Allen-Bradley 2711-K5A8 PanelView 550 HMI Display

The Allen-Bradley 2711-K5A8 PanelView 550 is a compact 5.5-inch monochrome keypad HMI terminal for industrial control panels, delivering a 256 x 128 pixel blue-mode LCD with a 4.75 x 2.38 in active display area. It uses a 10‑key keypad (F1–F10) with a stainless-steel domed membrane rated for up to 1,000,000 actuations, making it durable for harsh environments. Communications include a DH+ interface and an RS-232 printer port for simple PLC connectivity and printouts. Onboard memory consists of 170 KB of application runtime and 240 KB of nonvolatile RAM (for application objects plus text and bitmaps), with support for ATA memory cards to extend storage. The real-time clock is battery‑backed to timestamp critical data, and configuration is done with PanelBuilder32 software. The model is part of PanelView 550 standard terminals, featuring a 5.5" monochrome display and related specifications such as a 120 x 60 mm (4.75 x 2.38 in) active area, and it is designed for indoor use in enclosures rated for NEMA 12/13 or 4X with IP54/IP65 compatibility when properly enclosed. Physical installation notes place the unit at a shipping weight of about 6 lb with typical packaging dimensions around 14 x 11 x 8 inches.