The **M2RTS-R-A1D-R** is a high-precision, rack-mounted signal conditioner/transmitter, typically manufactured by **M-System** (now part of MG CO., LTD). It belongs to the M2 Series of plug-in signal conditioners. --- ## 1. Component Overview The primary function of this electronic part is to convert a specific input signal (usually from a temperature sensor or potentiometer) into an isolated DC output signal suitable for PLCs, DCS systems, or controllers. ### Model Number Breakdown | Segment | Identification | Description | | :--- | :--- | :--- | | **M2RTS** | Series Name | RTD Transmitter (Resistance Temperature Detector) | | **-R** | Power Input | 24V DC Power Supply | | **-A1** | Input Type | Pt 100 (ITS-90) RTD | | **-D** | Output Type | 4 – 20 mA DC | | **-R** | Additional Spec | Standard (or specific versioning depending on the datasheet) | --- ## 2. Technical Specifications Below are the electronic characteristics of the device: ### Input & Output * **Input (RTD):** Designed for Pt 100 (3-wire) sensors. It measures the resistance change across the sensor to determine temperature. * **Output:** 4 – 20 mA DC current loop. * **Load Resistance:** Maximum 550 $\Omega$. ### Performance * **Accuracy:** Typically ±0.1% of span. * **Isolation:** 3-way isolation (Input to Output to Power). * **Isolation Resistance:** 100 M$\Omega$ minimum at 500V DC. * **Dielectric Strength:** 2000V AC @ 1 minute (Input to Output to Power to Ground). ### Physical & Power * **Power Consumption:** Approx. 2W. * **Operating Temperature:** -5 to +55°C (23 to 131°F). * **Mounting:** Plug-in base (DIN rail or surface mount). --- ## 3. Circuit Connection Diagram The device utilizes a terminal block for wiring. Here is the standard pin assignment: ```text Pin 1: Output (+) Pin 2: Output (-) Pin 3: Power (+) 24V DC Pin 4: Power (-) 0V DC Pin 5: RTD Input (A) Pin 6: RTD Input (B) Pin 7: RTD Input (b) - Compensation wire Pin 8: Ground / NC ``` --- ## 4. Key Features 1. **Burnout Protection:** The transmitter can be configured to drive the output to a specific level (upscale or downscale) if the RTD sensor wire breaks. 2. **Linearization:** Built-in electronic linearization to ensure the output current is proportional to the temperature, not just the raw resistance. 3. **Stability:** High immunity to electromagnetic interference (EMI) and line noise, critical for industrial environments.