Description
1. Product Overview
Allen‑Bradley 2711‑K5A2 is the classic PanelView 550 series industrial keypad‑operated Human‑Machine Interface (HMI) from Rockwell Automation. As a standardized on‑site operation terminal of the 2711 series, it is custom‑designed for legacy Rockwell‑Automation PLC industrial control systems, complete process automation equipment, production‑line units and power control systems. Adopting full‑physical‑keypad operation architecture and equipped with a 5.5‑inch industrial monochrome FSTN LCD display, it delivers highly‑reliable, maintenance‑free functions including on‑site equipment monitoring, process parameter modification, operating status viewing, fault‑alarm reset and manual sequence operation. It serves as a core human‑machine interaction device for harsh working conditions featuring heavy dust, high vibration, oil contamination, humidity and drastic temperature fluctuations where touch‑screen operation is not applicable.
The 2711‑K5A2 is equipped with DH‑485 industrial bus and RS‑232 dual‑communication interfaces, natively compatible with full‑range legacy AB PLC controllers. It features high networking‑protocol compatibility, stable data transmission and strong anti‑interference capability. High‑speed data exchange and real‑time linkage with the main control system can be realized without additional protocol‑conversion modules. Built with industrial reinforced metal housing and a front dust‑proof & moisture‑proof high‑protection panel, it supports standard cabinet flush‑mount installation and adapts to 7×24‑hour non‑stop factory production. Benefiting from streamlined hardware architecture, extremely low failure rate, drift‑free long‑term data operation, aging‑resistance and vibration‑resistance, it is widely used for matching legacy industrial‑control systems, technical‑retrofit replacement of field terminals and operation‑maintenance upgrade of traditional production lines. It is a highly‑versatile and highly‑reliable non‑destructive in‑situ replacement model for industrial sites.
2. Functional Features
Industrial Monochrome High‑definition Display for Clear Visibility under All Working Conditions
Equipped with a 5.5‑inch industrial‑grade FSTN monochrome LCD display at a physical resolution of 256×128 pixels and an industrial high‑contrast backlight system, it delivers sharp images and high character recognizability. Compared with consumer‑grade display devices, it achieves no black screen on cold startup, no screen distortion under high‑temperature operation, legible reading under strong‑light environments, zero brightness degradation and no image ghosting or stuttering over long‑time runtime. It steadily presents equipment operation screens, process parameters of temperature, pressure and flow, equipment start‑stop status, fault codes and alarm prompts round‑the‑clock, perfectly adapting to harsh industrial environments with uneven lighting, large temperature differences and heavy dust in workshops.
All‑metal Membrane Keypad Architecture for Durability and Maintenance‑free Performance under Severe Conditions
It adopts integrated industrial stainless‑steel membrane keypad layout consisting of numeric keys, function keys and navigation keys, featuring stable actuation feel, long mechanical service life, mis‑operation prevention, oil‑resistance and wear‑resistance. The full‑physical‑keypad design completely eliminates common touch‑screen failures such as display drift, touch malfunction, glass breakage and mis‑operation caused by humidity. It perfectly fits high‑intensity industrial sites of heavy industry, chemical industry, rubber‑plastic, packaging and water treatment with high vibration, heavy oil contamination and dense dust. It requires no calibration or maintenance on a daily basis and enjoys much longer service life than conventional touch‑screen HMI terminals.
DH‑485 + RS‑232 Dual‑link Communication with In‑depth Compatibility for AB Systems
On‑board dedicated DH‑485 industrial bus interface and RS‑232 serial communication interface realize independent and complementary dual‑link networking, natively compatible with full‑range legacy Rockwell‑Automation PLC industrial‑control systems. The DH‑485 bus fits industrial long‑distance and heavy‑electromagnetic‑interference networking scenarios with stable transmission, low latency and high networking fault tolerance. The RS‑232 serial port supports program upload & download, equipment parameter commissioning and point‑to‑point connection with upper‑level devices. It meets demands for regular equipment‑monitoring networking and daily operation‑maintenance commissioning. Plug‑and‑play performance and outstanding compatibility are achieved without extra adapter modules.
Full‑function Local Human‑machine Interaction to Streamline On‑site Operation and Maintenance Workflow
It covers complete human‑machine interaction functions for industrial sites: real‑time acquisition, refresh and display of core equipment operating parameters, process conditions, unit start‑stop status, fault‑alarm codes and abnormal‑condition information. Meanwhile, it supports local on‑site operations including parameter modification, manual equipment start‑stop, fault acknowledgement & reset, process‑mode switching and operating‑status query. Field technicians can independently complete daily equipment operation, troubleshooting and parameter commissioning without upper‑level computers, greatly shortening downtime for fault diagnosis, simplifying management workflows for automated equipment and improving on‑site maintenance efficiency.
Industrial‑grade Reinforced‑protection Design for Long‑term Continuous and Stable Operation
The unit features high‑strength reinforced metal housing. Its front‑panel delivers high‑standard industrial protection against dust, moisture and oil contamination, tolerating workshop dust accumulation, mild moisture condensation, oil stains, continuous equipment vibration and start‑stop impact. Having passed strict high‑low‑temperature cycling, vibration‑shock and EMC tests, it boasts excellent electromagnetic‑interference immunity, anti‑aging and vibration‑resistant performance. It supports year‑round 7×24‑hour non‑stop production with zero on‑site failure, no data drift, no screen stuttering and no communication dropout.
Standardized Flush‑mount Installation for Non‑destructive Retrofit and Upgrade of Legacy Systems
It strictly follows original‑factory specifications of PanelView 550 series. Cut‑out dimensions, mounting method, housing thickness and hardware interface definitions are fully interchangeable. Communication protocols, configuration logic and power‑supply specifications are fully compatible with terminals of the same series. It can directly replace on‑site defective units suffering from screen failure, keypad malfunction, communication anomaly and data disorder. No cabinet reconstruction, reprogramming or networking‑parameter re‑commissioning is required. Equipment repair and system upgrade can be completed within short downtime with low retrofitting cost, high efficiency and prominent cost‑effectiveness.
3. Technical Parameters
Basic Specifications
Product Model: 2711‑K5A2；Brand & Manufacturer: Allen‑Bradley (Rockwell Automation)；Product Series: PanelView 550 2711‑Series Industrial HMI Terminal；Product Type: Keypad‑operated Industrial HMI Operation Terminal；Core Positioning: Core unit for local monitoring, parameter commissioning, fault indication and human‑machine interaction of industrial automation equipment；Core Features: 5.5‑inch monochrome high‑definition display, full‑industrial keypad operation, DH‑485 / RS‑232 dual‑communication, reinforced metal housing, wide‑temperature operation, high anti‑interference performance, non‑destructive replacement for legacy systems.
Display and Storage Parameters
Display Screen: 5.5‑inch FSTN industrial monochrome LCD；Backlight: High‑contrast industrial long‑life backlight for round‑the‑clock clear visibility；Resolution: 256 × 128 pixels；Program Storage: 240 KB non‑volatile storage space；Application Memory: 170 KB；Storage Characteristics: Data retention upon power loss, no battery backup required for configuration data；Operation Method: Industrial stainless‑steel membrane keypad (numeric keys + function keys + navigation keys)；Operation Characteristics: Oil‑resistant, wear‑resistant, mis‑operation‑proof, ultra‑long actuation service life；Display Functions: Real‑time screen refresh, synchronous parameter update, fault pop‑up alert, real‑time equipment‑status linkage.
Communication Parameters
Communication Interfaces: DH‑485 industrial bus interface, RS‑232 serial communication interface；Networking Protocol: Natively compatible with proprietary AB PLC communication protocols；Networking Modes: Industrial bus networking, point‑to‑point serial connection；Transmission Characteristics: Low‑latency, high‑stability, strong electromagnetic‑interference‑resistance, precise data synchronization；Compatible Systems: Full‑range legacy Rockwell‑Automation PLC industrial‑control systems and supporting automation equipment of 2711 series；Supported Functions: Configuration‑program read‑write, process‑parameter modification, real‑time equipment‑status monitoring, fault‑information upload, remote & local equipment commissioning.
Electrical Operating Parameters
Power Supply: 100～240 V AC industrial wide‑range AC power supply；Frequency: 50/60 Hz；Maximum Power Consumption: 6 W；Operation Mode: 7×24‑hour year‑round non‑stop continuous operation；Anti‑interference Grade: Industrial Class‑A EMC, resistant to high‑frequency workshop electromagnetic crosstalk and interference from variable‑frequency devices；Operating Characteristics: Free of screen flicker, garbled data, communication dropout, keypad sticking & malfunction and parameter drift.
Environmental and Mechanical Parameters
Operating Temperature: ‑10℃～+60℃；Storage Temperature: ‑25℃～+85℃；Operating Humidity: 5%～95% non‑condensing；Panel Protection: Industrial dust‑proof, moisture‑proof and oil‑proof protection；Housing Material: High‑strength industrial reinforced metal enclosure；Overall Weight: 1.13 kg；Shock‑vibration Resistance: Tolerant of equipment start‑stop impact, continuous cabinet vibration and minor workshop mechanical vibration；Installation Mode: Standard cabinet panel flush‑mount；Applicable Conditions: Continuous‑production scenarios for light‑industry, rubber‑plastic, packaging, chemical, metallurgical, water‑treatment and traditional assembly‑line automation equipment.
4. Hardware Configuration and Structural Advantages
Robust Industrial Full‑keypad Architecture for Extreme‑condition Adaptation
Abandoning the weaknesses of vulnerable and failure‑prone touch screens, the dedicated full‑physical‑keypad industrial design targets severe industrial sites with dust accumulation, oil contamination, high‑frequency vibration and sharp temperature swings. The stainless‑steel membrane keys are wear‑resistant, corrosion‑resistant, dust‑proof and water‑proof, maintaining responsive performance without sticking, malfunction or mis‑operation under long‑term high‑frequency actuation. It delivers far superior structural durability and working‑condition adaptability compared with ordinary touch‑screen HMIs, and fits year‑round high‑intensity production scenarios.
DH‑485 Industrial‑bus Communication for Perfect Compatibility with Legacy AB Systems
Equipped with AB‑exclusive DH‑485 industrial bus deeply adapted to communication logic of legacy Rockwell‑Automation industrial‑control systems, it achieves high‑synchronization data exchange, ultra‑low transmission latency and excellent networking stability without compatibility bugs of generic protocols. Complemented by RS‑232 serial port for dual‑link redundancy, it meets demands for centralized workshop bus‑networking monitoring as well as standalone equipment commissioning, program read‑write and upper‑level connection. No additional conversion modules are needed for convenient networking and full‑range adaptability.
Industrial Monochrome Long‑life Display with Zero Degradation over Years of Operation
The industrial‑grade FSTN monochrome display is purpose‑built for industrial continuous‑production conditions, featuring stable backlight brightness and high image contrast. Its performance remains unaffected by strong / dim workshop lighting or high‑low‑temperature environments. No screen yellowing, brightness dimming, image ghosting or display defects occur during long‑term runtime. It features long service life and reduces later‑stage maintenance costs and downtime frequency by eliminating frequent component replacement.
Reinforced Integrated Metal Housing for Robustness and Excellent Stability
Constructed from high‑strength reinforced metal enclosure, the unit is pressure‑resistant, impact‑resistant, deformation‑resistant and corrosion‑resistant. Compared with plastic‑housing terminals, it gains prominent improvement in shock‑resistance, dust‑proofing, moisture‑proofing, anti‑aging and electromagnetic‑interference immunity. It withstands complex harsh industrial‑site conditions with extremely low hardware failure rate, guaranteeing continuous and stable production of production lines from the hardware perspective.
Low‑power Stable Operation with Outstanding Maintenance‑free Performance
Adopting streamlined and optimized industrial‑circuit architecture, the terminal consumes low power and generates little heat with few high‑frequency vulnerable electronic components for highly‑reliable hardware structure. Periodic operations including screen calibration, keypad inspection and parameter reset are not required. Stable 7×24‑hour continuous operation drastically cuts manual‑maintenance workload and equipment‑failure‑caused downtime.
Original‑factory Standardized Universal Design for Efficient and Convenient Non‑destructive Replacement
It fully complies with original‑factory general technical standards of Rockwell‑Automation PanelView 550 series. Mounting cut‑out dimensions, interface definitions, communication protocols, configuration logic and power‑supply specifications are fully interchangeable. Direct plug‑and‑play replacement is available for defective legacy terminals. No program revision, field‑wiring alteration or networking re‑commissioning is required. Equipment repair and technical‑retrofit upgrade can be finished within short downtime to resolve failures of legacy terminals with high efficiency and low cost.
5. Application Scenarios
Traditional Automated Assembly‑line Equipment: Widely applied on packaging machinery, textile machinery, rubber‑plastic molding equipment, conveyor lines, printing machines and other conventional automated production lines as dedicated local operation terminals. It performs basic human‑machine interaction tasks including equipment start‑stop control, process‑parameter adjustment, process‑status monitoring and fault‑code viewing & reset.
Complete AB PLC Industrial‑control Systems: Precisely matched with full‑range legacy Rockwell‑Automation PLC control systems as local visualization operation units. It monitors core process parameters such as temperature, pressure, speed and flow in real‑time and implements local equipment control, effectively compensating for deficiencies of on‑site operation and visualization in systems without upper‑level touch‑screen HMIs.
Power Equipment for Heavy Industry, Chemical Industry and Water Treatment: Adapted to severe working conditions of metallurgy, chemical, building‑material and sewage‑treatment industries characterized by heavy dust, high vibration, oil contamination and high humidity. It is used for operating‑status monitoring, parameter adjustment and local fault disposal of fans, water pumps, heat‑exchanger units and complete process units to guarantee stable operation of auxiliary power equipment.
- Technical Retrofit and Maintenance of Legacy Industrial‑control Systems: Realizes in‑situ non‑destructive replacement and upgrade for failures of legacy 2711‑series HMI terminals such as screen damage, keypad malfunction, communication dropout, data garbling, parameter drift and equipment offline. It rapidly restores complete human‑machine‑interaction functions of equipment without overall system reconstruction, greatly lowering retrofitting and maintenance costs.
