The model **M2RTS-R-BF-R2/CE** belongs to the **M2 Series** of signal conditioners manufactured by **M-System**. This specific device is a thermocouple transmitter designed to convert temperature signals into standard process signals. --- ### 1. Technical Specifications Breakdown The alphanumeric code describes the specific hardware configuration of the module: | Component | Code | Description | | :--- | :--- | :--- | | **Model** | M2RTS | Thermocouple Transmitter (Linearization type) | | **Configuration** | R | Removable terminal block | | **Input** | BF | Universal Input (Field-configurable for Types K, E, J, T, B, R, S, N) | | **Output** | R2 | 4 – 20 mA DC (Current output) | | **Power Input** | SLASH | Separator | | **Power Supply** | CE | 100 – 240V AC | --- ### 2. Key Electronic Components & Features #### A. Signal Input Section * **Cold Junction Compensation (CJC):** The unit includes an internal thermistor to compensate for the ambient temperature at the terminal block, ensuring accurate thermocouple readings. * **Burnout Protection:** It features an electronic circuit that detects an open circuit (broken wire) in the thermocouple and drives the output to a pre-set level (usually upscale). #### B. Isolation Barrier The "M2" series is known for its **three-way isolation**: 1. **Input to Output** 2. **Input to Power** 3. **Output to Power** *This prevents ground loops and protects sensitive control equipment (like a PLC) from high-voltage surges on the field side.* #### C. Power Supply (CE Rating) * **Switch-Mode Power Supply:** The "CE" designation indicates a wide-range AC power input (100-240V). It uses internal rectification and regulation to provide stable DC voltage to the internal sensing circuitry. #### D. Output Stage * **Current Loop (R2):** The output utilizes a precision operational amplifier and a transistor stage to provide a stable 4-20mA signal, capable of driving loads up to 550 $\Omega$. --- ### 3. Installation Summary * **Mounting:** DIN rail mounting. * **Terminals:** M3 screw terminals (removable for easy maintenance). * **Adjustments:** Front-facing Zero and Span adjustments (potentiometers) for fine-tuning the calibration.