Allen-Bradley 2711-K5A8L1 PanelView 550 HMI Terminal

Allen-Bradley 2711-K5A8L1 PanelView 550 is a compact monochrome operator terminal that serves as a local HMI for Rockwell Automation control systems. It uses a 5.5-inch monochrome LCD with a 256 × 128 pixel resolution inside a 120 × 60 mm active display area and is controlled via a stainless-steel domed 10-key keypad (F1–F10) for direct operator input. The unit is powered from 18–30 V DC (24 V nominal) with a maximum current draw of 0.75 A (18 W). It integrates DH+ networking and RS-232 interfaces, including a printer port and DH-485 connection, for data exchange with compatible PLCs and devices, configured with PanelBuilder32 software. Onboard memory includes about 170 KB of application runtime and 240 KB of non-volatile RAM for objects, text, and bitmaps, with ATA memory card support for program and media storage. A battery-backed real-time clock timestamps critical data to aid logging and sequencing in unattended installations. This PanelView 550 keypad terminal provides straightforward industrial visualization and control for applications that require a compact, durable HMI with simple local input.