The **M2AMS2-B4-R2/CE** is a specific model within the **M2 Series** of Signal Conditioners (Transmitters) manufactured by **M-System**. This device is a high-performance, plug-in type signal converter designed to convert DC input signals into isolated standard process signals. --- ### 1. Model Code Breakdown The model number can be deciphered as follows: | Code Segment | Description | Details | | :--- | :--- | :--- | | **M2AMS2** | Base Model | Ultra-slim Signal Conditioner (Transmitter) | | **B4** | Input Signal | 4 to 20 mA DC | | **R** | Output Signal | 4 to 20 mA DC (Current output) | | **2** | Power Supply | 24V DC | | **CE** | Certification | CE Marking compliant | --- ### 2. Key Electronic Specifications The electronic architecture of this unit focuses on high-speed response and signal isolation. * **Input Impedance:** Approximately 250 $\Omega$ for the 4-20mA input range. * **Output Load Resistance:** Maximum 750 $\Omega$ (allowing for long cable runs). * **Response Time:** $\leq$ 0.5 seconds (0 – 90%). * **Accuracy:** $\pm$0.1% of span. * **Isolation:** 3-way isolation (Input to Output to Power). * **Dielectric Strength:** 2000V AC @ 1 minute. --- ### 3. Connection Diagram (General) The unit uses a plug-in base (socket) for easy maintenance without disturbing field wiring. ```text Terminal | Function ---------|---------- 1 | Output (+) 2 | Output (-) 4 | Input (+) 5 | Input (-) 7 | Power (24V DC +) 8 | Power (24V DC -) ``` --- ### 4. Electronic Features 1. **Galvanic Isolation:** Uses internal transformers or opto-isolators to break ground loops, preventing electrical noise from affecting the control system (PLC/DCS). 2. **Surge Protection:** Built-in surge absorbers to protect internal circuitry from voltage spikes. 3. **Zero/Span Adjustment:** Front-accessible multi-turn potentiometers allow for fine-tuning the calibration of the electronic output. 4. **Low Heat Generation:** Designed with efficient power conversion to allow high-density mounting in DIN rail racks. ---