The **M2UDS2-155W-R2** is a high-performance **Industrial Power Supply Unit (PSU)**, typically utilized in server environments, networking equipment, and industrial computing racks. It is characterized by its slim form factor and high efficiency. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the module: | Parameter | Specification | | :--- | :--- | | **Type** | AC/DC Switching Power Supply | | **Input Voltage** | 90V – 264V AC (Universal Input) | | **Frequency Range** | 47Hz – 63Hz | | **Output Power** | 155 Watts | | **Form Factor** | 1U / Slim Industrial | | **Efficiency** | Often 80 Plus rated (High Efficiency) | --- ### 2. Core Electronic Components & Features The internal circuitry of the M2UDS2-155W-R2 is composed of several critical stages: #### A. Input Protection & Filtering (EMI/PFC) * **EMI Filter:** Includes X and Y capacitors and common-mode chokes to prevent electromagnetic interference from leaking back into the grid. * **Active PFC (Power Factor Correction):** Utilizes an inductor and controller to ensure the power factor is close to 1.0, reducing reactive power loss. #### B. Switching Topology * **PWM Controller:** A Pulse Width Modulation integrated circuit manages the high-speed switching of MOSFETs. * **Main Transformer:** A high-frequency ferrite core transformer that provides galvanic isolation between the AC input and DC output. #### C. Output Rectification & Regulation * **Schottky Rectifiers:** High-speed diodes (or synchronous rectification MOSFETs) convert the AC signal from the transformer back to DC. * **Filter Capacitors:** High-quality electrolytic capacitors (often rated for 105°C) to smooth out voltage ripple. --- ### 3. Integrated Protection Circuitry The unit includes an **Integrated Circuit (IC)** supervisor that monitors the following conditions to prevent hardware damage: 1. **OVP (Over Voltage Protection):** Shuts down if output voltage exceeds safety thresholds. 2. **OCP (Over Current Protection):** Prevents damage during a short circuit or current spike. 3. **OTP (Over Temperature Protection):** Thermal sensors trigger a shutdown if the internal heatsinks become too hot. 4. **SCP (Short Circuit Protection):** Latches the power supply off if a direct short is detected. --- ### 4. Connection Interface This specific model usually features a specialized output header: * **Main Connector:** Often a high-density 20-pin or 24-pin connector. * **Additional Rails:** Provides +12V, +5V, and +3.3V rails to the motherboard or backplane.