The **M2RTS-S-DF-R2/UL** is a specialized electronic signal conditioner and transmitter produced by **M-System** (now part of MG CO., LTD). It is primarily used in industrial automation and process control to convert resistance signals from sensors into standard DC voltage or current signals. ### 1. General Specifications This device is a high-performance, plug-in signal conditioner designed for rail mounting. | Feature | Specification | | :--- | :--- | | **Model Series** | M2 Series (Mini-M) | | **Input Type** | RTD (Resistance Temperature Detector) or Potentiometer | | **Output Type** | DC Voltage or Current (Standardized) | | **Construction** | Plug-in style with base socket | | **Isolation** | 3-way isolation (Input, Output, Power) | | **Safety Approvals** | UL/cUL recognized | --- ### 2. Breakdown of the Part Number The alphanumeric code describes the specific hardware configuration: | Code Segment | Meaning | Details | | :--- | :--- | :--- | | **M2RTS** | Model Category | RTD Transmitter | | **S** | Output Type | Current output (typically 4–20mA DC) | | **DF** | Input Type | DIN (Pt 100) or specific resistance range | | **R2** | Power Input | 24V DC (approx. ±10% range) | | **UL** | Certification | UL/cUL Standard Approval | --- ### 3. Key Electronic Functions #### A. Signal Conversion The unit takes the ohmic resistance value from an RTD (like a Pt100) and converts it into a linear 4-20mA signal. This allows temperature data to be sent over long distances to a PLC or DCS without signal degradation caused by wire resistance. #### B. 3-Way Isolation The device electronically separates the input circuit, the output circuit, and the power supply. * **Purpose:** Prevents ground loops, protects sensitive downstream equipment from high-voltage surges, and reduces electromagnetic interference (EMI). #### C. Linearization RTD sensors are not perfectly linear. The internal electronics of the M2RTS-S-DF-R2/UL apply a linearization curve to ensure the output current is precisely proportional to the temperature, not just the raw resistance. --- ### 4. Technical Data Sheet Summary * **Accuracy:** Typically ±0.1% to ±0.2% of span. * **Response Time:** ≤ 0.5 seconds (0 to 90%). * **Insulation Resistance:** 100 MΩ or more with 500V DC. * **Dielectric Strength:** 2000V AC @ 1 minute (Input to Output to Power to Ground). * **Housing Material:** Flame-resistant resin (Black). ---