| Primary Function | Integrated industrial computer with a built-in display and touch interface | Runs visualization, monitoring, control, data collection, and supervisory software from one enclosed unit. | The computer and display should be selected as a matched system for the required operating temperature, enclosure rating, and software workload. |
| Input Power | Commonly 24 VDC nominal; allowable input range varies by design | A DC power circuit converts the incoming plant supply into regulated voltages for the processor, memory, storage, display, and interface electronics. | Use a properly sized, protected power supply. Check the manufacturer’s voltage range, polarity, grounding, surge protection, and inrush-current requirements. |
| Power Consumption | Typically about 20–150 W, depending on processor, display size, storage, and peripherals | Lower-power systems support HMI and data tasks, while higher-power configurations handle more demanding visualization, analytics, or edge workloads. | Calculate heat dissipation and backup-power capacity from the actual operating load rather than the nominal input voltage alone. |
| Processing | Industrial x86 or ARM processor with solid-state memory and system RAM | The CPU executes the operating system and application logic, while RAM holds active data and solid-state storage retains software, logs, and configuration files. | Select processing capacity according to application cycle time, number of data sources, graphics requirements, and future software updates. |
| Real-Time Behavior | Deterministic performance depends on the operating system, software architecture, and communication method | The panel PC can display and process live machine data, but hard real-time control generally requires a real-time operating system, dedicated controller, or motion-control hardware. | Do not assume that a general-purpose desktop operating system provides guaranteed microsecond-level response. |
| Display | Common diagonal sizes range from approximately 7 to 24 inches; resolutions vary by model | The display presents process values, alarms, trends, recipes, diagnostics, and operator commands through a graphical interface. | Consider viewing distance, brightness, glove operation, sunlight readability, and the required aspect ratio before selecting the panel size. |
| Touch Interface | Projected-capacitive or resistive touch technology | Touch input is translated into cursor actions, button commands, parameter changes, or navigation events within the HMI application. | Projected capacitive touch is suitable for multi-touch and glass-front designs; resistive touch can be useful with gloves or pointed tools. |
| Machine Communication | Ethernet, serial interfaces, USB, and optional fieldbus or industrial network interfaces | Communication drivers exchange status, measurements, commands, and alarms with PLCs, controllers, drives, sensors, databases, and higher-level systems. | Verify protocol compatibility, connector type, network topology, bandwidth, isolation, and cybersecurity requirements. |
| Common Protocols | Examples include Modbus TCP, Modbus RTU, OPC UA, MQTT, and vendor-neutral industrial Ethernet protocols | Software drivers map machine data into readable tags or variables that can be displayed, logged, analyzed, or passed to other systems. | Protocol availability is application-dependent. Confirm licensing, data-update rates, time synchronization, and required gateway hardware. |
| Data Logging | Local storage may include industrial solid-state drives or embedded flash memory | The system records process values, alarms, operator actions, production counts, and maintenance information for analysis and traceability. | Use write-endurance calculations, scheduled backups, log-retention policies, and recovery procedures to reduce data-loss risk. |
| Operating Temperature | Industrial ranges commonly begin around 0–50°C, with rugged models extending beyond this range | The enclosure, cooling design, processor, storage, and display are selected to operate within the specified ambient temperature range. | Account for cabinet temperature, direct sunlight, internal heat sources, airflow, altitude, and condensation. |
| Cooling Method | Fanless conduction or passive cooling is common; forced-air cooling may be used for higher heat loads | Heat moves from electronic components to the enclosure or heatsink and then to the surrounding environment. | Fanless designs reduce moving parts and dust intake, while fan-cooled designs may support higher performance but require filter and maintenance planning. |
| Ingress Protection | Front-panel ratings such as IP65 are common; the complete system rating depends on the enclosure and installation | Sealed front bezels and gaskets help protect the display and controls from dust and water jets under specified test conditions. | An IP rating is not automatically a full-system rating. Cable glands, rear connectors, cabinet interfaces, and mounting hardware must also be sealed correctly. |
| Mounting Options | Panel mount, arm mount, wall mount, or VESA-compatible mounting | The computer is positioned near the operator or machine while maintaining access to power, communication, and service connections. | Check cutout dimensions, mounting depth, support strength, cable bend radius, vibration, and service clearance. |
| Electrical Protection | May include input fusing, reverse-polarity protection, overvoltage protection, and transient filtering | Protection circuits limit damage caused by wiring faults, supply disturbances, and electrical transients on the DC distribution system. | Protection features vary by model. Use external circuit protection and follow the applicable electrical installation standards. |
| Reliability Factors | Solid-state storage, reduced moving parts, industrial-rated components, and controlled thermal conditions | These design choices help the system operate continuously in environments with vibration, dust, electrical noise, and long service intervals. | Reliability depends on the whole installation, including power quality, grounding, temperature, vibration, software maintenance, and storage endurance. |
| Typical Applications | Machine HMI, production monitoring, test systems, building automation, logistics, and edge data collection | The panel PC combines local visualization and computing with direct access to machine and plant data. | Use a dedicated PLC, safety controller, or motion controller where certified safety or deterministic control functions are required. |
| Cybersecurity | Role-based access, network segmentation, secure updates, backups, and application hardening | Security controls reduce unauthorized access to machine interfaces, production data, and control-related applications. | Disable unused ports and services, control removable media, apply tested updates, and coordinate security practices with plant operations. |