Allen-Bradley 2711-K5A1 PanelView 550 HMI Panel

The Allen-Bradley 2711-K5A1 PanelView 550 is a 5.5-inch monochrome HMI panel with a stainless-steel domed membrane keypad, designed as a rugged operator interface for Rockwell Automation PLC systems. It features a 256 × 128 pixel monochrome LCD with blue-mode display and a 4.75 × 2.38 inch active area, driven by a long-life LED backlight rated for about 100,000 hours. The unit is powered from 18–30 V DC (nominal 24 V) and draws up to 18 W, with memory including 170 KB of application runtime and 240 KB of nonvolatile RAM for objects, text, and bitmaps, plus support for an ATA memory card. Real-time clock functionality timestamps critical data with battery-backed operation. Communications options cover EtherNet/IP, DeviceNet, ControlNet, DH+, Remote I/O, DH-485, and RS-232 (DH-485) as well as RS-232 (DF1) for printer interfaces, enabling flexible integration into existing networks. The keypad provides 10 function keys (F1–F10) and is rated for up to about one million actuations, while the PanelView 550 software ecosystem relies on PanelBuilder32 for application creation. Firmware on this model is FRN 4.48, and the device is documented as part of the PanelView Standard 550 terminal family, suitable for standalone operator panels or as a practical interface to PLC-based processes in manufacturing environments.