The **M2RTS-R-CZ-R2/CE** is a high-precision, industrial-grade RTD (Resistance Temperature Detector) transmitter manufactured by **M-System**. It is designed to convert signals from a temperature sensor (typically Pt100) into a standard analog signal (like 4-20mA or 1-5V DC). ### 1. Key Technical Specifications | Feature | Description | | :--- | :--- | | **Model Series** | M2RTS (Plug-in Temperature Transmitter) | | **Input Type** | RTD (Resistance Temperature Detector) | | **Output** | Field-configurable analog signal (Current or Voltage) | | **Power Input** | Options typically include 100–240V AC or 24V DC | | **Accuracy** | ±0.1% of span | | **Response Time** | $\leq$ 0.5 seconds (0 to 90%) | | **Isolation** | 3-way isolation (input to output to power) | --- ### 2. Breakdown of the Model Suffix (R-CZ-R2/CE) Based on M-System's nomenclature, the code breaks down as follows: * **R**: Specifies the Output type (often signifies a specific voltage/current range or a special characteristic). * **CZ**: Often refers to the **Input Sensor Type**. In this series, 'Z' usually indicates a custom or specified range for a Pt100 or Pt1000 sensor. * **R2**: Indicates the **Power Supply**. "R2" typically corresponds to **11V – 27V DC**. * **CE**: This is the **Certification Mark**, indicating the unit complies with European Economic Area (EEA) health, safety, and environmental protection standards. --- ### 3. Internal Electronic Components & Functionality The device operates using several critical electronic stages: 1. **Linearization Circuit**: RTDs are not perfectly linear. The internal electronics apply a linearization algorithm to ensure the output is proportional to the temperature, not the resistance. 2. **Burnout Protection**: A safety feature that drives the output to a specific limit (e.g., above 20mA or below 4mA) if the sensor wire breaks. 3. **Galvanic Isolation**: Uses optoisolators or transformers to prevent electrical noise and ground loops from traveling between the field sensor and the PLC/DCS. 4. **Zero/Span Adjustments**: Located on the front panel, these potentiometers allow for fine-tuning the electronic calibration in the field. --- ### 4. Wiring Pin-out (General Reference) ```text Terminal | Function ---------|-------------------- 1 | Output (+) 2 | Output (-) 3 | Power (L/+ for DC) 4 | Power (N/- for DC) 5 | RTD Input (A) 6 | RTD Input (B) 7 | RTD Input (B') - For 3-wire compensation ``` ---