The **M2AC-ABA-R/CE** is a specialized electronic signal conditioner/converter manufactured by **M-System**. It is part of the M2 Series, designed for industrial instrumentation and process control. ### Product Breakdown: M2AC-ABA-R/CE | Parameter | Specification | Description | | :--- | :--- | :--- | | **Primary Function** | AC Current Transmitter | Converts an AC current input signal into a standard DC output signal. | | **Input (A)** | 0 – 1A AC | Designed to receive low-range alternating current. | | **Output (BA)** | 4 – 20mA DC | Standard process control current loop output. | | **Power Input (R)** | 24V DC | Requires a 24V direct current power supply. | | **Standards (CE)** | CE Marking | Complies with European safety, health, and environmental protection requirements. | --- ### Key Electronic Components & Features #### 1. Signal Isolation This device features **three-way isolation** between the input, output, and power supply. This is critical in industrial environments to: * Prevent ground loops. * Protect sensitive PLC/DCS equipment from high-voltage surges on the input side. * Reduce electromagnetic interference (EMI). #### 2. Input Stage (AC Sensing) * **Average Sensing:** The "A" in the model code typically denotes an "Average Sensing, RMS Calibrated" circuit. It rectifies the AC input and filters it to find the average value, then scales it to match the RMS value of a sine wave. * **Input Impedance:** It has very low input burden (approx. 0.1 VA) to ensure it doesn't drop significant voltage in the sensing loop. #### 3. Output Stage * **Current Loop Drive:** The 4-20mA output is capable of driving loads up to 550 $\Omega$. * **Zero/Span Adjustments:** Located on the front panel, these allow for fine-tuning the electronic calibration without removing the unit from the rail. #### 4. Physical Construction * **Terminal Block:** M3 screw terminals. * **Housing:** Flame-resistant resin (black). * **Mounting:** Standard DIN rail mounting. --- ### Technical Specifications Summary * **Accuracy:** ±0.3% of span. * **Response Time:** $\le$ 0.5 seconds (0 – 90%). * **Insulation Resistance:** 100 M$\Omega$ minimum at 500V DC. * **Dielectric Strength:** 2000V AC @ 1 minute (Input to Output to Power to Ground). * **Operational Temperature:** -5 to +55°C (23 to 131°F).