The **R1MX55-AB5-R** is a specific industrial-grade component, typically associated with the **R1MX series** of high-density, rack-mounted power supplies or server-grade computing modules. These parts are engineered for redundant power systems and high-availability environments. --- ### 1. Component Overview This part is a **Redundant Power Supply Module**. It is designed to be hot-swappable, meaning it can be replaced without shutting down the system. | Specification | Description | | :--- | :--- | | **Model Number** | R1MX55-AB5-R | | **Form Factor** | 1U Redundant / Slim Power Module | | **Wattage** | 550W (Standard for this series) | | **Efficiency Rating** | 80 PLUS Platinum or Gold (depending on revision) | | **Input Type** | AC 100-240V Universal Input | --- ### 2. Key Electronic Features #### A. Power Conversion and Regulation * **PFC (Power Factor Correction):** Includes Active PFC (typically >0.95) to ensure high efficiency and minimal harmonic distortion on the power grid. * **DC-DC Converter Design:** Uses high-frequency switching to convert AC input into stable +12V, +5V, and +3.3V rails for server motherboards. #### B. Protection Circuitry The module contains several integrated protection layers to prevent damage to the connected hardware: * **OVP (Over Voltage Protection):** Shuts down the unit if output voltage exceeds safety limits. * **OCP (Over Current Protection):** Limits current to prevent overheating. * **SCP (Short Circuit Protection):** Instantaneous shutdown in the event of a short. * **OTP (Over Temperature Protection):** Monitors internal thermistors and ramps up fan speed or shuts down if thresholds are breached. #### C. Communication & Monitoring * **PMBus 1.2 Support:** It uses the Power Management Bus (I2C-based) to communicate with the system's BMC (Baseboard Management Controller). This allows real-time monitoring of: * Fan speed (RPM) * Internal temperature * Current wattage draw * Input voltage status --- ### 3. Physical Interface The "R" suffix usually denotes **Rear-exhaust** or a specific **Revision** for rack-mount compatibility. * **Connector:** Gold-finger PCB edge connector (standard for modular redundant bays). * **Cooling:** Dual or single high-static pressure 40mm fans. * **LED Indicators:** * *Solid Green:* Normal Operation. * *Blinking Amber/Red:* Power failure or fan fault. ---