The 2711-K5A20L2 is a high-durability, network-integrated human-machine interface (HMI) from the Allen-Bradley PanelView Standard 550 series. Designed with a corrosion-resistant stainless steel bezel, this terminal is specifically engineered for sanitary and harsh industrial environments, including food and beverage washdown zones, chemical processing, and pharmaceutical manufacturing. It provides reliable real-time operator interaction and machine-level monitoring while maintaining structural integrity against fluid ingress.

Features

• Stainless steel bezel construction rated for NEMA 4X and IP66/IP65 environments.
• Monochrome transflective LCD display with a long-life, field-serviceable LED backlight.
• Integrated membrane keypad featuring 10 assignable function keys (F1-F10) and a full numeric navigation layout.
• Dual-port communication architecture supporting EtherNet/IP for control and a dedicated RS-232 port for local printer logging.
• Expandable non-volatile memory via PCMCIA ATA flash slot for data logging and application storage.
• Battery-backed real-time clock for precise sequence-of-events fault time-stamping.

Applications

This terminal is suitable for applications requiring high-speed, deterministic data exchange in environments where equipment is subject to frequent cleaning or corrosive vapors. It is commonly deployed in automated packaging lines, batch process control, and distributed control systems where host controller overhead must be minimized through local graphical mapping and alarm management.

Technical Specifications

Installation Guidelines

• Ensure the panel cutout is clean and free of debris to maintain the integrity of the NEMA 4X gasket seal.
• Use appropriate torque when securing mounting clips to prevent bezel deformation or gasket failure.
• Route communication cables away from high-voltage power lines and sources of electromagnetic interference (EMI) to ensure signal stability.
• Verify that the AC power supply is within the 85-264 VAC range before applying power.
• Always power down the unit before inserting or removing PCMCIA memory cards to prevent data corruption.
• Maintain adequate clearance around the unit for ventilation and to allow access to the rear communication ports.

FAQ

Is the backlight on this unit replaceable? Yes, the LED backlight is field-serviceable using the 2711-NL1 replacement part.

Can I use the RS-232 port for PLC communication? No, the RS-232 port on this specific model is configured exclusively as a dedicated printer port for hardcopy fault logging.

What is the primary communication protocol? This terminal utilizes the EtherNet/IP protocol over standard TCP/IP network structures for peer-to-peer messaging and control.