The **M2AC-AD4-R/Q** is an analog input signal conditioner (transmitter) from the **M2 Series** manufactured by **M-System**. This specific model is designed to convert AC voltage or current signals into standard DC process signals. --- ### 1. Model Breakdown The model number specifies the exact electrical characteristics of the unit: | Code Segment | Description | Specific Detail | |:---|:---|:---| | **M2AC** | Base Model | AC Input Signal Conditioner | | **AD4** | Input Type | AC Current/Voltage (Field Configurable) | | **R** | Power Input | 24V DC | | **Q** | Options | Special specification (often refers to specific coating or certifications) | --- ### 2. Key Electronic Components & Features #### A. Input Circuitry * **AC RMS Conversion:** The device utilizes internal circuitry to calculate the **Root Mean Square (RMS)** value of the input waveform. This ensures accuracy even if the input AC signal is distorted. * **Frequency Range:** Typically handles 40 Hz to 1 kHz. * **Input Impedance:** High impedance for voltage inputs to prevent loading the source; low resistance shunts for current inputs. #### B. Isolation Barrier * **Three-Way Isolation:** The unit provides electronic isolation between the **Input**, **Output**, and **Power Supply**. * **Dielectric Strength:** Usually rated for 2000V AC @ 1 minute, protecting sensitive PLC/DCS cards from surges on the AC line. #### C. Output Stage * **DC Output:** Converts the AC signal into a linear DC output (e.g., 4–20mA, 0–10V). * **Adjustments:** Includes front-mounted Zero and Span potentiometers for fine-tuning the calibration. --- ### 3. Technical Specifications | Parameter | Specification | |:---|:---| | **Power Consumption** | Approx. 2W | | **Response Time** | ≤ 0.5 seconds (0 – 90%) | | **Accuracy** | ±0.3% of span | | **Mounting** | DIN rail (Plug-in base) | | **Housing Material** | Flame-resistant resin (Black) | --- ### 4. Wiring Diagram (Conceptual) The unit uses a plug-in base (often the M2-type socket). ```text Input (AC) Power (DC) Output (DC) [1] L [7] +24V [4] + [2] N [8] GND [5] - ``` --- ### 5. Application Use-Case This part is commonly used in industrial environments to monitor: * **Motor Current:** Converting current transformer (CT) outputs to 4-20mA for a PLC. * **Line Voltage:** Monitoring utility power fluctuations. * **Power Consumption:** Sending AC load data to an energy management system. ---