The Allen-Bradley 1751-SLBA/A is a BASIC Language Module designed for use with the SLC 100 and SLC 150 programmable controllers. This module enhances the functionality of the base controller by allowing users to create and execute custom programs written in the BASIC language. It operates in parallel with the controller’s ladder logic program, making it ideal for tasks that are difficult to implement in ladder logic, such as complex mathematical calculations, data logging, report generation, and communication with ASCII devices like printers, terminals, or barcode readers. The module includes its own memory and a dedicated communication port, providing a powerful and flexible solution for expanding the capabilities of legacy SLC automation systems.