The **M2MS-B-R2/Q** is a specific industrial-grade signal conditioner or transducer, typically associated with the **M-System** (now MG CO., LTD) M2 Series. These devices are designed to convert or isolate various analog signals in automation and process control environments. ### 1. Model Breakdown (Nomenclature) The suffix and model codes for the M2 Series generally follow this logic: | Code Segment | Meaning | Specification Details | | :--- | :--- | :--- | | **M2MS** | Base Model | Mini-M Series Signal Transmitter / Isolator | | **-B** | Input Type | 4 – 20 mA DC (Standard current input) | | **-R2** | Power Input | 100 – 240 V AC (Wide range power supply) | | **/Q** | Option | Custom/Special specification (requires checking the manual) | --- ### 2. Key Electronic Specifications The internal electronics are designed for high precision and electrical isolation. * **Isolation Structure:** 3-way isolation (Input to Output to Power). This prevents ground loops and protects sensitive control equipment from surges. * **Input Impedance:** For the "B" (4-20mA) model, the internal shunt resistor is typically **250 Ω**. * **Output Signal:** Usually provides a standard 4–20 mA or 1–5 V DC output (depending on the secondary code). * **Response Time:** Typically **≤ 0.5 seconds** (0 to 90%). * **Accuracy:** Within **±0.1%** of the span. --- ### 3. Physical & Connection Parts The unit is a plug-in type, allowing for easy maintenance without disconnecting wires from the base. 1. **Terminal Block (Base):** Screw terminals for wiring power, input, and output. 2. **DIN Rail Socket:** The unit snaps into a standard 35mm DIN rail. 3. **Front Indicators:** Usually features a **Power LED** (Green) to indicate operational status. 4. **Zero/Span Adjustments:** Potentiometers located behind the front cover for fine-tuning the calibration. --- ### 4. Meaning of the "/Q" Suffix In M-System products, the **/Q** suffix indicates a "Special Specification." The exact nature of the change is documented on a separate sheet provided with the unit, but it often refers to: * **Conformal Coating:** Protection against moisture and dust (Suffix: /C). * **Fast Response:** Specialized circuit timing. * **Custom Calibration:** Pre-set to specific non-standard ranges. * **Specific Labeling:** Tag numbers etched or printed as per customer requirement. --- ### 5. Wiring Diagram Overview Standard wiring for the R2 (AC power) version: | Terminal | Function | | :--- | :--- | | **1 & 2** | Output (+) and (-) | | **4 & 5** | Input (+) and (-) | | **7 & 8** | Power Supply (L & N) |