The Allen-Bradley 1769-L16ER-BB1B is a CompactLogix 5370 programmable logic controller (PLC) designed for smaller-scale industrial automation applications. It features dual Ethernet ports with Device Level Ring (DLR) capability for network redundancy and supports up to 4 Ethernet/IP nodes. This controller also includes 16 sinking digital inputs and 16 sourcing digital outputs, and can be expanded with up to six 1734 POINT I/O modules.