Allen-Bradley 2711-K5A5 PanelView 550 HMI Terminal

Allen‑Bradley PanelView 550 2711‑K5A5 is a 5.5‑inch monochrome HMI terminal with a keypad, designed to serve as a dedicated operator interface for Rockwell Automation PLCs such as SLC 500, PLC‑5, and MicroLogix. The unit features a 5.5" blue‑mode monochrome LCD with a 256 × 128 display resolution and a 4.75" × 2.38" viewable area, backlit by an LED rated for up to 100,000 hours. It uses a stainless‑steel domed membrane keypad with 10 function keys (F1–F10) and an actuation rating of about 1 million presses, plus a real‑time clock that is battery‑backed for accurate timestamping. Onboard memory includes 170 KB of application runtime and 240 KB of nonvolatile RAM for objects, text and bitmaps, with ATA memory card support for program storage and transfer via PanelBuilder32. Communications options on the PanelView 550 family encompass DH‑485 over RS‑232, with additional ports available for DH+, DeviceNet, DF1, Remote I/O, and other Rockwell fieldbuses, enabling integration in DH‑485 networks and broader automation architectures. Power input supports both 18–30 V DC (24 V nominal, up to 18 W) and 85–264 V AC (47–63 Hz, up to 45 VA), giving flexible integration with common plant power. Built for industrial use, the 2711‑K5A5 carries enclosure ratings of NEMA 12/13 and 4X and weighs roughly 6 lb, making it suitable for rugged environments. Development and deployment rely on PanelBuilder32 with support for ATA memory cards to streamline screen updates and object reuse.