Allen-Bradley HMI model 2711-T6C20L1 is a part of the Allen-Bradley PanelView Plus 6 series. It is a 6-inch color touch screen operator interface panel. The "T6C20L1" designation specifies the model's display size, type, and communication options.

Here's a breakdown of the code:

- "T6": It indicates the display size of 6 inches.

- "C20": It represents the color display feature of the HMI.

- "L1": It signifies the integrated communication options available for the panel.

Some key features of the Allen-Bradley PanelView Plus 6 HMIs include:

1. High-resolution color touch screen display.

2. Support for a wide range of communication options such as Ethernet, serial, and USB.

3. Compatibility with Rockwell Automation's FactoryTalk View software for designing and deploying HMI applications.

4. Robust construction with environmental ratings suitable for industrial environments.

5. Support for multiple languages and display options.

6. Expandable memory options for application storage.