The **HSP-24-R** is a high-performance, single-output power supply manufactured by **MEAN WELL**. It is specifically designed for applications requiring high efficiency, a low profile, and high current stability, such as LED signage and moving signs. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Input Voltage Range** | 90 ~ 264VAC (Universal) / 127 ~ 370VDC | | **Output Voltage** | 4.2V DC (Standard) | | **Rated Current** | 60A | | **Rated Power** | 252W | | **Efficiency** | ~85% | | **Dimensions** | 210 x 62 x 32 mm (L x W x H) | | **Cooling** | Built-in DC fan (Forced air cooling) | --- ### 2. Core Electronic Features #### A. Power Factor Correction (PFC) The unit features built-in **Active PFC (Power Factor Correction)**. This ensures high energy efficiency and reduces the harmonic current distortion, complying with EN61000-3-2 regulations. #### B. Circuit Protections The internal control circuitry includes several safety mechanisms to prevent damage to the power supply or the connected load: * **Short Circuit Protection:** Automatically shuts down or limits current during a short. * **Overload Protection:** Limits output power when current exceeds approximately 105%–135% of the rating. * **Overvoltage Protection:** Shuts down the output if the voltage spikes above a safe threshold. * **Over-temperature Protection:** The unit will shut down if internal temperatures exceed safe operating limits. #### C. Conformal Coating The PCB (Printed Circuit Board) is typically treated with a **conformal coating**. This provides the electronic components with protection against: * Moisture and humidity. * Dust and pollutants. * Corrosion in outdoor or industrial environments. --- ### 3. Component Layout and Design * **Low Profile (32mm):** Designed for "1U" height installations, making it ideal for thin cabinet designs. * **Terminal Blocks:** Uses high-current screw terminals to accommodate the 60A output. * **LED Indicator:** A green LED on the chassis indicates the "DC OK" status for easy troubleshooting. --- ### 4. Comparison with Standard PSUs | Feature | HSP-24-R | Standard Industrial PSU | |:---|:---|:---| | **Voltage Focus** | Low voltage (4.2V) / High current | Standard 12V/24V | | **Environment** | Humid/Dusty (Coated) | Standard Indoor | | **Form Factor** | Slim (32mm) | Standard (50mm+) | ---