Allen-Bradley 2711-B5A1 Human Machine Interface Panel

Allen-Bradley 2711-B5A1 PanelView 550 is a 5-inch, keypad-equipped human–machine interface terminal designed for direct integration with PLC-5 and SLC 500 controllers via Remote I/O (RIO) and RS-232 ports, featuring a monochrome LCD with blue-mode display. It provides a 4.75 x 2.38-inch display area with a 256 x 128 native resolution and LED backlight, plus 170 KB of application runtime memory and 240 KB of nonvolatile RAM, with ATA memory card support and PanelBuilder32 software for creating operator interfaces. Power is supplied from 18–30 V DC (24 V nominal) with a maximum draw of 18 W, and it exposes multiple serial and fieldbus options including RIO, DH-485, RS-232 (DH-485) and RS-232 (DF1) for data exchange and printer connectivity; the keypad delivers 10 function keys (F1–F10) and a battery-backed real-time clock timestamps critical data.