The **M2AC-AC5W-R/CE** is a high-performance **M2AC Series Isolation Transmitter** (Signal Conditioner) manufactured by **M-System**. It is designed to convert an AC current input signal into a standard DC output signal, providing galvanic isolation between the input, output, and power supply. --- ### ## Technical Specifications The following table outlines the primary electronic characteristics of the M2AC-AC5W-R/CE: | Parameter | Specification | | :--- | :--- | | **Model Series** | M2AC (Mini-M Series) | | **Input Type** | AC Current (Clamp-on current sensor) | | **Output Type** | 4 – 20 mA DC | | **Power Input (R)** | 24V DC | | **CE Marking** | Yes (Compliant with EU standards) | | **Accuracy** | ±0.3% of span | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Isolation** | 3-way isolation (Input to Output to Power) | | **Dielectric Strength** | 2000V AC @ 1 minute | --- ### ### Key Electronic Components & Functions 1. **Input Circuit (AC Sensing):** * This specific model is designed to work with a **Clamp-on Current Sensor** (hence the "5W" designation, often associated with specific sensor ranges). It rectifies and filters the AC sine wave into a proportional DC level. 2. **Isolation Barrier:** * Uses optical or magnetic coupling to ensure that high-voltage spikes or ground loops on the input side do not damage sensitive PLC/DCS equipment on the output side. 3. **Signal Conversion (Conditioning):** * The internal circuitry linearizes the signal. The "W" in the model code typically indicates a **True RMS** sensing capability, meaning it can accurately measure distorted waveforms, not just pure sine waves. 4. **Output Driver:** * A regulated current source that maintains a constant 4-20mA loop despite variations in load resistance (up to 750 $\Omega$). --- ### ### Terminal Assignment The device features a plug-in socket base for easy maintenance. * **Input Terminals:** Connected to the CT (Current Transformer) or Clamp sensor. * **Output Terminals:** Connected to the controller (PLC/DCS). * **Power Terminals:** Dedicated 24V DC input. ---