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- Allen Bradley
- 2711-K5A3X
- 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-K5A3X is a PanelView 550 Operator Interface (HMI) from Rockwell Automation. It is designed to provide machine-level monitoring and control, allowing operators to interact with PLC systems through a keypad-based industrial display panel.
It belongs to the PanelView Standard 550 series, widely used in older industrial automation systems for status visualization, alarms, and basic operator control functions.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Series | PanelView 550 |
| Model | 2711-K5A3X |
| Product Type | Operator Interface (HMI) |
| Display Type | Monochrome LCD (blue mode) |
| Screen Size | 5.5 inch |
| Resolution | 256 × 128 pixels |
| Input Type | Keypad (function + navigation keys) |
| Communication | DH-485 + RS-232 printer port |
| Input Power | 85–264 VAC, 47–63 Hz |
| Memory | ~170 KB application runtime |
| Environmental Rating | NEMA 12/13, IP54/IP65 (with enclosure) |
| Operating Temperature | 0–55 °C |
| Dimensions | 266 × 106 × 167 mm |
| Weight | 1.2 kg |
Function and Working Principle
The 2711-K5A3X functions as a human-machine interface (HMI) between operators and PLC-controlled machinery.
It works by:
- Receiving process data from PLCs via DH-485 communication
- Displaying real-time machine status, alarms, and process values
- Allowing operator input through keypad commands
- Sending control commands back to the PLC system
It acts as a visual and control layer on top of industrial automation systems.
Key Features
- Compact industrial HMI design
- Keypad-based operation (no touchscreen)
- Reliable DH-485 serial communication
- Simple configuration and long service life
- Built-in alarm handling and process display
- Industrial-grade enclosure compatibility
- Suitable for harsh factory environments
Industrial Applications
- Packaging machines
- Conveyor systems
- Pump and motor control panels
- HVAC and building automation
- Manufacturing production lines
- Legacy PLC control systems (SLC 500 / MicroLogix)
Role in Industrial Systems
The PanelView 550 serves as the operator interface layer, responsible for:
- Displaying machine status and process variables
- Allowing manual control inputs (start/stop, setpoints)
- Displaying alarms and fault diagnostics
- Acting as the communication bridge between operator and PLC
It is typically paired with older Rockwell PLC systems.
Installation Notes
- Panel-mounted installation with cutout support
- Requires stable 85–264 VAC power supply
- DH-485 wiring must be correctly terminated
- Proper grounding is required for noise immunity
- Should be installed in industrial-rated enclosure
- Maintenance is limited due to legacy system design
Compatible Equipment
- Allen-Bradley SLC 500 PLC systems
- MicroLogix PLC series
- DH-485 communication networks
- Industrial control panels and relay systems
- Legacy Rockwell automation architectures
Advantages
- Very robust and reliable in harsh environments
- Simple keypad interface for operators
- Long operational lifespan in industrial settings
- Compatible with widely used legacy PLC systems
- Low maintenance requirements
Limitations
- Obsolete / discontinued product line
- Limited memory and processing capability
- No modern Ethernet-based communication
- Difficult integration with modern PLC systems
- Replacement parts increasingly scarce
Conclusion
The Allen-Bradley 2711-K5A3X PanelView 550 Operator Interface is a durable legacy HMI used for basic industrial machine control and monitoring.
While still functional in many older installations, it is considered obsolete in modern automation systems, where it is typically replaced by PanelView Plus or Ethernet-based HMI platforms.