Allen-Bradley 1785-L40E PLC-5/40E Ethernet Controller By wayne No Comments on Allen-Bradley 1785-L40E PLC-5/40E Ethernet Controller 2 Min Read The Allen-Bradley 1785-L40E PLC-5 controller offers 48K words of memory, EtherNet/IP, and DH+ connectivity. It supports 2048 I/O points and a 3ms remote I/O scan time.