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Key Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 2711-K5A5 |
| Product Family | PanelView 550 Standard Operator Terminal |
| Display Size | 5.5-inch (monochrome) |
| Display Type | Monochrome transflective LCD with LED backlight |
| Display Area (W × H) | 120 × 60 mm (4.75 × 2.38 in) |
| Resolution | 256 × 128 pixels |
| Input Methods | Keypad (10 function keys F1–F10, cursor keys, numeric keypad) |
| Application Memory | 170 KB runtime; 240 KB non-volatile (objects, text, bitmaps) |
| Communication Ports | 1 × RS-232 (DH-485); 1 × RS-232 printer port (print only) |
| Communication Cable (DH-485) | 2711-NC13, 2711-NC1, or equivalent null-modem cable |
| Real-Time Clock | Not standard on PanelView 550 (no RTC battery) |
| Backlight Life | ~100,000 hours to ½ brightness at 25 °C |
| Backlight Replacement | 2711-NL5 (LED backlight assembly) |
| Input Voltage | 85–264 V AC, 47–63 Hz |
| Power Consumption | ~36 VA (typical) |
| Panel Cutout (W × H) | 193 × 131 mm (7.60 × 5.16 in) |
| Terminal Dimensions (W × H × D) | 220 × 160 × 110 mm (8.66 × 6.30 × 4.33 in) |
| Mounting Depth | ~82 mm (3.23 in) behind panel |
| Weight | ~1.36 kg (3.0 lb) |
| Operating Temperature | 0 to 55 °C (32 to 131 °F) |
| Storage Temperature | −20 to 70 °C (−4 to 158 °F) |
| Humidity | 5–95% non-condensing |
| Enclosure Rating | NEMA Type 12/13, 4X (indoor use only); IP54, IP65 |
| Certifications | UL, CE, CSA (industrial use) |
Product Introduction
The Allen-Bradley 2711-K5A5 is a PanelView 550 standard operator terminal with a 5.5-inch monochrome LCD and keypad. It provides RS-232 (DH-485) communication for integration with SLC 500, MicroLogix, CompactLogix, and PLC-5 systems in legacy installations.
This HMI is chosen for machine interfaces where a larger monochrome display with keypad input is needed, but color and touch are not required. In field deployments, it’s commonly used on conveyors, mixers, and small process skids where DH-485 networking and simple alarm/setpoint screens are sufficient.
2711-K5A5
2711-K5A5
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No display, no backlight | AC power missing or internal PSU fault | ✅ High | Measure 85–264 V AC at input terminals; check internal fuse | Fix AC supply and wiring before swapping HMI |
| Backlight on but screen blank | Application not loaded or corrupted | ✅ Medium | Check for “No Application” or similar message; try PanelBuilder 32 download | Reload application; verify DH-485 node and baud settings |
| Keys unresponsive or intermittent | Membrane damage or contamination | ✅ Medium | Inspect keypad overlay; run key test in terminal setup | Replace keypad/membrane if keys are stuck or unresponsive |
| DH-485 communications failing | Node address/baud mismatch or cable fault | ✅ High | Verify DH-485 node, baud rate, and cable continuity; monitor with RSLinx | Correct DH-485 config; replace RS-232 cable if open/short |
| Display dim or faint | Backlight aging or driver issue | ✅ Medium | Measure backlight brightness; check for dimness in bright ambient light | Replace backlight assembly (2711-NL5) if dim/faint |
| Application data lost after power-off | Non-volatile memory fault or corruption | ✅ Low | Check if application reverts to default after power cycle | Reload application; replace terminal if corruption persists |
If you’re stuck, send photos of the terminal (including rating label), a screenshot of the blank screen or fault, and your DH-485 settings. We’ll review it before you swap the unit.
Frequently Asked Questions (FAQ)
Q: Is the 2711-K5A5 hot-swappable?
A: No. The 2711-K5A5 must be installed and removed with AC power OFF. Hot-swapping can damage the power supply and communication ports.
Q: What’s the difference between 2711-K5A5 and 2711-K5A5L1?
A: Both are PanelView 550 monochrome terminals. K5A5 uses RS-232 (DH-485) and RS-232 printer. K5A5L1 adds a local DH-485 port (with terminal block) and RS-232 printer. Choose based on your wiring preference (connector vs terminal block).
Q: Can I use the 2711- with ControlLogix over EtherNet/IP?
A: No. The 2711- has RS-232 (DH-485) and serial printer ports only. For EtherNet/IP, you need a PanelView Plus or newer HMI with an Ethernet port.
Q: What software do I need to program the 2711-?
A: PanelBuilder 32 is used to create and download applications to the 2711-. It runs on Windows and communicates via RS-232 (DH-485).
Q: What condition are these units in, and why is pricing lower than factory?
A: We sell New Original (New Surplus) and Refurbished (tested) units. Pricing is lower because these are surplus or professionally refurbished, and the PanelView 550 line is discontinued. Each refurbished unit goes through power, display, and communication tests and comes with a 1-year warranty.
Q: Can I keep my existing application when swapping a failed 2711-?
A: Yes, if the replacement is the same catalog number and you have a PanelBuilder 32 backup. Download the existing .MER runtime file to the new terminal and verify DH-485 node and baud settings.
Q: What is the recommended replacement for the 2711-?
A: Rockwell’s migration path is PanelView Plus 6 / 7 (e.g., 2711P-… series) with FactoryTalk View ME. Migration requires application conversion and new communication wiring (Ethernet or serial, depending on model).
