The DUPS20 is a 20A DIN rail DC-UPS module that pairs with a power supply and an external battery to ensure continuous operation of a system. It is suitable for 24V systems, supporting a rated current of up to 20A and providing a 2A charging current for lead-acid batteries with capacities from 4AH to 135AH. The module features complete diagnostic and monitoring functions with LED indicators and relay contacts for DC BUS OK, battery discharge, and battery failure signals. Key protections include battery reverse polarity, short circuit, and over-discharge current, with cooling managed by free air convection, all within a compact 40mm width. This makes the DUPS20 ideal for use in industrial control systems, security systems, factory automation, and central monitoring systems.