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Description
Application Scenarios:In a regional bottled beverage packaging facility, engineers faced recurring issues with capacitive touch HMIs failing due to constant washdown cycles and operator gloves interfering with screen accuracy. By deploying the 2711-K3A5L1, the maintenance team eliminated false inputs and reduced HMI-related downtime by over 35%. The terminal’s DH-485 RS-232 port integrated directly with the existing MicroLogix 1100 PLC network, while the tactile 8-function keypad allowed line operators to navigate alarm screens and adjust filler timing with confident physical feedback—even in wet, high-vibration conditions. This real-world application highlights how 2711-K3A5L1 solves key pain points around durability, legacy network compatibility, and operator precision in fast-paced production environments.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 2711-K3A5L1 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Category | HMI / Operator Interface Terminal |
| Display Type | 3-inch Monochrome Transflective LCD, 128 x 64 resolution, LED backlight (100,000 hr life) |
| Input Type | Membrane Keypad with 8 Programmable Function Keys (F1–F8), Numeric & Navigation Keys |
| Communication Ports | RS-232 (DH-485 Protocol), RS-232 Printer Port |
| Input Power | 18–32V DC Nominal 24V DC, Max 10W (0.42A @ 24V DC) |
| Memory | 240 KB Non-Volatile Flash + 170 KB Runtime; Expandable via ATA Memory Card |
| Environmental Rating | NEMA 12/13, 4X (Indoor), IP54/IP65 Front Panel |
| Operating Temp | 0°C to 55°C (32°F to 131°F) |
| Mounting Method | Panel Mount with Gasket Seal and Locking Clips |
| Dimensions (HxWxD) | 197 x 140 x 82 mm (7.76 x 5.53 x 3.21 in) |
| Software Platform | PanelBuilder32 Configuration Software |
Technical Principles and Innovative Values:
- Innovation Point 1: Purpose-built monochrome transflective LCD technology with integrated long-life LED backlight ensures crisp visibility in both low-light control rooms and high-ambient daylight plant floors, outperforming early-generation passive displays in energy efficiency and readability.
- Innovation Point 2: Dedicated DH-485 RS-232 communication architecture allows 2711-K3A5L1 to drop directly onto legacy Allen-Bradley SLC 500, MicroLogix, and PLC-5 networks without protocol gateways, cutting integration engineering time by up to 40% compared to generic third-party HMIs.
- Innovation Point 3: Industrial-grade domed membrane keypad with stainless-steel tactile domes rated for 2 million presses delivers consistent operator feedback in gloved or high-vibration settings, offering a reliability edge over resistive touchscreens that often drift or fail in washdown areas.
Application Cases and Industry Value:In a municipal water pumping station modernization project, Allen-Bradley 2711-K3A5L1 terminals were installed at distributed wet-well control panels to replace obsolete text-based operator interfaces. The keypad-driven navigation allowed field technicians to acknowledge high-level alarms, manually stage backup pumps, and view real-time pressure setpoints without exposing sensitive touch parameters to accidental activation. Plant supervisors reported improved operational safety and a measurable drop in unnecessary service dispatches. In a secondary application within a corrugated packaging OEM’s die-cutter machines, 2711-K3A5L1 provided a compact, panel-space-saving HMI that communicated seamlessly with MicroLogix 1400 controllers. The OEM standardized the model across its global machine line, reducing spare parts SKU counts by 30% and simplifying technician training thanks to uniform PanelBuilder32 application structures.
