The Allen-Bradley 2711-B5A8L3 is a robust operator terminal from the PanelView 550 series, designed to provide reliable human-machine interface (HMI) capabilities in demanding industrial environments. This unit features a hybrid input design, combining a resistive touchscreen with a tactile keypad, allowing for versatile control and monitoring of automated processes. It is engineered for long-term deployment in sectors such as water treatment, chemical processing, and automated manufacturing, where it serves to streamline operator interaction and reduce system downtime.
Hardware Features
The 2711-B5A8L3 utilizes a 5.5-inch monochrome blue-mode LCD display, offering a clear 256 x 128 pixel resolution suitable for process visualization. The input system includes 10 dedicated function keys (F1-F10) alongside a touchscreen matrix with 128 active cells, ensuring operational reliability even in high-vibration settings. For networking and data management, the terminal is equipped with a Data Highway Plus (DH+) communication port for deterministic plant-floor connectivity and an RS-232 serial port for local printer logging.
Technical Specifications
Model
2711-B5A8L3
Brand
Allen-Bradley
Product Line
PanelView 550
Display
5.5-inch Monochrome Blue-Mode LCD
Resolution
256 x 128 pixels
Input Method
Keypad (10 Function Keys) and Touchscreen
Memory
170 KB Runtime / 240 KB Nonvolatile
Communication
DH+ Port, RS-232 Printer Port
Input Voltage
24 VDC (18-32 VDC range)
Operating Temperature
0 to 55 deg C
Installation Guidelines
Ensure the panel cutout is prepared according to the manufacturer's mounting specifications to maintain the NEMA/IP rating of the enclosure.
Verify that the DC power supply is within the 18-32 VDC range before connection to prevent damage to the internal circuitry.
Use shielded cables for DH+ and RS-232 communications to minimize electromagnetic interference (EMI) in high-noise industrial areas.
Always power down the terminal before connecting or disconnecting communication cables or performing maintenance.
Handle the unit with care to avoid damage to the resistive touchscreen overlay and the LCD backlight assembly.
FAQ
Is this terminal still in production? No, the 2711-B5A8L3 is classified as a discontinued or obsolete product by the manufacturer. We provide these units as spare parts for legacy system maintenance.
What is the primary communication protocol for this unit? This model features a dedicated Data Highway Plus (DH+) port, which is the standard for high-speed deterministic networking in legacy Allen-Bradley architectures.
