The **M2RTS-R-DA-M2/CE** is a high-performance **Thermocouple Transmitter** from the M2-Series manufactured by **M-System** (now part of MG CO., LTD). This electronic component is designed to convert signals from a thermocouple sensor into a standard industrial DC output. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Model Series** | M2-Series Mini-M Configuration | | **Input Type** | Thermocouple (Multiple types supported via configuration) | | **Output Type** | DC Output (Current or Voltage) | | **Power Input** | 100 – 240V AC (Standard for /M2 suffix) | | **Accuracy** | ±0.1% of span | | **Isolation** | 3-way isolation (Input to Output to Power) | | **Mounting** | DIN Rail Mounting (Plug-in base) | --- ### 2. Breakdown of the Model Suffixes The alphanumeric code provides specific details about the electronic capabilities of this unit: * **M2RTS**: Base model designation for a Thermocouple Transmitter. * **-R**: Indicates the input type is a **Remote Programming** or field-configurable version. * **-DA**: This typically refers to the **Output Code**. Usually, "A" stands for 4–20mA DC, while "D" signifies specific voltage ranges or custom scaling. * **-M2**: This is the **Power Supply** code. "M2" specifically denotes a wide-range AC power supply (100–240V AC). * **CE**: This confirms the unit meets **European Conformity (CE Marking)** standards for electromagnetic compatibility (EMC) and safety. --- ### 3. Core Electronic Functions #### A. Signal Conditioning and Cold Junction Compensation (CJC) Thermocouples generate a low-millivolt signal. This device includes an internal electronic sensor to measure the temperature at the terminal block (Cold Junction) and mathematically corrects the signal to ensure accurate temperature readings regardless of ambient temperature changes. #### B. 2000V AC Isolation The device features a transformer-based or opto-isolated circuit that separates the input, output, and power supply. This prevents ground loops and protects sensitive PLC/DCS controllers from high-voltage surges on the sensor side. #### C. Burnout Protection In the event of a sensor wire break (Thermocouple failure), the electronic circuit is designed to drive the output signal to a specific "safety" state (either Upscale >20mA or Downscale <4mA) to alert the control system of a fault. --- ### 4. Wiring Diagram Overview ```text [ Thermocouple ] ----> [ Terminals 4(+) & 5(-) ] [ Power Supply ] ----> [ Terminals 7(L) & 8(N) ] [ DC Output ] ----> [ Terminals 1(+) & 2(-) ] ``` ---