Allen-Bradley 1785-L40C PLC-5/40C ControlNet Processor Module By wayne No Comments on Allen-Bradley 1785-L40C PLC-5/40C ControlNet Processor Module 3 Min Read Get the Allen-Bradley 1785-L40C PLC-5/40C ControlNet processor with 48K memory. It handles 2048 I/O and features hot backup support.