The **M2RTS-R-CD-R2/CE** is a high-performance **Resistance Temperature Detector (RTD) Transmitter** manufactured by **M-System**. This device is part of the M2 series, designed to convert signals from an RTD sensor into a standard industrial DC signal. --- ### ## Technical Specifications Overview The following table summarizes the core electronic characteristics of the device: | Feature | Specification | | :--- | :--- | | **Model Series** | M2RTS (Plug-in RTD Transmitter) | | **Input Signal** | RTD (Pt 100, JPt 100, etc.) | | **Output Signal** | 4 – 20 mA DC | | **Power Input (R)** | 24V DC | | **Configuration (CD)** | PC Programmable (Linearization, Range, RTD Type) | | **Standards (CE)** | CE Marking compliant | | **Accuracy** | ±0.1% of span | | **Isolation** | 3-port isolation (Input - Output - Power) | --- ### ## Component Breakdown & Functionality The "Electronic Parts" of this transmitter function together to ensure signal integrity in harsh industrial environments: 1. **Input Conditioning Circuit:** * Designed for 3-wire RTDs to compensate for lead-wire resistance. * Features **Burnout Protection**: In the event of a sensor failure, the output can be set to go "Upscale" (max) or "Downscale" (min). 2. **A/D Converter & Microprocessor:** * The **CD** designation indicates it is digital-based. The analog resistance is converted into a digital signal, linearized via a lookup table/algorithm, and then processed. 3. **Isolation Barrier:** * Uses high-quality optical or magnetic isolators to prevent ground loops and protect the control system from high-voltage surges (up to 2000V AC). 4. **D/A Converter & Output Driver:** * Converts the processed signal back to a precise 4-20mA current loop. The **R2** suffix often denotes specific output load resistances or upgraded electronic revisions. --- ### ## Wiring Diagram (Simplified) ```text [ RTD Sensor ] [ M2RTS Transmitter ] [ Control System ] (Input) (Isolation) (Output) A O-----------------------[ In ]-----------------------O (+) B O-----------------------[ CPU]-----------------------O (-) 4-20mA B' O-----------------------[ Out] | [ Power 24V DC ] ``` --- ### ## Key Advantages * **High Density:** The plug-in base design allows for easy maintenance without disconnecting wires. * **Programmability:** Using a PC or a dedicated programmer, users can change the temperature range (e.g., 0-100°C to 0-500°C) without hardware changes. * **Industrial Hardening:** Built to withstand EMI/RFI interference common in factory settings.