The **M2RTS-S-DB-R2/CE** is a high-precision, industrial-grade RTD (Resistance Temperature Detector) transmitter, typically manufactured by companies like **M-System**. It is designed to convert temperature signals from an RTD sensor into a standardized analog signal. --- ### 1. Key Technical Specifications | Feature | Specification | |:---|:---| | **Input Type** | RTD (Pt100, Pt500, Pt1000, Ni508.4, etc.) | | **Output Type** | Analog (4–20 mA DC or 0–10V DC typically) | | **Power Supply** | 100 – 240V AC (Standard CE version) | | **Mounting** | DIN Rail Mounting | | **Accuracy** | ±0.1% of span | | **Isolation** | 3-way isolation (Input to Output to Power) | --- ### 2. Breakdown of the Model Code The alphanumeric suffix provides specific details about the electronic configuration: * **M2RTS**: Series identifier (Mini-M Series RTD Transmitter). * **-S**: Signifies the input/output range is "Smart" or Field-configurable. * **-DB**: * **D**: Power Input (typically 100-240V AC). * **B**: Output signal code (often 2–10V or 4–20mA depending on specific internal jumper settings). * **-R2**: Indicates the specific revision or power requirement (often 24V DC for R, but R2 specifically relates to AC power in some series). * **-CE**: Conformité Européenne (Meets EU safety, health, and environmental protection requirements). --- ### 3. Electronic Components & Functionality #### Signal Conditioning The internal circuitry uses a high-linearity amplifier to process the small resistance changes from the RTD. It compensates for **lead-wire resistance**, ensuring that the distance between the sensor and the transmitter does not degrade accuracy. #### 3-Way Isolation This is a critical electronic feature. The internal transformer and optoisolators separate: 1. **Input Circuit** (Sensor side) 2. **Output Circuit** (PLC/Controller side) 3. **Power Circuit** (Mains/Power supply) *Benefit:* This prevents ground loops and protects sensitive equipment from high-voltage surges. #### Burnout Protection The device includes "Upscale" or "Downscale" burnout protection. If the RTD wire breaks, the electronic output will automatically drive to a maximum (e.g., 20mA) or minimum (e.g., 4mA) value to alert the control system of a hardware failure. --- ### 4. Typical Wiring Diagram ```mermaid graph LR A[RTD Sensor] -->|3-Wire Connection| B(M2RTS Transmitter) B -->|4-20mA Signal| C[PLC / SCADA] D[100-240V AC] -->|Power| B ``` ---