Allen-Bradley 2711-K5A1 PanelView 550 HMI Panel

The Allen-Bradley 2711-K5A1 PanelView 550 is a compact 5.5-inch monochrome keypad HMI terminal designed to provide a reliable, stand-alone operator interface for industrial PLC systems. It features a blue-mode monochrome LCD with a 256 x 128 pixel resolution and a 120 x 60 mm active display area for crisp readouts in demanding environments, paired with a stainless-steel domed membrane keypad offering 10 function keys (F1–F10) and durable, 1,000,000-press actuation. A real-time clock is battery-backed to timestamp critical data, and the unit includes 170 KB of application runtime memory plus 240 KB of nonvolatile RAM for objects, text, and bitmaps, with ATA memory card support for expandable storage. Software is PanelBuilder32, enabling configuration and programming from a PC. Communications are versatile, including EtherNet/IP, DeviceNet, ControlNet, DH+, Remote I/O, DH-485, RS-232 (DH-485), and RS-232 (DF1), plus an RS-232 printer port for on-device printouts. Power options accommodate both DC and AC installations: 18–30 VDC (24 V nominal) with a maximum 18 W draw, or 85–264 VAC (47–63 Hz) with up to 45 VA, making it adaptable to a range of control panel architectures. This PanelView 550 terminal is documented as the 2711-K5A1 variant, a keypad-equipped 5.5-inch operator interface designed to streamline machine monitoring, operator input, and PLC communication in industrial environments. Typical use cases include standalone machine control panels and process lines where a compact, field-reliable HMI with extensive serial and network connectivity is required.