The Allen-Bradley 1769-L24ER-QB1B is a CompactLogix 5370 L2 controller engineered for small to medium automation systems, featuring 32 DC I/O channels, split evenly between inputs and outputs, operating at a nominal 24V DC. This efficient PLC incorporates integrated Ethernet ports supporting Device Level Ring (DLR) topology, as well as USB and RS232 ports, enhancing connectivity and communication. It boasts a 0.75 MB expandable memory, powered by 24V DC with an isolated power supply, making it ideal for sophisticated control tasks with a compact footprint of 4.53 x 4.13 x 4.65 inches.