The Allen-Bradley 1769-L23-QBFC1B is a CompactLogix packaged controller designed for integrated control in small to medium automation systems. It features 512 KB of user memory and two built-in RS-232 serial ports for device communication. The controller includes sixteen 24V DC digital inputs, sixteen 24V DC digital outputs, four differential or single-ended analog inputs (0–10.5V or 4–20 mA), two single-ended analog outputs (0–10V DC or 0–21 mA), and four high-speed counters for precise motion and process control. Supporting both DIN rail and panel mounting, the 1769-L23-QBFC1B offers a compact and reliable solution for distributed control applications.