Both DC screens and UPS power supplies are used to ensure power supply, but they differ significantly.
First, their output power types are different. A DC screen outputs direct current (DC), while a UPS outputs alternating current (AC).
DC screens are generally used in power plants, substations, and beside automated control equipment in factories.
UPS systems, on the other hand, are used in data centers, computer rooms, as well as medical equipment in hospitals and banking systems.
A DC screen is mainly composed of a rectifier, a battery bank, and power distribution components; in addition to a rectifier and a battery bank, a UPS is also equipped with an inverter and a control system.
The main function of a DC screen is to provide stable power for DC-powered equipment. When the mains power is cut off, the battery bank takes over the power supply.
The main function of a UPS is to provide uninterrupted power for AC-powered equipment to prevent power outages.
Finally, their working principles differ. A DC screen first converts AC power into DC power and stores it in the battery bank. If there is a problem with the mains power, the battery bank directly supplies power.
Under normal circumstances, a UPS also converts AC power into DC power for storage. Once the mains power is cut off, the inverter will convert the DC power in the battery bank into AC power to supply the equipment.