-to-Voltage) Since the input is 4-20 mA, the device utilizes a high-precision **shunt resistor** (250 Ω) to convert the current loop into a voltage signal. This stage also includes surge protection to prevent damage from line spikes. #### B. Isolation Barrier This is the core "electronic part" of the device. It uses **magnetic or optical coupling** to physically separate the input, output, and power circuits. This prevents high-voltage transients on the field side from reaching the PLC/DCS. #### C. Signal Conditioning & Linearization The internal operational amplifiers (Op-Amps) ensure that the output remains strictly linear relative to the input. The "A1-R" configuration specifically maps the 4-20mA curve to a 1-5V curve. #### D. Power Supply Unit (PSU) The "Q" suffix indicates an AC power input. It contains: * **A Rectifier/Filter:** Converts AC to DC. * **A Switching Regulator:** Ensures stable internal DC voltage regardless of fluctuations in the 100-240V AC line. --- ### 3. Physical & Terminal Layout The unit is designed for DIN-rail mounting with a "plug-in" base. ```text Terminal Function --------------------- 1 - 2 Output (+) / (-) 3 - 4 Input (+) / (-) 5 - 6 Power (L) / (N) ``` ### 4. Application Use-Case The **M2VT-A1-R/Q** is typically used when a field sensor (transmitting 4-20mA) needs to be connected to a controller that only accepts a 1-5V voltage signal, or when the system requires high-voltage isolation (up to 2000V AC) to ensure signal integrity in electrically "noisy" environments. ---