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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
| Model |
2711-B5A3L1 |
| Product Line |
PanelView 550 |
| Input Power |
24 VDC nominal |
| Display Size |
5.5 inches |
| Display Type |
Monochrome blue-mode LCD |
| Resolution |
256 x 128 pixels |
| Input Method |
Touchscreen and Keypad |
| Memory |
170 KB application runtime |
| Communication |
DH-485 and RS-232 (Printer) |
| Operating Temperature |
0 to 55 deg C |
| Lifecycle Status |
Discontinued / Obsolete |
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.
