Product Description
The Allen-Bradley 2771P-K4M20A PanelView Plus 400 is a 3.5-inch grayscale HMI with a 320x240 resolution, keypad interface, and Ethernet/RS232 communication ports. It facilitates real-time monitoring and control of machines or processes, typically paired with Allen-Bradley PLCs/PACs or third-party controllers. It also features two USB ports for peripherals like keyboards, mice, USB printers, and flash drives. Designed for horizontal flush mounting in NEMA 12/13/4X (indoor), IP54/IP65 enclosures, it operates within a temperature range of 0-55C and specified shock/vibration limits.
Is Your Device Showing These Signs?
The Allen Bradley 2711P-K4M20A HMI commonly experiences issues such as a failed backlight, resulting in a dim or unreadable display, requiring backlight replacement. Touchscreen unresponsiveness or inaccurate calibration is a frequent problem, often necessitating touchscreen replacement or recalibration. Communication failures via the serial or Ethernet ports are observed, traced to faulty communication ICs or damaged connectors, demanding component-level repair. Power supply failures are also common, leading to complete unit inoperability, requiring power supply repair or replacement. Memory corruption or PLC communication errors are addressed through firmware updates or memory module replacement.
Technical specifications
Allen-Bradley (Rockwell Automation) Human Machine Interface (HMI) / Operator Terminal PanelView Plus 400 series with a 3.5-inch grayscale display, 320 x 240 pixels resolution, 77 x 58 mm (3.0 x 2.3 inches) viewing area, keypad input method including numeric keys, navigation keys, and 8 programmable function keys with 1 million actuations (recommended) keypad actuation life, 10-110 g keypad actuation force, Ethernet RJ-45 10/100 Mbps TCP/IP communication port, RS-232 configurable for RS-232 or DH-485 communication port, 2 USB ports for keyboard, mouse, USB flash drives, USB printers, Ethernet communication distance up to 100 meters per segment, RS-232 communication distance up to 15 meters, horizontal mounting orientation, NEMA Type 12, 13, 4X (Indoor use only), IP54, IP65 (Flush Mounted) enclosure rating, 0-55 C (32 - 131 F) operating temperature, 15 g at 11 ms operating shock, 10-57 Hz, 0.012 pk-pk displacements; 57-500 Hz, 2 g pk acceleration operating vibration, primarily designed for use with Allen-Bradley PLCs/PACs, compatible with 3rd party controllers utilizing TCP/IP, RS-232, DH-485 protocols.
Our Repair Process for the
2711P-K4M20A
Our repair process for the Allen Bradley 2711P-K4M20A HMI begins with a comprehensive diagnostic evaluation to pinpoint the failure. Backlight failures are resolved through direct backlight replacement, restoring display visibility. Touchscreen unresponsiveness is corrected via touchscreen replacement or recalibration, ensuring accurate user input. Communication failures are addressed through component-level repair of faulty communication ICs or connector replacement, re-establishing serial or Ethernet connectivity. Power supply failures necessitate power supply repair or complete replacement, restoring unit operability. Memory corruption or PLC communication errors are rectified through firmware updates or memory module replacement, ensuring proper data handling and communication.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
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Ships from Rochester, NY