The 2711-T5A8L1 is a Human Machine Interface (HMI) device that is part of the PanelView 550 standard operator terminal by Allen-Bradley. It is electronic hardware, designed for installation near the machine or process being controlled, providing real-time operator monitoring and control interface. This terminal comes with built-in functionalities including a visualization screen, operator input interface, and communication as well as integrated memory modules and other essential components. Specifically, the integrated screen is a 5.5-inch monochrome display with a screen resolution of 256 x 128 pixels. Touch-sensitive cells are distributed along the screen in 24 columns x 18 rows with individual touch cell sizes of 16 x 16 pixels, which amounts to 128 touch cells overall. These cells enable HMI interaction directly touching runtime objects that are linked with operator actions and specific triggers. The built-in communication ports include One (1) Data Highway Plus (DH+) that is compatible for use in multi-node communication applications over long distances using a 3-wire cable specifically, Belden 9463 cable or Allen-Bradley’s 1771-CD cable. The secondary port is an RS232 interface that is mainly used for communicating with an alarm printer for archiving and record-keeping purposes. It is equipped with built-in graphic libraries, alarm, trend, and recipe objects while also supporting the configuration of HMI security.

The 2711-T5A8L1 PanelView 550 Touchscreen is an electronic operator interface which provides functionality with pixel graphics and a color or monochrome display. It is one of the PanelView Standard 550 terminals that communicate with PLC and SLC controllers over DH+ network. The 2711-T5A8L1 PanelView 550 has a touch-screen input system, and an LCD monochrome blue display with a LED backlight. It has a display dimension of 120 x 60 millimeters (4.75 x 2.38 inches), and a display resolution of 128 x 64, with a 100,000-hour, LED back-light standby life. The 2711-T5A8L1 comes with a replaceable battery, and It has Data Highway Plus Communications and an RS-232 communication port and it supports an ATA Memory card. The input voltage of the 2711-T5A8L1 is between 18 to 32 Volts DC (24 Volts DC nominal), with a maximum power consumption of 18 Watts (0.75 Amps at 24 Volts DC), weight of 0.93/1.48 kilograms/pounds, and dimension of (152 x 185 x 82 millimeters (6.0 x 7.28 x 3.20 inches). The 2711-T5A8L1has an operating temperature between 0 and 55 degrees Celsius (32 and 131 degrees Fahrenheit), a storage temperature between -20 and 85 degrees Celsius (-4 and 185 degrees Fahrenheit), and a working relative humidity range between 5 and 95% non-condensing at 0 to 55 degrees Celsius (32 to 131 degrees Fahrenheit) working temperature. It has a Shock rating of 30g, and operational vibration of up to 2g.