Application Scenarios

At a mid-sized food packaging facility in the Midwest, operators struggled with outdated push-button panels that offered no real-time feedback on filling line status. By retrofitting the production line with the 2711-B5A2, engineers enabled live visualization of fill levels, cycle counts, and alarm logs directly at the machine station. The integrated numeric keypad allowed quick recipe changes without halting production, while the DH485 port ensured seamless communication with the existing SLC 5/04 controller. This upgrade reduced changeover time by 22% and virtually eliminated misloaded batches—proving how the 2711-B5A2 transforms legacy machinery into responsive, data-aware assets.

 

Parameter

Main Parameters Value/Description
Product Model 2711-B5A2
Manufacturer Rockwell Automation (Allen Bradley)
Product Category Operator Interface Terminal / HMI
Display Type Monochrome LCD with anti-glare film
Display Size 5.5 inches (120 x 60 mm viewable area)
Resolution 256 x 128 pixels
Input Interface 10 programmable function keys + numeric keypad + navigation arrows
Communication Ports DH485 (for SLC/PLC 5 communication), RS-232 (printer or serial peripheral)
Power Supply 24 VDC nominal (operating range: 18–32 VDC)
Mounting Method Panel mount with NEMA/IP-rated gasket (IP65/NEMA Type 12/13/4X when properly installed)
Operating Temperature 0°C to +55°C
Firmware Version Typically shipped with Rev L 4.46 (field-upgradable)

 

Technical Principles and Innovative Values

• Innovation Point 1: The 2711-B5A2 uses deterministic polling over DH485 to maintain real-time data synchronization with Allen Bradley PLCs, ensuring sub-second update rates even in electrically noisy plants.
• Innovation Point 2: Its dual-layer keypad design provides tactile feedback and high-cycle durability (>1 million actuations), ideal for gloved operation in cold storage or washdown areas.
• Innovation Point 3: Built-in screen contrast adjustment and backlight compensation allow consistent readability under varying ambient light—from dim warehouses to direct sunlight near loading docks.
• Innovation Point 4: The terminal supports global and local tag assignment, enabling a single function key to trigger different actions depending on the active screen, maximizing usability within limited hardware.

 

Application Cases and Industry Value

In a water treatment plant in Texas, aging analog gauges and manual valves were replaced with automated dosing skids controlled via Allen Bradley 2711-B5A2 terminals. Each unit displayed real-time flow, pH, and chemical concentration, with password-protected access for calibration. Maintenance crews reported a 40% drop in response time to high-turbidity alarms, as the 2711-B5A2 logged event history and highlighted faulted I/O points visually. Over three years, the plant avoided two potential regulatory violations thanks to the terminal’s reliable data integrity and audit trail capabilities.

 

Related Product Combination Solutions

Maximize system compatibility and scalability with these complementary models:

• 2711-K5A1: Keypad-only variant for cost-sensitive applications
• 2711-T5A5L1: Touchscreen version with similar footprint but graphical flexibility
• 1747-PIC: DH485-to-PC interface module for programming and diagnostics
• 2711-NV4: Anti-glare overlay kit to extend screen life in outdoor cabinets
• 1747-L542: SLC 5/04 processor with native DH485 support
• 2711-NC13: Replacement keypad membrane for field maintenance
• 9324-RLD001: RSLogix 500 software license for application development
• 2711-RTC1: Real-time clock module for timestamped event logging