The **M2AC-A5D-R** is a specific model within the **M2 series** of signal conditioners manufactured by **M-System**. This device is a plug-in type alternating current (AC) input transducer designed to convert an AC current signal into a standard DC output signal. --- ### ## Technical Specifications Overview Below are the primary electronic characteristics and ratings for the M2AC-A5D-R: | Feature | Specification | | :--- | :--- | | **Input Signal** | 0 – 5A AC | | **Output Signal** | 4 – 20mA DC | | **Power Input** | 24V DC (Operational range: 24V DC ±10%) | | **Accuracy** | ±0.3% | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Isolation** | Input to output to power (2000V AC @ 1 minute) | | **Mounting** | Surface or DIN rail (Plug-in socket) | --- ### ### Component Functionality 1. **Input Section (Current Transformer):** The "A5" designation indicates a 0–5A AC input. The device typically utilizes an internal precision current transformer to step down the input current and provide initial galvanic isolation. 2. **Signal Conditioning Circuit:** The internal electronics rectify the AC signal and filter it to extract the average value (calibrated to the RMS of a sine wave). This is then amplified and linearized. 3. **Isolation Barrier:** The "R" in the model name often refers to the specific power supply or configuration requirement (in this case, 24V DC). The device maintains high-voltage isolation between the high-current input side and the low-voltage PLC/DCS output side to prevent equipment damage. 4. **Output Driver:** The output stage is a constant-current circuit capable of driving a 4–20mA loop through a maximum load resistance (typically around $550\Omega$). --- ### ### Part Number Breakdown Understanding the nomenclature helps identify the electronic capabilities: * **M2**: Series name (Mini-M series signal conditioners). * **AC**: Input type (AC Current Transmitter). * **A5**: Input Range (0 – 5A AC). * **D**: Output Range (4 – 20mA DC). * **R**: Power Supply (24V DC). --- ### ### Connection Diagram (Typical) ```text Input (L/N or K/L) --> [ M2AC-A5D-R ] --> Output (+ / -) (From CT or Line) (To PLC/Display) | Power (24V DC) ```