Allen-Bradley 1785-L40C15 PLC5 ControlNet Processor By wayne No Comments on Allen-Bradley 1785-L40C15 PLC5 ControlNet Processor 4 Min Read The Allen-Bradley 1785-L40C15 is a ControlNet PLC5 controller with 48K words memory and 2048 I/O. It features dual ControlNet ports for robust industrial automation.