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- Allen Bradley
- 2711-B5A2L1
- PanelView 550 Operator Interface
- USA
- 266 x 106 x 167 mm
- 1.2 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Allen-Bradley 2711-B5A2L1 is a PanelView 550 Standard Operator Terminal used as an HMI (Human-Machine Interface) in industrial automation systems. It provides operators with a local interface to monitor and control PLC-based processes.
This model belongs to the PanelView 550 monochrome series, widely used in legacy Rockwell Automation installations.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Model | 2711-B5A2L1 |
| Product Series | PanelView 550 Standard |
| Display | 5.5-inch monochrome LCD (blue mode) |
| Resolution | 256 × 128 pixels |
| Input Type | Touchscreen + 10 function keys (F1–F10) |
| Communication | DH-485 (RS-485 based industrial network) |
| Power Supply | 24 V DC (typical 18–32 V DC range) |
| Memory | ~170 KB runtime application memory |
| Function | Machine monitoring and operator control |
| Weight | ~1.2–1.7 kg (varies by revision) |
| Dimensions | 266 × 106 × 167 mm |
Function and Working Principle
The 2711-B5A2L1 acts as a front-end operator interface between humans and PLC systems. It works by:
- Displaying real-time process data from PLC controllers
- Accepting operator inputs via touchscreen and function keys
- Sending control commands back to PLC systems
- Running applications created using legacy PanelBuilder software
It communicates primarily through DH-485 serial network, typical for older Allen-Bradley systems.
Role in Industrial Systems
This HMI is used to:
- Provide machine visualization and control
- Display alarms, status, and process values
- Allow basic operator interaction with PLC systems
- Support legacy automation architectures
It is still found in many installed industrial systems that have not been upgraded.
Industrial Applications
- Conveyor systems
- Packaging machinery
- Pump and motor control systems
- Material handling equipment
- Legacy manufacturing lines
Installation Notes
- Panel-mounted installation in control cabinet doors
- Requires 24 V DC power supply
- Uses DH-485 communication wiring (shielded RS-485)
- Programming requires PanelBuilder32 software
- Communication setup must match PLC network configuration
Compatible Equipment
- Allen-Bradley SLC 500 PLC systems
- PLC-5 controllers (via DH-485 or adapters)
- MicroLogix controllers (serial communication)
- Legacy Rockwell industrial control systems
Key Advantages
- Simple and reliable operator interface
- Rugged industrial design
- Proven long-term field performance
- Supports keypad and touchscreen input
- Well-suited for legacy PLC systems
Limitations
- Obsolete / discontinued product
- No Ethernet communication support
- Limited memory and graphics capability
- Requires legacy configuration tools
- Being replaced by PanelView Plus series
Replacement Options
| Model | Type | Application |
|---|---|---|
| PanelView Plus 7 | Modern HMI | Ethernet-based upgrade |
| PanelView 800 | Compact HMI | Small machine systems |
| PanelView 5500 | Advanced HMI | ControlLogix systems |
Conclusion
The Allen-Bradley 2711-B5A2L1 PanelView 550 is a legacy industrial HMI used for basic machine control and monitoring in DH-485-based automation systems.
Despite being obsolete, it remains widely installed in industrial environments where stable and simple operator interfaces are still required.