The Allen-Bradley 2711P-RDT12C is a 12.1" operator interface display in the Panelview Plus 6 product line. The display combines with the Panelview Plus 6 logic modules to become an assembled item and is only the display module. This is a touchscreen input HMI with color display and has a display quality of 800 x 600 pixels. 

The Allen-Bradley Panelview 550 model 2711-K5A16 is a monochrome LCD, operator interface panel boasting a 5.5-inch blue mode display, a 10-key keypad for input, and supports RS-232 communication. It runs on 120 VAC, with Panelbuilder 32 software, has 170 KB memory, and a replaceable 2711-NL1 backlight. Now obsolete, it facilitated machine control and monitoring.