The **M2RTS-R-C3-R2** 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 into a standard DC output signal suitable for PLCs or data loggers. --- ## 1. Component Specifications The model code breaks down into specific electronic characteristics: | Code Segment | Feature | Description | | :--- | :--- | :--- | | **M2RTS** | Series Name | Mini-M series RTD transmitter | | **-R** | Power Input | 24V DC (Standard industrial power) | | **-C3** | Input Type | Pt 100 (ITS-90) RTD sensor | | **-R2** | Output Type | 4 - 20 mA DC (Current loop) | ### Technical Parameters * **Accuracy:** ±0.1% of span. * **Response Time:** ≤ 0.5 seconds (0 – 90%). * **Isolation:** 3-way isolation (Input to Output to Power). * **Mounting:** DIN rail mounting. * **Burnout Protection:** Upscale (standard) or Downscale. --- ## 2. Key Electronic Features ### 3-Way Isolation This part features 2000V AC isolation between the input, output, and power supply. This is critical in industrial environments to: * Eliminate ground loops. * Protect sensitive control equipment (like PLCs) from high-voltage surges on the sensor side. ### Linearization Circuit Since RTD sensors (like Pt100) are not perfectly linear, the M2RTS contains an internal **Linearization Circuit**. It mathematically corrects the resistance-to-temperature curve to ensure the 4-20mA output is exactly proportional to the temperature. ### Leadwire Resistance Compensation The unit utilizes a **3-wire connection system**. It cancels out the resistance of the wires leading to the sensor, ensuring that the distance between the transmitter and the sensor does not degrade the measurement accuracy. --- ## 3. Wiring Diagram (Basic Representation) ```text Input (RTD) Transmitter Output/Power [ 1 ] <--- A +-----------+ [ 4 ] ---> + Output (4-20mA) [ 2 ] <--- B | M2RTS | [ 5 ] ---> - Output [ 3 ] <--- B' | | [ 7 ] <--- + 24V DC Power +-----------+ [ 8 ] <--- - 24V DC Power ``` --- ## 4. Typical Applications 1. **Chemical Processing:** Monitoring reactor temperatures. 2. **HVAC Systems:** High-precision air duct temperature measurement. 3. **Food & Beverage:** Ensuring pasteurization temperatures are strictly maintained.