Allen-Bradley 1756-L83E ControlLogix 5580 Controllers. Allen-Bradley 1756-L83E is listed in Rockwell Automation's public Product Catalog under ControlLogix 5580 Controllers. Rockwell's exact Configurator record describes it as ControlLogix 5580 Controller with 10 MB User Memory, USB Port, 1 gigabit (Gb) Ethernet port, 250 EtherNet/IP Devices, 4 Character Alpha/Numeric Display.. Buyers should confirm project-specific configuration before ordering, including network topology, firmware, environmental rating, power requirements and accessory compatibility.