Description

The Allen-Bradley 2711-B5A8L2 is a high-reliability operator terminal within the PanelView 550 Standard product line. This DC-powered human-machine interface (HMI) is designed for real-time process monitoring, alarm data management, and manual control input in demanding industrial environments. It is suitable for applications in oil and gas, chemical processing, water management, and automated packaging, offering a consolidated electronic interface that replaces traditional hardwired pushbuttons.

Features

• Hybrid input mechanism featuring both a resistive touchscreen and a 10-key mechanical function keypad (F1-F10).
• 5.5-inch monochrome blue-mode LCD display with 256 x 128 pixel resolution.
• Integrated Data Highway Plus (DH+) communication port for deterministic plant-floor networking.
• Dedicated RS-232 serial port for local printer data logging.
• Solid-state LED backlight rated for 100,000 hours of operation.
• Dual-memory architecture with 170 KB for application runtime and 240 KB for nonvolatile storage.

Applications

This terminal is engineered for continuous deployment in severe industrial settings where reliable HMI performance is critical for maintaining operational throughput and reducing unscheduled downtime.

Technical Specifications

Installation Guidelines

• Ensure the terminal is mounted in a panel or enclosure that meets the required NEMA/IP rating for the environment.
• Maintain adequate clearance around the unit for ventilation to prevent overheating.
• Use shielded cables for communication lines (DH+ and RS-232) to minimize EMI interference.
• Ensure the 24 VDC power supply is stable and within the 18-32 VDC range before connection.
• Power down the unit before performing any wiring or maintenance tasks.
• Handle the touchscreen with care; do not use sharp objects for input.

FAQ

Is this unit still in active production?

No, the 2711-B5A8L2 is classified as a discontinued or obsolete product by the manufacturer. We provide these units as surplus or refurbished components to support legacy system maintenance.

What is the primary communication protocol for this terminal?

This model features an integrated Data Highway Plus (DH+) port, which is a deterministic network protocol commonly used in legacy Allen-Bradley control architectures.