The **M2AC-A1Z-R2/CE** is a high-performance **Signal Conditioner (Transducer)** manufactured by **M-System**. It is specifically designed to convert an Alternating Current (AC) input into a standard DC output signal, providing electrical isolation between the input, output, and power supply. Below is the breakdown of its electronic specifications and features. --- ## 1. Technical Specifications | Feature | Specification | | :--- | :--- | | **Model Series** | M2 Series (Plug-in Signal Conditioners) | | **Input Signal** | 0 – 1 A AC (Standard configuration for -A1) | | **Output Signal** | 4 – 20 mA DC (Standard for -Z) | | **Power Input** | 100 – 240 V AC (Indicated by -R2) | | **Accuracy** | ±0.3% of span | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Isolation** | 3-way isolation (Input to output to power) | | **Certification** | CE Marking (Indicated by /CE) | --- ## 2. Model Breakdown (Nomenclature) * **M2AC**: Model name for an **AC Current Transmitter**. * **A1**: Input Code. Typically represents **0 – 1 A AC**. * **Z**: Output Code. Represents a **4 – 20 mA DC** current loop output. * **R2**: Power Supply Code. Indicates a wide-range AC power input (**100 – 240 V AC**, 50/60 Hz). * **CE**: Confirms the device meets European Safety Standards (EMC and Low Voltage Directives). --- ## 3. Standard Electronic Logic & Wiring The device operates on a linear transformation logic: $I_{out} = f(I_{in})$. While the input is an alternating waveform, the internal circuitry rectifies and filters the signal to provide a smooth, proportional DC output. ### Terminal Connections (Typical) | Terminal | Function | Description | | :--- | :--- | :--- | | **1 - 2** | Input | Connects to the Current Transformer (CT) secondary | | **4 - 5** | Output | Connects to PLC/Controller (4-20mA) | | **7 - 8** | Power | 100-240V AC Mains | --- ## 4. Key Electronic Features ### A. 2000V AC Isolation The unit provides a dielectric strength of 2000V AC for one minute between the input, output, and power terminals. This protects sensitive PLC/DCS equipment from high-voltage surges or ground loops on the AC line. ### B. Overload Resistance The input circuit is designed to handle temporary surges (typically up to 20 times the rated current for 1 second), which is critical when monitoring motor starts. ### C. Frequency Response It is designed to accurately process AC signals within the 40 Hz to 1 kHz range, making it suitable for both 50Hz and 60Hz power grids. ---