The **M2RTS-R-B2-R2/CE** is a high-precision, plug-in type RTD (Resistance Temperature Detector) transmitter manufactured by **M-System** (now MG CO., LTD). It is designed to convert signals from a temperature sensor into a standard industrial DC output. --- ### 1. Model Code Breakdown Understanding the specific electronic configuration through the model suffix: | Code Segment | Description | Specific Detail | |:---|:---|:---| | **M2RTS** | Model Series | RTD Transmitter (Plug-in type) | | **-R** | Power Input | 24V DC | | **-B** | Input Signal | Pt 100 (ITS-90) | | **2** | Output 1 | 4 – 20 mA DC (Load resistance 550 $\Omega$ max) | | **-R** | Output 2 | 4 – 20 mA DC (Load resistance 550 $\Omega$ max) | | **2** | Options | Standard (No special coating) | | **-R2** | Design/Version | Standard Version 2 | | **-CE** | Certification | CE Marking compliant | --- ### 2. Key Electronic Specifications The internal circuitry is designed for high isolation and linear signal processing. * **Input Circuitry:** Designed for a 3-wire Pt 100 sensor. It uses a constant current bridge to sense resistance changes. * **Isolation:** 4-way isolation (Input to Output 1 to Output 2 to Power). * **Burnout Protection:** Upscale burnout is standard (the output goes to max if the sensor wire breaks). * **Response Time:** $\leq$ 0.5 seconds (0 – 90%). * **Accuracy:** $\pm$0.1% of span. --- ### 3. Connection Diagram (General) The unit uses a M3 screw terminal base. | Terminal No. | Function | Description | |:---|:---|:---| | 1 | Output 1 (+) | Positive 4-20mA | | 2 | Output 1 (-) | Negative 4-20mA | | 3 | Output 2 (+) | Positive 4-20mA | | 4 | Output 2 (-) | Negative 4-20mA | | 5 | Input (A) | RTD Terminal A | | 6 | Input (B) | RTD Terminal B | | 7 | Input (B) | RTD Terminal B (compensation) | | 12 | Power (+) | +24V DC | | 13 | Power (-) | 0V DC | --- ### 4. Installation and Physical Parts * **Housing Material:** Flame-resistant resin (black). * **Mounting:** DIN rail or surface mounting via a plug-in socket base. * **Adjustments:** Front-facing Zero and Span adjustments (multi-turn potentiometers) for field calibration.