The **M2RTS-R-B2-R** is a specific model of an **RTD (Resistance Temperature Detector) Transmitter** within the M2 Series by M-System. This device is an ultra-slim, signal conditioner that converts a temperature signal from an RTD into a standard process signal (such as 4-20mA DC or 0-10V DC). --- ### 1. Part Number Breakdown Understanding the specific electronic configuration through its nomenclature: | Code | Component Segment | Description | | :--- | :--- | :--- | | **M2RTS** | Basic Model | RTD Transmitter (Plug-in type) | | **-R** | Input Signal | RTD (standard types like Pt 100, Pt 50, JPt 100) | | **-B** | Output Signal | 2 – 10V DC (High impedance) | | **2** | Power Input | 24V DC | | **-R** | Option | Standard (or specific manufacturing revision) | --- ### 2. Key Electronic Specifications The internal electronics are designed for precision signal conditioning and galvanic isolation. * **Input Circuitry:** Designed to interface with 3-wire RTDs. It applies a constant current to the RTD and measures the voltage drop to calculate resistance, compensating for wire length. * **Isolation:** This model features **3-way isolation**. The Input, Output, and Power circuits are electronically separated (usually up to 2000V AC), preventing ground loops and protecting PLC/DCS inputs. * **Response Time:** Typically $\leq$ 0.5 seconds (0 to 90%). * **Accuracy:** Approximately $\pm$0.2% of span. --- ### 3. Connection Diagram (Standard Pinout) The device uses a plug-in socket base (typically 8-pin or 11-pin depending on the base model). | Terminal No. | Function | Connection Type | | :--- | :--- | :--- | | **1** | Output (+) | 2 – 10V DC | | **2** | Output (-) | Common | | **3** | Power (U) | 24V DC (+) | | **4** | Power (V) | 24V DC (-) | | **5** | RTD Input (A) | Sensing Wire | | **6** | RTD Input (B) | Compensation Wire | | **7** | RTD Input (B) | Common Return | --- ### 4. Technical Features * **Zero/Span Adjustment:** Accessible via the front panel for field calibration using a small screwdriver. * **Housing Material:** Flame-resistant resin (Black). * **Mounting:** DIN rail mounting via the socket base. ---