The **M2AC-AZB-R** is a specific electronic component within the **M2 series** of signal conditioners manufactured by **M-System** (now part of MG CO., LTD). It is a plug-in type signal conditioner designed to accept an AC voltage input and convert it into a standard DC output. --- ### 1. Part Number Breakdown To understand the electronic capabilities, we must decode the suffix codes: | Code Segment | Meaning | Specification | |:---|:---|:---| | **M2AC** | Model Series | AC Transmitter (Average sensing, RMS calibrated) | | **-A** | Input Range | 0 – 100V AC | | **-Z** | Output Range | Special Output (Custom/Non-standard) or Specified range | | **-B** | Power Input | 100V AC | | **-R** | Options | Standard RoHS compliant/Specific housing details | --- ### 2. Key Technical Specifications The device acts as an interface between high-voltage power monitoring and low-voltage control systems (like a PLC or SCADA). * **Input Frequency:** 50 or 60 Hz. * **Accuracy:** ±0.3% of span. * **Response Time:** Approx. 0.5 seconds (0 – 90%). * **Isolation:** 4-way isolation (Input to Output to Power to Ground). * **Dielectric Strength:** 2000V AC @ 1 minute. * **Housing Material:** Flame-resistant resin (Black). --- ### 3. Electronic Architecture The internal circuitry typically consists of three primary stages: #### A. Input Conditioning (The "Front End") The AC voltage (0-100V) enters through a step-down transformer or a precision resistor network. Since it is an **average-sensing** model, it rectifies the AC signal and filters it to find the average value, which is then scaled to represent the RMS value of a sine wave. #### B. Isolation Barrier To protect the sensitive DC side from high-voltage transients on the AC side, the device uses **Optical Isolation** or **Transformer Isolation**. This prevents ground loops and ensures safety for the connected PLC/Controller. #### C. Output Scaling (The "Back End") The DC signal is amplified and converted into the specific "Z" range (which is often a customized voltage or current signal, e.g., 0-5V or 4-20mA). --- ### 4. Connection Diagram (Simplified) Below is a typical pin-out representation for the M2 series base: | Pin No. | Function | Description | |:---:|:---|:---| | 1 | Output (+) | Positive DC Signal | | 2 | Output (-) | Negative DC Signal | | 4 | Power (U) | 100V AC Power Supply | | 5 | Power (V) | 100V AC Power Supply | | 7 | Input (U) | AC Voltage Input (+) | | 8 | Input (V) | AC Voltage Input (-) | ---