Reliable Industrial Monitoring and Control Interface

The Allen-Bradley 2711P-K4M20D serves as a rugged and efficient Human Machine Interface (HMI) within the PanelView Plus 400 series. Designed for demanding industrial environments, this graphic terminal allows operators to monitor, manage, and display application status information effectively. Although the manufacturer has officially classified this model as discontinued, it remains a critical component for maintaining existing automation lines. Our expertise in sourcing high-quality surplus and refurbished units ensures that your facility avoids costly migrations and maintains peak productivity.

Technical Specifications and Performance Data

The 2711P-K4M20D combines a compact form factor with versatile communication options. Below are the primary technical parameters:

• Manufacturer: Allen-Bradley / Rockwell Automation
• Part Number: 2711P-K4M20D
• Display Type: Grayscale passive matrix, film compensated super-twist nematic (FSTN)
• Display Size: 3.8-inch (77 x 58 mm)
• Resolution: 320 x 240 pixels
• Input Method: Keypad (Function, Numeric, and Navigation keys)
• Input Power: 18–30V DC (24V DC nominal)
• Power Consumption: 25 Watts maximum (1.0 A at 24V DC)
• Internal Memory: 64 MB (Application storage varies by Series A-E)
• Communication Ports: 1 x Ethernet (10/100 Mbps), 1 x RS-232, 2 x USB Host ports
• Weight: 1.25 lbs (0.57 kg)
• Operating Force: 340 g for keypad actuation

Advanced Communication Capabilities

The 2711P-K4M20D offers a comprehensive suite of connectivity options, making it a versatile hub for industrial data exchange.

1. Ethernet Connectivity: The integrated 10/100 Mbps Ethernet port supports high-speed communication over standard LAN cables. This interface allows the HMI to communicate with multiple automation partners simultaneously, facilitating seamless integration into modern factory networks.
2. Serial Communication: The RS-232 port provides essential support for legacy systems. It utilizes DF1 and DH485 protocols, enabling point-to-point connections with various Allen-Bradley controllers over shorter distances.
3. USB Expansion: Two USB host ports allow users to connect peripheral devices such as a keyboard or mouse for easier data entry. Additionally, these ports support removable flash drives for quick log file transfers and application updates.

Durable User Interface and Display

The terminal features a 3.8-inch grayscale FSTN display. While monochrome, the screen provides high contrast and clarity for both text and graphical representations of industrial processes. The LED backlight ensures visibility in various lighting conditions, extending the operational life of the unit.

For user input, the 2711P-K4M20D utilizes a robust keypad assembly. This interface includes programmable function keys, a full numeric keypad, and intuitive navigation buttons. Engineers designed these keys for heavy industrial use, boasting an actuating lifespan of over one million presses. The 340g operating force provides tactile feedback, ensuring operators can interact with the machine even while wearing industrial gloves.

Installation and Power Requirements

This PanelView Plus 400 terminal requires an external DC power source between 18V and 30V DC. Its low power consumption (25W max) makes it an energy-efficient choice for control panels. The compact dimensions allow for installation in tight spaces where larger touchscreen units might not fit. When mounting the device, ensure the environment remains within the standard operating temperature range to protect the internal 64MB memory and electronic components.

Support for Legacy Systems

As an obsolete/discontinued part, the 2711P-K4M20D is highly sought after by maintenance departments that prefer to keep their existing configurations rather than undergo expensive system-wide upgrades. We provide fully tested and inspected units that meet the original factory standards. Replacing a faulty HMI with an identical 2711P-K4M20D eliminates the need for software recompilation or panel cutout modifications, significantly reducing downtime.