The **M2AC-A8F-R2/CE** is a specific model of an **M2 Series signal conditioner** (plug-in type) manufactured by **M-System** (now MG CO., LTD). This device is primarily used in industrial automation to convert or isolate analog signals. --- ## 1. Technical Specifications Overview The part number breaks down into specific electronic characteristics and capabilities: | Component | Specification | Description | | :--- | :--- | :--- | | **Model Series** | M2AC | AC Input Signal Conditioner | | **Input** | A | AC Current (0 – 1 A AC) | | **Output** | 8 | Current Output (4 – 20 mA DC) | | **Power Input** | F | 120V AC | | **Option** | R2 | RoHS compliant / Specific mounting | | **Compliance** | CE | European Conformity (EMC and Low Voltage Directive) | --- ## 2. Key Electronic Features ### A. Signal Conversion (AC to DC) The primary electronic function of this module is to take an **Alternating Current (AC)** input (typically from a Current Transformer) and convert it into a linearized **Direct Current (DC)** signal suitable for a PLC or DCS input. * **Input Frequency:** Usually ranges between 40 Hz and 1 kHz. * **Isolation:** Provides 2000V AC isolation between input, output, and power supply. ### B. Output Characteristics The "8" designation indicates a standard industrial loop: * **Output Signal:** 4 – 20 mA DC. * **Load Resistance:** Capable of driving up to 750 $\Omega$. ### C. Construction & Power * **Plug-in Design:** The electronics are housed in a module that plugs into a base socket, allowing for "hot-swapping" or easy maintenance without rewiring. * **Power Consumption:** Approximately 3 VA at 120V AC. * **Zero/Span Adjustments:** Accessible on the front panel to calibrate the electronics for precise accuracy (typically $\pm$0.3%). --- ## 3. Wiring Configuration The device uses a standard terminal base. The typical electronic pinout for the M2 series is: ```markdown Terminal | Function ---------|---------- 1 | Output (+) 2 | Output (-) 4 | Input (U) 5 | Input (V) 7 | Power (L) 8 | Power (N) ``` --- ## 4. Application Use Case In an industrial environment, the **M2AC-A8F-R2/CE** is used to monitor large AC motors. It takes the high-amperage current (scaled down via a transformer to 0-1A), isolates it to prevent electrical noise from damaging the controller, and provides a clean 4-20mA signal to the control room.