The **M2RTS-R-A1D-R2** is a specific model of a **Resistance Temperature Detector (RTD) Transmitter**. It is part of the M2 series developed by **M-System** (now MG CO., LTD). Its primary function is to convert a signal from an RTD temperature sensor into a standard isolated DC output. --- ### 1. Model Code Breakdown Understanding the specific electronic configuration requires decoding the model suffix: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **M2RTS** | Model Series | RTD Transmitter (Plug-in base) | | **R** | Power Input | 24V DC | | **A** | Input Type | RTD (Standard Pt 100, etc.) | | **1** | Output 1 | 4 – 20 mA DC | | **D** | Output 2 | 0 – 10 V DC | | **R2** | Standard | High-accuracy / Revised designator | --- ### 2. Key Electronic Specifications The internal circuitry of the M2RTS is designed for high-precision industrial signal conditioning. * **Isolation:** This unit features **3-way isolation** (Input to Output to Power). This prevents ground loops and protects sensitive PLC/DCS equipment from electrical surges on the sensor side. * **Burnout Protection:** It includes an electronic "Burnout" circuit. If the RTD wire breaks, the transmitter can be configured to drive the output to a specific limit (Upscale or Downscale) to alert the control system. * **A/D and D/A Conversion:** The device uses a microprocessor-based system to linearize the non-linear resistance curve of the RTD into a linear voltage/current signal. --- ### 3. Technical Parameters | Feature | Specification | | :--- | :--- | | **Input Signal** | 3-wire RTD (Pt 100, Pt 50, JPt 100, etc.) | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Accuracy** | ±0.1% of span | | **Temperature Coefficient** | ±0.015% per °C | | **Dielectric Strength** | 2000V AC @ 1 minute | | **Mounting** | Surface or DIN rail (Plug-in socket) | --- ### 4. Connection Diagram (General) The electronics are housed in a plug-in module that connects to a base socket. ```text Input (RTD) Power (24V) Outputs [1] --- A [7] --- (+) [4] --- Output 1 (+) [2] --- B [8] --- (-) [5] --- Output 1 (-) [3] --- B' (Comp) [10] -- Output 2 (+) [11] -- Output 2 (-) ``` ---