Allen-Bradley 2711-M3A18L1 PanelView 300 Micro HMI

The Allen-Bradley 2711-M3A18L1 PanelView 300 Micro HMI is a compact 3-inch operator terminal designed to provide a local, hard-wired human–machine interface for Rockwell Automation PLCs. It offers keypad input and a dedicated 3-inch display, with an RS-232 9-pin port that communicates to controllers using DF1 Full Duplex (this model is the RS-232/DF1 variant; the 2711-M3A19L1 uses DH-485). Firmware is listed as FRN 4.46, indicating the installed software revision. This PanelView 300 Micro serves simple machine-level visualization and control tasks, enabling basic tag display, status indicators, and user prompts directly at the operator station, without requiring a PC runtime. Development and deployment are typically done with FactoryTalk View Machine Edition tooling to create the application and download it to the terminal. As part of the PanelView 300 Micro family (Series A hardware), this unit represents legacy, discontinued hardware from Rockwell Automation with documented use in small automation cells and standalone equipment dashboards. Typical applications include local alarms, numeric data entry, and straightforward operator controls for packaging lines, conveyors, or small machining stations when paired with compatible Allen-Bradley PLCs via RS-232 DF1 communication.