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- Allen Bradley
- 2711-K5A5L1
- PanelView 550 Operator Interface
- USA
- 266 x 106 x 167 mm
- 1.2 kg
- Xiamen, China
- New & In Stock
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Allen-Bradley 2711-K5A5L1 is a PanelView 550 Standard Operator Interface (HMI) used in industrial automation systems to provide operator-level monitoring and control of PLC-driven machines. It features a keypad-based interface and monochrome LCD display, making it suitable for legacy control systems.
It is widely used with older Allen-Bradley SLC 500 and MicroLogix PLC systems, especially in DH-485 communication networks.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Series | PanelView 550 |
| Model | 2711-K5A5L1 |
| Product Type | Operator Interface (HMI) |
| Display | 5.5-inch monochrome LCD (blue mode) |
| Resolution | 256 × 128 pixels |
| Input Type | Keypad (function + navigation keys) |
| Communication | DH-485 / RS-232 |
| Input Power | 18–32 VDC (24V nominal) |
| Memory | ~170 KB runtime application memory |
| Environmental Rating | NEMA 12/13, IP54/IP65 (with enclosure) |
| Operating Temperature | 0–55 °C |
| Dimensions | 266 × 106 × 167 mm |
| Weight | ~1.16 kg |
Function and Working Principle
The 2711-K5A5L1 operates as a human-machine interface (HMI) between operators and PLC systems.
- Communicates with PLCs via DH-485 serial protocol
- Displays real-time process data, alarms, and system status
- Allows operator input through function keys (F1–F10)
- Sends commands back to the PLC for machine control
It acts as the visual control layer in legacy automation systems.
Key Features
- Compact industrial HMI with keypad interface
- Monochrome LCD with long-life backlight (~100,000 hours)
- DH-485 communication for legacy PLC integration
- Built-in alarm and diagnostic display functions
- Rugged industrial design for harsh environments
- Reliable long-term operation in factory systems
Industrial Applications
- Conveyor and material handling systems
- Pump and motor control panels
- Packaging machines
- HVAC and building automation systems
- SLC 500 / MicroLogix PLC-based systems
- Legacy industrial automation installations
Role in Industrial Systems
The PanelView 550 2711-K5A5L1 serves as the operator interface layer, responsible for:
- Displaying machine status and process values
- Allowing manual operator control (start/stop, setpoints)
- Showing alarms and fault diagnostics
- Providing a communication bridge between operator and PLC
Installation Notes
- Panel-mounted installation with cutout enclosure
- Requires stable 18–32 VDC power supply
- Proper DH-485 wiring termination is critical
- Shielding and grounding required for noise immunity
- Must be installed in industrial-rated enclosures
- Typically configured using legacy Rockwell software tools
Compatible Equipment
- Allen-Bradley SLC 500 PLC systems
- MicroLogix PLC series
- DH-485 communication networks
- Industrial relay and control panels
- Legacy Rockwell automation systems
Advantages
- Very robust and reliable in harsh environments
- Simple keypad operation for industrial users
- Long service life in legacy systems
- Stable DH-485 communication support
- Low maintenance requirements
Limitations
- Obsolete / discontinued product
- No Ethernet or modern networking support
- Limited memory and processing capability
- Difficult integration with modern PLC systems
- Replacement parts increasingly scarce
Conclusion
The Allen-Bradley 2711-K5A5L1 PanelView 550 Operator Interface is a durable legacy HMI designed for simple machine control and monitoring.
While still widely used in older automation systems, it is now considered obsolete and is typically replaced by newer PanelView Plus or Ethernet-based HMI platforms in modern industrial upgrades.