The **M2RT-0C-R** is a specific model within the **M2 series of remote terminal units (RTUs)** or signal conditioners, typically manufactured by companies like **M-System**. These devices are designed for industrial automation to convert, isolate, and transmit signals between field instruments and control systems (PLC/DCS). --- ### 1. Model Breakdown (Nomenclature) The part number can generally be decoded as follows: | Code Segment | Description | Specific Detail | |:---|:---|:---| | **M2** | Series Type | Mini-M Series Plug-in Signal Conditioner | | **RT** | Function | RTD (Resistance Temperature Detector) Transmitter | | **0** | Input | Standard RTD Input (often configurable for Pt100) | | **C** | Output | Current Output (4 – 20mA DC) | | **R** | Power Supply | 24V DC Power | --- ### 2. Electronic Specifications The internal electronics are designed for high precision and noise immunity in harsh industrial environments. * **Input Section:** * Designed for 3-wire RTD sensors (like Pt100). * Features lead-wire resistance compensation to ensure accuracy over long distances. * **Isolation:** * Provides **3-way isolation** (Input to Output to Power). * Typically rated for 2000V AC isolation to protect sensitive control equipment from surges. * **Output Loop:** * Active 4-20mA DC output. * Load resistance tolerance: Usually up to 550 $\Omega$. * **Adjustments:** * Equipped with front-facing **Zero and Span adjustments** (potentiometers) for field calibration. --- ### 3. Key Electronic Features * **Linearization:** The internal circuitry includes a linearization circuit to compensate for the non-linear resistance characteristics of the RTD sensor. * **Burnout Protection:** Includes a "Burnout" feature. In the event of a sensor wire break, the electronics will drive the output to a specific limit (e.g., above 20mA or below 4mA) to alert the control system of a failure. * **Form Factor:** Plug-in base construction. The electronic module can be removed from the base without disconnecting the wiring, facilitating easy maintenance. --- ### 4. Technical Summary Table | Feature | Specification | |:---|:---| | **Accuracy** | ±0.1% of span | | **Temperature Coefficient** | ±0.015% / °C | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Power Consumption** | Approx. 2W | | **Mounting** | DIN Rail (via plug-in socket) | ---