The part number **M2RTS-R-CB-R2/Q** refers to a high-precision **RTD (Resistance Temperature Detector) Transmitter** from the M2-Series, typically manufactured by **M-System** (now MG CO., LTD). This device is designed to convert signals from a temperature sensor (RTD) into a standard industrial DC signal. --- ## 1. Part Number Breakdown The suffixing in the model number defines the specific electronic hardware configuration: | Code Segment | Description | Specific Detail | | :--- | :--- | :--- | | **M2RTS** | Base Model | RTD Transmitter (Plug-in base) | | **-R** | Input Type | RTD Input (Standard Pt 100 or JPt 100) | | **-C** | Output Signal | 4 to 20 mA DC | | **-B** | Power Input | 100V AC | | **-R2** | Option Code | High-speed response / Special Accuracy | | **-Q** | Special Suffix | Conformal coating or specific quality labeling | --- ## 2. Key Electronic Specifications The internal circuitry is designed for industrial signal conditioning, featuring high isolation and signal linearization. ### Input Characteristics * **Sensor Compatibility:** Pt 100 (IEC), JPt 100 (JIS). * **Wiring:** 3-wire system. * **Burnout Protection:** Upscale (standard) or Downscale (optional). ### Output & Performance * **Output Signal:** 4 – 20 mA DC (Load resistance max 600Ω). * **Accuracy:** ±0.1% of span. * **Isolation:** 2000V AC (Input to output to power to ground). * **Response Time:** Approx. 0.5 seconds (standard) or faster depending on the `R2` variation. --- ## 3. Physical & Wiring Configuration The unit uses a **10-pin base** for plug-in installation, allowing for maintenance without disconnecting wires from the base. ### Typical Wiring Diagram ```text [RTD SENSOR] [M2RTS UNIT] [PLC / RECEIVER] Term A -----------> Pin 1 (Input +) Term B -----------> Pin 2 (Input -) Term B' -----------> Pin 3 (Sense) Pin 4 (Output +) --------> (+) 4-20mA Pin 5 (Output -) --------> (-) 4-20mA Pin 7 (Power L) --------> 100V AC Pin 8 (Power N) --------> 100V AC ``` --- ## 4. Electronic Features * **Linearization Circuit:** Since RTD resistance changes are not perfectly linear with temperature, the electronic module includes a linearization circuit to ensure the 4-20mA output is proportional to the temperature, not just the ohms. * **Zero/Span Adjustment:** Accessible from the front panel for field calibration. * **High Dielectric Strength:** The unit utilizes optoisolators to prevent electrical noise from the field (sensor side) from damaging the control system (PLC side). ---