The Allen-Bradley 2080-OB4 is a digital output plug-in module designed for the Micro800 series of programmable logic controllers (PLCs). This compact and cost-effective module provides four 24V DC sourcing output points, allowing for flexible expansion of control capabilities in smaller applications. Its plug-in design ensures easy installation and integration with Micro820, Micro830, Micro850, and Micro870 controllers, making it an ideal choice for adding discrete outputs to control devices like relays, indicators, and solenoids without requiring additional panel space.