The Allen-Bradley Panelview 550 2711-B5A16, by Rockwell Automation, is a 5.5-inch monochrome HMI offering keypad and touchscreen input. It enables RS-232 communication and has 170 KB memory, supporting Panelbuilder 32. Despite being discontinued, it remains a reliable interface for industrial control systems. Manufacturer Rockwell Automation Brand Allen-Bradley Part Number/Catalog No. 2711-B5A16 Product Line Panelview 550 Display Size 5.5 in. Display Color Monochrome LCD blue mode Input Type Keypad and Touchscreen Communication RS-232 (DF1) Communication and RS-232 Printer/Download Port Input Power 100-240V AC Software Panelbuilder 32 Memory 170 KB application runtime Backlight 2711-NL1 Communication Cable 2711-NC13 Shipping Weight 6 lbs Shipping Dimensions 14x11x8 inches Series A,B,C,D,E,F,G,H Firmware 1.00-4.48 Product Lifecycle Status* Discontinued/Obsolete