What type of controller is the 1769-L23 CompactLogix?

The 1769-L23 CompactLogix is classified as a fixed or packaged controller. This type of controller integrates the processor and I/O within a single assembly or unit, providing a compact solution for control applications. The inherent design allows for a reduced footprint and easier installation, making it suitable for a wide range of automation tasks, especially in environments where space is at a premium.

Fixed controllers typically have a predetermined number of inputs and outputs that cannot be changed or expanded, although the CompactLogix series supports additional I/O modules through expansion slots for greater flexibility while retaining the characteristics of a fixed configuration. This integration streamlines communication and processing, which is advantageous for many applications in manufacturing and process control.

In contrast to the other types listed, such as modular, distributed, and standalone controllers, the fixed or packaged controller provides simplicity and efficiency in service and maintenance, which is particularly beneficial in many automated systems.