The **M2RTS-R-DG-R2/N** is a specific model of a **Resistance Thermometer Transmitter** (RTD Transmitter) belonging to the M2 Series manufactured by **M-System (MG CO., LTD.)**. This electronic component is designed to convert a signal from an RTD (Resistance Temperature Detector) sensor into a standard analog process signal (like 4–20mA or 1–5V DC). --- ## 1. Technical Specifications Breakdown The alphanumeric code describes the specific configuration of the device: | Code Segment | Description | Details | | :--- | :--- | :--- | | **M2RTS** | Model Series | RTD Transmitter (M2 Series) | | **-R** | Input Signal | Pt 100 (JIS '97, IEC) | | **-DG** | Output Signal | 0 – 10V DC / 4 – 20mA DC (Multi-output) | | **-R2** | Power Input | 24V DC | | **-N** | Options | No special options / Standard | --- ## 2. Key Electronic Components & Features ### A. Input Stage (RTD Interface) * **Sensor Type:** Designed primarily for Pt100 platinum resistance thermometers. * **Burnout Protection:** Includes an electronic circuit that detects a broken wire in the RTD. It can be configured to "Upscale" (max output) or "Downscale" (min output) upon failure. * **Linearization:** The internal circuitry compensates for the non-linear relationship between temperature and resistance in platinum sensors. ### B. Signal Conditioning & Isolation * **Isolation:** This unit features **three-way isolation** (Input to Output to Power). This prevents ground loops and protects sensitive PLC/DCS equipment from high-voltage surges on the field side. * **Adjustment Potentiometers:** Located on the front panel for "Zero" and "Span" calibration. ### C. Mechanical & Installation * **Construction:** Plug-in socket structure. The electronic module can be removed from its base without disconnecting the field wiring. * **Mounting:** DIN Rail or surface mounting. --- ## 3. Terminal Wiring Example Below is a generic representation of how the electronic pins are typically assigned: ```text [ Terminal Block ] 1. Output (+) 2. Output (-) 3. Power (+) 24V DC 4. Power (-) 0V 5. Input (A) <-- RTD Wire 1 6. Input (B) <-- RTD Wire 2 7. Input (B') <-- RTD Wire 3 (Compensation) 8. Ground ``` --- ## 4. Summary Table | Feature | Specification | | :--- | :--- | | **Accuracy** | ±0.1% of span | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Insulation Resistance** | 100 MΩ or more (500V DC) | | **Dielectric Strength** | 2000V AC @ 1 minute |