The part number **M2AC-AA3-R2/CE** refers to a high-performance **M2 Series Signal Conditioner** manufactured by **M-System** (now part of MG CO., LTD). These devices are used in industrial automation to convert, isolate, and transmit analog signals. Below is a breakdown of the electronic specifications and features based on the model code. --- ### 1. Part Number Breakdown The alphanumeric code specifies the hardware configuration of the module: | Code Segment | Description | Specific Value | | :--- | :--- | :--- | | **M2AC** | **Model Series** | AC Input Signal Conditioner | | **A** | **Input** | 0 – 1 A AC | | **A** | **Output** | 4 – 20 mA DC | | **3** | **Power Input** | 24V DC | | **R2** | **Version/Refinement** | Revised design (standard version 2) | | **CE** | **Certification** | CE Marking (European Conformity) | --- ### 2. Technical Specifications The electronics of this unit are designed for high dielectric strength and signal precision. | Feature | Specification | | :--- | :--- | | **Input Impedance** | Approx. 0.1 Ω (Input A) | | **Output Load Resistance** | 750 Ω maximum | | **Accuracy** | ±0.3% of span | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Isolation** | 4-way isolation (input to output to power to ground) | | **Dielectric Strength** | 2000V AC @ 1 minute | | **Mounting** | DIN Rail / Surface mount | --- ### 3. Key Electronic Components & Functions * **Isolation Barrier:** Uses optical or magnetic coupling to ensure that high-voltage AC inputs do not damage low-voltage PLC/DCS control systems. * **AC/DC RMS Converter:** The internal circuitry processes the AC input (Current) and converts it into a stable, linearized DC current output. * **Zero/Span Adjustments:** Located on the front panel, these potentiometers allow for fine-tuning the electronic calibration of the output signal. * **Status Indicator:** Typically includes a power LED to indicate the health of the internal 24V DC power supply circuit. --- ### 4. Typical Wiring Diagram Logic To integrate this part, the wiring follows this general internal routing: 1. **Terminals 1 & 2:** AC Current Input (from a Current Transformer or direct line). 2. **Terminals 4 & 5:** DC Output (to a PLC or Controller). 3. **Terminals 7 & 8:** 24V DC Power Supply.