Allen-Bradley Micro800 Plug-in Modules provide a cost-effective way to expand the functionality of Micro810, Micro820, Micro830, Micro850, and Micro870 controllers. These compact modules plug directly into the controller and include options for analog I/O, digital I/O, communication ports (RS232/485), and specialty functions like RTC, high-speed counters, and backup memory. Designed to reduce panel space and wiring complexity, they offer quick customization for small standalone machines.