The Allen-Bradley 1747-L541 SLC 5/04 CPU Module is a Series C central processing unit for the SLC 500 modular controller family and provides 16K words of user memory. It includes built-in Data Highway Plus (DH+) and RS-232 serial communication ports for programming, monitoring, and exchange with DH+ devices. Rockwell Automation lists this model as discontinued as of December 31, 2021. It is commonly used to control small- to mid-size automation tasks on manufacturing lines and machines when paired with compatible 1747 I/O modules.
