The Allen-Bradley 1747-L40C is an SLC 500 output module designed to be used with Allen-Bradley SLC 500 controllers to drive field devices. It provides discrete outputs that are switched under program control to connect or disconnect external circuits. Identified by the 1747-L40C designation, this module is part of the SLC 500 family and serves as the interface between the PLC and I/O on the control system.
