The **RWS1500B-48-R** is a high-power, industrial-grade AC-DC power supply manufactured by TDK-Lambda. This specific model is designed for high reliability, long life cycles, and high efficiency in demanding environments. --- ### ## Technical Specifications Overview The "48" in the part number indicates a **48V DC output**, and the "1500B" signifies a **1500W** power rating. | Feature | Specification | | :--- | :--- | | **Input Voltage** | 85 - 265 VAC (Universal Input) | | **Output Voltage** | 48V DC | | **Output Current** | 32A | | **Maximum Power** | 1536W | | **Efficiency** | ~88% at 200VAC | | **Cooling** | Internal Variable Speed Fan | | **Operating Temp** | -20°C to +70°C (Derating applies > 50°C) | --- ### ### Key Electronic Components & Functions 1. **Input Filtering & PFC (Power Factor Correction):** * Includes active PFC circuitry to ensure a high power factor (typically 0.98 at 100VAC). * Equipped with EMI/EMC filters to minimize conducted and radiated interference. 2. **Output Voltage Adjustment:** * Features a built-in potentiometer allowing the user to trim the output voltage, typically within a range of **38.4V to 52.8V**. 3. **The "-R" Suffix (Remote On/Off):** * The "R" indicates the **Remote Option**. This allows an external signal to turn the power supply output on or off without disconnecting the AC mains. 4. **Protection Circuitry:** * **Overvoltage Protection (OVP):** Shuts down the unit if the voltage exceeds a safe threshold (approx. 115-140%). * **Overcurrent Protection (OCP):** Constant current limiting with automatic recovery. * **Over-temperature Protection:** Thermal sensors shut down the unit if internal temperatures exceed safety limits. --- ### ### Physical Interface & Mounting * **Terminals:** Heavy-duty screw terminals for high-current DC output. * **Signaling:** Includes a "DC Good" signal to notify the system if the output voltage drops below a certain level. * **Dimensions:** Approximately 126.5 x 63 x 265 mm (compact for its power density). ---