The **M2RTS-S-BA-R2/N** is a specific model of an **RTD (Resistance Temperature Detector) Transmitter** from the M2 Series, manufactured by **M-System**. These devices are used in industrial automation to convert signals from temperature sensors into standard analog signals for PLCs or DCS systems. --- ### 1. Model Breakdown (Specifications) The alphanumeric code defines the specific hardware configuration of the transmitter: | Component Code | Description | Details | | :--- | :--- | :--- | | **M2RTS** | **Model Series** | RTD Transmitter (Plug-in base) | | **-S** | **Input Type** | Pt 100 (ITS-90) | | **-BA** | **Output Type** | 4 – 20 mA DC (Current Loop) | | **-R2** | **Power Input** | 110V AC (Standard range 85 – 132V AC) | | **-N** | **Option** | No special options (Standard) | --- ### 2. Key Electronic Features The M2RTS is designed for high-precision industrial signal conditioning. Its internal electronics focus on three primary functions: #### A. Signal Conditioning & Linearization RTDs do not have a perfectly linear relationship between resistance and temperature. The internal circuitry of the M2RTS performs **linearization**, ensuring that the 4-20mA output is directly proportional to the temperature sensed, rather than the raw resistance. #### B. 3-Wire Resistance Compensation The "S" (Pt100) input typically utilizes a 3-wire lead wire compensation circuit. This cancels out the resistance of the wires connecting the sensor to the transmitter, preventing temperature measurement errors caused by long cable runs. #### C. Galvanic Isolation This model provides **3-way isolation**. This means the electronic paths for the **Input**, **Output**, and **Power** are electrically separated. * **Benefit:** Prevents ground loops, protects sensitive PLC inputs from high-voltage surges, and reduces electromagnetic noise. --- ### 3. Technical Parameters | Feature | Specification | | :--- | :--- | | **Input Resistance** | ~1M $\Omega$ (during power off) | | **Burnout Protection** | Upscale standard (Downscale optional) | | **Accuracy** | $\pm$0.1% of span | | **Response Time** | $\leq$ 0.5 seconds (0 – 90%) | | **Insulation Resistance** | $\geq$ 100 M$\Omega$ at 500V DC | | **Construction** | Plug-in style (Base socket included) | --- ### 4. Terminal Wiring Diagram (General) When wiring the electronic base, the following pin logic is typically applied: 1. **Input (RTD):** Connected to terminals for the Pt100 sensor (A, B, B'). 2. **Output (4-20mA):** Connected to the receiving device (PLC/Controller). 3. **Power:** 110V AC supply to the dedicated power pins. ---