The **M2AMS2-BC-R/CE** is a high-performance, universal signal conditioner and transmitter manufactured by **M-System**. It is designed to convert various industrial input signals into a standard DC output with galvanic isolation. --- ## 1. Core Technical Specifications | Feature | Specification | | :--- | :--- | | **Model Series** | M2AMS (Plug-in type) | | **Input Signal** | Universal (DC Voltage, Current, Thermocouple, RTD, Potentiometer) | | **Power Input** | 100 – 240V AC | | **Output Type** | 4 – 20 mA DC (Current) | | **Configuration** | PC programmable or via front buttons | | **Isolation** | 3-way (Input - Output - Power) | --- ## 2. Breakdown of the Part Number The suffix codes provide specific information about the electronic configuration of this unit: * **M2AMS2**: The base model series indicating a universal input transmitter with a digital display. * **-B**: Power Input code (100 – 240V AC). * **-C**: Output code (4 – 20 mA DC). * **-R**: Selection code for specialized options (often related to standard factory settings or specific certifications). * **-CE**: Conformité Européenne (CE) marking, indicating compliance with EU safety, health, and environmental requirements. --- ## 3. Electronic Components and Architecture ### A. Front Panel Interface The device features a **4-digit LED display** and three operation buttons. This allows for: * Real-time monitoring of the input/output percentage. * On-site calibration without the need for an external PC. ### B. Input Stage (Universal) The electronic input circuit is highly flexible. It uses high-precision A/D converters to process: * **Current:** 0–20 mA. * **Voltage:** -10 to +10V DC. * **Temperature:** Various T/C types (K, E, J, T, B, R, S, N) and RTD (Pt100). ### C. Isolation Barrier One of the most critical electronic features is the **2000V AC isolation**. It utilizes opto-couplers or transformers to separate the input, output, and power circuits. This protects downstream PLCs or SCADA systems from ground loops and electrical surges. ### D. Signal Processing (MCU) The "brain" is a microprocessor that handles: * **Linearization:** Correcting non-linear signals from thermocouples. * **Digital Filtering:** Removing electronic noise from the input signal. * **Cold Junction Compensation:** Built-in sensor to adjust for ambient temperature changes at terminal connections. --- ## 4. Wiring Diagram Overview | Terminal No. | Function | | :--- | :--- | | **1 & 2** | Output (+) and (-) | | **4 & 5** | Power Input (L, N) | | **7, 8, 9** | Input Terminals (Variable based on sensor type) |