The **M2RTS-S-AD-R/N** is a specific model of a **Resistance Transmitter** (RTD Transmitter) within the M2 Series, manufactured by **M-System**. This device is used in industrial automation to convert a signal from an RTD (Resistance Temperature Detector) into a standard DC output signal. --- ### 1. Model Breakdown The suffix configuration defines the specific electronic capabilities of the unit: | Code Segment | Feature | Description | | :--- | :--- | :--- | | **M2RTS** | Model Name | RTD Transmitter (Plug-in type) | | **-S** | Input Type | Pt 100 (ITS-90) | | **-AD** | Power Input | Universal 100 – 240V AC / 108 – 264V DC | | **-R** | Output | 4 – 20 mA DC (Current output) | | **-N** | Options | None (Standard configuration) | --- ### 2. Key Electronic Specifications The electronic architecture is designed for high-precision signal conditioning and isolation. * **Input Section:** Specifically designed for a 3-wire Pt 100 RTD. It features burnout protection (upscale as standard) to ensure the system detects a broken wire. * **Output Section:** Provides a linear 4–20 mA signal proportional to the temperature sensed. * **Isolation:** 3-way isolation (Input to Output to Power). This prevents ground loops and protects sensitive PLC/DCS equipment from electrical surges. * **Response Time:** Usually $\leq$ 0.5 seconds (0 – 90%). --- ### 3. Connection Diagram (Internal Logic) The device is a "Plug-in" type, meaning the electronic components are housed in a module that snaps into a base socket. | Terminal No. | Function | Description | | :--- | :--- | :--- | | **1** | Output (+) | 4 – 20 mA positive lead | | **2** | Output (-) | 4 – 20 mA negative lead | | **3** | Power (L/+) | AC Live or DC Positive | | **4** | Power (N/-) | AC Neutral or DC Negative | | **5** | Input (A) | RTD Wire A | | **6** | Input (B) | RTD Wire B | | **7** | Input (B) | RTD Wire B (Sense) | --- ### 4. Technical Hardware Features * **Front Panel Adjustment:** Includes Zero and Span adjustments (trimmer potentiometers) for field calibration. * **Status Indicator:** Typically includes a Run LED to indicate power status. * **Construction:** High-durability plastic housing designed for DIN-rail or wall mounting via the base socket. ---