The **RWS1000B-48-RFO** is a high-performance, industrial-grade AC-DC power supply manufactured by TDK-Lambda. This specific model belongs to the RWS-B series, which focuses on high reliability and a compact footprint. --- ### 1. Technical Specifications Overview Below are the primary electrical characteristics of the RWS1000B-48-RFO: | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 85 - 265 VAC (Universal Input) | | **Output Voltage** | 48 VDC | | **Maximum Output Current** | 21 A | | **Maximum Power Output** | 1008 W | | **Efficiency (Typical)** | 88% | | **Cooling** | Internal Fan Cooling | | **Operating Temperature** | -20°C to +70°C | --- ### 2. Suffix Meaning (-RFO) The alphanumeric suffix indicates specific hardware configurations and features: * **-RF:** Refers to the "Remote On/Off" and "Fan Supply" capability. * **-O:** Typically indicates a specific connector or coating option depending on the regional manufacturing standard (often related to "Open frame style" internal logic or specific signal pins). --- ### 3. Key Electronic Components & Features #### A. Internal Filtering and Protection * **EMI/EMC Filter:** Includes high-quality capacitors and common-mode chokes to comply with EN55011/EN55022-B standards. * **PFC (Power Factor Correction):** Features active PFC circuitry to ensure high efficiency and low harmonic distortion. * **Overvoltage Protection (OVP):** Inverter shuts down if the output exceeds approximately 115-140% of the nominal voltage. * **Overcurrent Protection (OCP):** Constant current limiting with automatic recovery. #### B. Control Signals * **Remote On/Off:** Allows the unit to be toggled electronically without breaking the main AC line. * **DC Good Signal:** An isolated signal that monitors whether the output voltage is within a functional range. #### C. Build Quality * **Electrolytic Capacitors:** TDK-Lambda uses long-life capacitors to ensure a high Mean Time Between Failures (MTBF). * **Double-Sided PCB:** Provides better structural integrity and heat dissipation compared to cheaper single-sided boards. --- ### 4. Connection Interface The unit uses heavy-duty screw terminals for high-current delivery: ```markdown Terminal Block Layout: 1. AC (L) - Line 2. AC (N) - Neutral 3. FG - Frame Ground 4. -V - Negative DC Output 5. +V - Positive DC Output 6. CN - Signal Connector (Remote Sense, On/Off, DC Good) ```