Description

The Allen-Bradley 2711-B5A3L1 is a PanelView 550 operator terminal designed for reliable human-machine interface (HMI) applications in industrial environments. This DC-powered unit serves as a critical control interface, allowing operators to monitor system variables, execute manual commands, and manage automated processes. Built for durability, the terminal replaces complex physical pushbutton arrays with a consolidated electronic interface, reducing wiring requirements and enhancing system uptime in sectors such as petrochemical, water treatment, and automated packaging.

Features

• Hybrid input configuration featuring both an analog resistive touchscreen and a 10-key tactile function keypad (F1-F10).
• 5.5-inch monochrome blue-mode LCD display with 256 x 128 pixel resolution.
• Integrated DH-485 communication port for multi-node network connectivity.
• Dedicated RS-232 serial port for local printer data logging.
• 170 KB of application runtime memory with non-volatile storage for screen data.
• Field-replaceable backlight module (2711-NL1) to extend operational life.

Applications

This operator terminal is suitable for a wide range of industrial automation tasks, including machine control, process monitoring, and data logging in manufacturing facilities. Its robust design allows for operation in high-vibration environments where traditional mechanical interfaces might fail.

Technical Specifications

Installation Guidelines

• Ensure the terminal is mounted in a panel with adequate clearance for ventilation and cable routing.
• Verify that the 24 VDC power supply is stable and properly grounded to prevent electrical noise interference.
• Use shielded communication cables for DH-485 and RS-232 connections to maintain signal integrity.
• Power down the unit before performing any maintenance, such as replacing the 2711-NL1 backlight module.
• Handle the unit with standard ESD precautions during installation to protect internal circuitry.

FAQ

Is the 2711-B5A3L1 still supported by the manufacturer?

The 2711-B5A3L1 is classified as a discontinued or obsolete product. While it remains a reliable component for existing legacy systems, users should plan for eventual migration to modern HMI platforms.

Can I replace the backlight on this unit?

Yes, the display backlight is field-replaceable using the 2711-NL1 replacement module.

What communication protocols does this terminal support?

This model features an integrated DH-485 port for network communication and an independent RS-232 serial port specifically for printer data logging.