2711P-K4M20D PanelView Plus 400

In the field of industrial automation, Allen Bradley (Rockwell Automation)'s PanelView series has always been a benchmark product for Human Machine Interfaces (HMIs). Today, we'll delve into a classic but discontinued model—the 2711P-K4M20D PanelView Plus 400. Although this compact operator terminal has left the market, it continues to operate reliably in many existing production lines. Understanding its specifications and positioning remains crucial for maintenance and upgrade projects.   Product Overview   The 2711P-K4M20D is a graphical operator terminal in the Allen Bradley PanelView Plus 400 series. It features a 3.8-inch grayscale FSTN (thin-film compensated super-twisted nematic) passive matrix display with a resolution of 320 x 240 pixels. This HMI device uses a keyboard input method, including function keys, numeric keys, and navigation keys, providing reliable physical feedback to the operator. For communication, it integrates Ethernet, RS-232, and two USB host ports, allowing for flexible connection to various controllers and peripherals. This model is powered by 18-30V DC with a maximum power consumption of 25W, making it suitable for machine-level monitoring and control applications.   Specifications Details Display Type 3.8-inch grayscale FSTN LCD Resolution 320 x 240 (QVGA) Input Method Keyboard (Function Keys, Numeric Keys, Navigation Keys) Memory 256 MB RAM / 512 MB Flash Memory (5-10 MB for earlier A/B series applications) Communication Ports 1 x Ethernet, 1 x RS-232, 2 x USB Host Ports Power Requirements 18-30V DC (nominal 24V DC) Power Consumption 25W max (1.0A @ 24V DC) Operating Temperature 0 to 55°C (32 to 131°F) Weight Approx. 0.57 kg (1.25 lbs) Software FactoryTalk View Machine Edition (ME)   Comparison of Models in the Same Series: How to Choose the Right PanelView Plus 400   While the PanelView Plus 400 series is compact, it offers a variety of configuration options to meet different application needs. Below is a comparison of the main models in the same series as the 2711P-K4M20D:   2711P-K4M20D vs other models in the same series   Comparison Items 2711P-K4M20D 2711P-K4C3D 2711P-B4C3D 2711P-K4M5A Display Type Grayscale FSTN Color TFT Color TFT Grayscale FSTN Screen Size 3.8 inches 3.5 inches 3.5 inches 3.5 inches Input Method Keyboard Keyboard Keyboard + Touchscreen Keyboard Power Supply 18-30V DC 18-30V DC 18-30V DC 85-264V AC Communication Ethernet + RS-232 + USB DH-485 + USB DH-485 + USB Ethernet + RS-232 + USB Typical Applications Basic monitoring and text display Simple color interface Interactive color interface Basic monitoring (AC power supply)   Model Naming Explained Understanding the PanelView Plus model naming rules can help you quickly identify product features:   Teardown of 2711P-K4M20D:   2711P = PanelView Plus series   K = Keypad input   4 = 400 series (3.x inch screen)   M = Grayscale display (Monochrome/Grayscale)   20 = Communication configuration (Ethernet + RS-232 + USB)   D = Hardware version series   Common variations within the same series:   **B** = Touchscreen or keyboard + touchscreen (e.g., 2711P-B4C3D)   **C** in the fourth position = Color display     **A** at the end = AC power   Frequently Asked Questions (FAQ)   Q1: Which controllers can the 2711P-K4M20D be used with?   A: This HMI is highly compatible with various Allen Bradley PLCs. Through Ethernet/IP protocols, it can seamlessly integrate with CompactLogix and ControlLogix series PLCs; through the RS-232 serial port, it supports DF1 and DH485 protocols and can connect to traditional controllers such as SLC 500 and MicroLogix. It is also the recommended HMI choice for CompactLogix control systems, suitable for medium-sized applications. Third-party controllers that support Modbus TCP/RTU can also communicate via Ethernet or RS-232.   Q2: This device is discontinued. What if it breaks down?   A: The 2711P-K4M20D was officially discontinued on September 30, 2022. For maintaining existing systems, the following options are available:   Used/Refurbished Market: Many professional suppliers (such as DO Supply and TCI Supply) still have stock or refurbished units available for purchase.   System Upgrade: Migrating to the new generation PanelView Plus 7 series, although requiring application rewriting, offers better performance and longer lifecycle support.   Spare Parts Stockpiling: It is recommended to stockpile replacement units in advance for critical production lines.   Q3 (Compatibility Q&A): What software is used for programming the 2711P-K4M20D? Which memory cards are compatible?   A: Programming Software: Rockwell Automation's FactoryTalk View Studio (Machine Edition) is required for application development and configuration. The device itself comes pre-installed with FactoryTalk View Machine Edition (ME) runtime software, requiring no additional activation.   Memory Card Compatibility: This terminal supports Type 1 CompactFlash (CF) cards for application storage, firmware upgrades, and data logging. A classic CF card capacity of 512MB or smaller is recommended, as newer, higher-capacity cards may have compatibility issues.   Search Keywords   If you need to find further information about the 2711P-K4M20D, you can use the following keywords:   Allen-Bradley 2711P-K4M20D   PanelView Plus 400 specifications   2711P-K4M20D Datasheet   PanelView Plus 400 manual   2711P-K4M20D replacement   FactoryTalk View ME HMI   Allen-Bradley discontinued HMI   CompactLogix HMI 400   Summary   As a representative product of the PanelView Plus 400 series, the 2711P-K4M20D, with its compact design, reliable keyboard input, and stable grayscale display, holds a place in small and medium-sized industrial control applications. Although discontinued, it is still widely used in the second-hand market and existing systems [Source: ]. For devices that are still in operation, understanding their technical specifications and compatibility is crucial for routine maintenance; while for users planning to upgrade, choosing the new generation PanelView Plus 7 series can provide better performance and longer lifecycle support.