Mean Well DUPS20 – 24 V / 20 A DC-UPS Module for DIN Rail

Mean Well DUPS20 is a DC-UPS (Uninterruptible DC Power Supply) module for DIN rail mounting, designed to provide backup power for 24 V DC systems. It is not a standalone power supply unit — it must be combined with a standard 24 V DC power supply and an external battery to perform the UPS function.

In practice, this means that in the event of a mains power failure, the device automatically switches the load to the battery, ensuring stable and uninterrupted operation. It supports an output current of up to 20 A, charges batteries with a capacity of 4 Ah–135 Ah, and is easily mounted on a standard DIN rail (TS35). With a width of only 40 mm and protection against reverse polarity, short circuit, and overvoltage, this UPS module ensures safe and reliable power supply in critical situations.

Protections / Features: Protection against battery reverse polarity, short circuit, overvoltage, undervoltage; automatic switchover upon power failure; LED indicators for status (DC BUS OK, battery, emergency mode).