The **M2VT-CD-R/N** is a specific model within the **M2VT series** of signal conditioners manufactured by **M-System**. This device is a compact, plug-in type signal transmitter designed to convert a DC input into a standard process signal. Below is a breakdown of the electronic components, specifications, and technical features of this unit. --- ### 1. Model Code Breakdown The model name defines the specific electronic configuration of the device: | Component | Code | Description | | :--- | :--- | :--- | | **Series** | M2VT | Mini-M series Signal Conditioner (Voltage/Current Input) | | **Input** | C | 1 – 5V DC | | **Output** | D | 0 – 20mA DC (Programmable/Scalable) | | **Power Input** | R | 24V DC | | **Standard** | /N | No special options (Standard version) | --- ### 2. Core Electronic Features The M2VT series is known for its high-performance analog-to-digital conversion and isolation capabilities. * **Isolation System:** It features a **3-way isolation** system (Input to Output to Power). This is achieved through high-speed optocouplers or internal transformers to prevent ground loops and protect sensitive PLCs/DCSs from electrical noise. * **Microprocessor-Based:** Unlike pure analog transmitters, the "VT" series uses internal digital processing, allowing for precise calibration and linear conversion. * **Front-Panel Indicators:** * **Power LED:** Indicates the status of the internal DC-DC converter. * **Zero/Span Adjustments:** Multi-turn potentiometers for fine-tuning the analog output. * **A/D and D/A Converters:** High-resolution converters (typically 12 to 16-bit) ensure that the voltage input is accurately represented in the current output. --- ### 3. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Impedance** | 1 M$\Omega$ minimum | | **Output Load Resistance** | 0 – 600 $\Omega$ | | **Accuracy** | $\pm$0.1% of span | | **Response Time** | $\le$ 0.5 seconds (0 – 90%) | | **Insulation Resistance** | 100 M$\Omega$ at 500V DC | | **Dielectric Strength** | 2000V AC @ 1 minute (Input to Output to Power) | --- ### 4. Terminal Connections The device uses a 10-pin base socket (typically M-System's standard). 1. **Input (+/-):** Receives the 1-5V DC signal from a sensor or transducer. 2. **Output (+/-):** Provides the 0-20mA DC signal to the controller. 3. **Power (+/-):** Connects to the 24V DC supply. --- ### 5. Application Usage The M2VT-CD-R/N is electronically engineered for: * **Signal Level Conversion:** Changing a high-impedance voltage signal into a low-impedance current loop (0-20mA) for long-distance transmission. * **Noise Mitigation:** Using the 2000V AC isolation to "clean" signals in industrial environments with high electromagnetic interference (EMI). ---