Product Overview
The Allen-Bradley 2711-T5A20L1 is a PanelView 550 Standard operator interface terminal manufactured by Rockwell Automation, delivering rugged machine-level visualization in a compact, monochrome touch-screen format. The model designation breaks down clearly across its key attributes: the 2711 prefix identifies the PanelView Standard family, “T5” denotes the 550-series touch-screen configuration, “A” specifies the blue-mode monochrome LCD, “20” identifies embedded EtherNet/IP communication over 10Base-T, “0” confirms a touch-only interface with no physical function keys, and “L1” indicates 24V DC power — with the /A suffix marking this unit as a Series A revision. This makes the 2711-T5A20L1 the Ethernet-ready touch variant within the 550 family, ideal for installations that need networked HMI connectivity without giving up panel space.
The terminal presents process graphics on a 5.5-inch monochrome blue-mode LCD with a 120 × 60 mm (4.75 × 2.38 in) viewing area, 256 × 128 pixel resolution, and a 100,000-hour LED backlight that eliminates lamp-replacement downtime over the life of the installation. The analog resistive touch screen provides 128 individually addressable touch cells rated for one million actuations, while the 2711-T5A20L1 also supports advanced alarm handling, screen security, analog gauges, ATA memory-card storage, universal language support, and online printing through its dedicated RS-232 printer port at selectable baud rates of 1200, 2400, 9600, and 19,200 bps.
Programmed with PanelBuilder32 development software, the 2711-T5A20L1 connects natively to SLC 500, PLC-5, and MicroLogix controllers across EtherNet/IP, and the wider PanelView Standard platform also supports DeviceNet, ControlNet, DH-485, DH+, and remote I/O on sibling catalog numbers. With 170 KB of application runtime memory, 240 KB of nonvolatile RAM, a battery-backed real-time clock, and a NEMA/UL Type 12, 13, and 4X (indoor) enclosure with IEC IP54/IP65 compliance, the 2711-T5A20L1 delivers the proven reliability, network flexibility, and long service life that have made PanelView 550 terminals a fixture on production lines worldwide.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 2711-T5A20L1 / Series A (Rev. A) |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | Operator Interface Terminal (HMI) |
| Product Series | PanelView Standard 550 |
| Display Size & Type | 5.5-inch monochrome blue-mode LCD with LED backlight |
| Display Area / Resolution | 120 × 60 mm (4.75 × 2.38 in); 256 × 128 pixels |
| Backlight Life | 100,000 hours LED |
| Operator Input | Analog resistive touch screen — 128 touch cells, 1 million actuations |
| Function Keys | None (touch-only configuration) |
| Application Memory | 170 KB runtime; 240 KB nonvolatile RAM |
| Real-Time Clock | Battery-backed, field-replaceable battery |
| Expansion Storage | ATA memory card supported |
| Programming Software | PanelBuilder32 |
| Communication Ports | Embedded EtherNet/IP (10Base-T); RS-232 printer port |
| Printer Port Baud Rates | 1200 / 2400 / 9600 / 19,200 bps |
| Supply Voltage | 18–30 V DC (24 V DC nominal) |
| Power Consumption | 18 W maximum (0.75 A at 24 V DC); heat dissipation ≈ 20 W |
| Dimensions (H × W × D) | Approx. 152 × 185 × 82 mm (6.0 × 7.28 × 3.2 in) |
| Weight | Approx. 0.93 kg (2.1 lb) |
| Operating Temperature | 0 °C to +55 °C (32 °F to 131 °F) |
| Storage Temperature | −20 °C to +70 °C (−4 °F to 158 °F) |
| Relative Humidity | 5 % to 95 % non-condensing at 0–30 °C |
| Vibration / Shock | 2 g up to 2000 Hz; 30 g operating / 50 g non-operating |
| Altitude | 2,000 m (6,561 ft) maximum operating |
| Enclosure Rating | NEMA/UL Type 12, 13, 4X (indoor); IEC IP54 / IP65 |
| Certifications | UL 508, UL 1604 Class I Div 2 Groups A–D T4 (Series H or later), CSA, EN61131-2 |
Main Features and Advantages
Embedded EtherNet/IP Connectivity in a Compact Footprint: The defining advantage of the 2711-T5A20L1 is its built-in 10Base-T Ethernet port, which allows the terminal to communicate with SLC 5/05, PLC-5E, and EtherNet/IP-enabled controllers without additional communication modules or serial cabling runs. For plants migrating from point-to-point serial architectures, the 2711-T5A20L1 offers a natural upgrade path that preserves the existing PanelBuilder32 application while unlocking faster networked data exchange and easier multi-terminal deployments across the facility.
High-Contrast Monochrome Display with Long-Life Backlight: The terminal’s 5.5-inch blue-mode LCD delivers excellent readability under variable plant lighting, with sharp 256 × 128 pixel rendering of text, bitmaps, bar graphs, and alarm banners. Because the LED backlight is rated at 100,000 hours, the 2711-T5A20L1 can operate continuously for more than a decade of single-shift duty before any significant brightness degradation — a dramatic improvement over the 25,000–50,000 hour lamps fitted to older CCFL-based HMIs and a major contributor to reduced lifecycle maintenance cost.
Durable Touch Interface Built for Industrial Use: The analog resistive touch screen of the 2711-T5A20L1 provides 128 discrete touch cells rated for one million presses, responding reliably to fingertip, stylus, or gloved-hand operation. Touch-only operation maximizes the available screen area for process graphics while eliminating the mechanical wear points associated with physical keypads, and the sealed front bezel preserves the terminal’s NEMA/UL Type 12, 13, and 4X (indoor) rating against dust, oil, and light washdown exposure.
Flexible Data Management and Peripheral Support: With 170 KB of application runtime and 240 KB of nonvolatile RAM, the 2711-T5A20L1 handles complex screen sets, alarm databases, and bitmap graphics comfortably. Support for ATA memory cards enables offline application transfer, backup, and duplication between terminals without a laptop, while the dedicated RS-232 printer port supports online event and alarm printing — a valuable audit capability in regulated or batch-driven processes.
Rugged, Standards-Compliant Construction: Rated for 0 °C to +55 °C operation, 2 g vibration up to 2000 Hz, 30 g operating shock, and altitudes up to 2,000 m, the 2711-T5A20L1 tolerates the electrical noise, thermal cycling, and mechanical stress typical of plant-floor environments. Compliance with UL 508, UL 1604 Class I Division 2, CSA, and EN61131-2 gives system integrators the certification coverage needed for hazardous-location and export installations alike.
