When panel PCs fail on site, the cost is far greater than a replacement unit. Delays, repeat site visits, overtime labour, integration rework and stakeholder frustration all add up quickly.
In sectors such as water and wastewater, utilities, transport, mining and defence, choosing the wrong panel PC can compromise project delivery and credibility.
Here are five common and preventable mistakes that can lead to early failure, costly support issues and project risk.
1. Standard RAM and SSD in high-temp environments
Many panel PCs are installed where ambient temperatures exceed 50°C, such as treatment plants, roadside cabinets, pump stations, chemical areas or enclosed kiosks. Standard industrial or commercial-grade RAM and SSDs are not designed for these conditions and can cause severe performance issues as soon as the temperature reaches a tipping point. Regular usage at high temperatures can also degrade the components over time, resulting in eventual failure.
Why it causes issues: standard industrial components are often only rated from 0°C to 70°C. However inside a fanless industrial PC running in a 50°C environment, the RAM and SSD can get significantly hotter than this, due to internal heat generation from the CPU and the SSD. Over-temperature SSDs may thermally throttle performance or appear to “lock up” the system. Exposure to heat accelerates wear, causing data corruption, random lock-ups, short operational life or complete failure.
What to do instead: specify industrial-grade wide temp RAM and SSDs rated from -40°C to +85°C to ensure stability, longer lifespan and consistent performance in demanding environments.
2. Power mismatch or unstable supply
One of the most common causes of panel PC failure is connecting a 12 V DC unit directly to a 24 V DC supply, or to a power source with significant voltage ripple or spikes.
This can result in burnt components, random reboots, data loss, or total failure. Units are often returned under warranty when the true cause was incorrect or unstable power.
Prevention measures:
- Confirm the panel PC’s voltage input range.
- If there is any uncertainty, select a wide-range (for example 9–36 V DC) model or select the wide range input option.
- Use power conditioning or isolated DC-DC conversion on noisy or unstable supplies.
3. Misunderstanding IP ratings
A panel PC rated IP65 from the front only protects the display surface against water jets and dust. It does not mean the entire unit is sealed. The rear housing, connectors and vents are typically not waterproof.
Where this causes failure: installations where the rear or sides are exposed to weather, washdown, high dust or moisture. Water ingress and corrosion can occur through connectors or the housing.
How to avoid this:
- Confirm whether the IP rating applies to the front only or the complete enclosure.
- For fully exposed sites, specify an IP66 or IP67 fully sealed panel PC.
- Where the rear is not sealed, install within a suitable enclosure that allows heat dissipation.
4. Wrong touchscreen type for the environment
Project teams often select projected capacitive (PCAP) touchscreens because they are modern and responsive. However, PCAP is not suitable when operators wear gloves or when the screen surface may be wet, dusty or oily.
Where it causes issues: operators cannot reliably use the HMI, leading to workflow delays and frustration.
Better approach:
- Resistive touchscreens are more suitable for industrial sites where gloves, stylus use or contaminants are expected.
- PCAP suits clean indoor control rooms or offices where touch precision and gestures are required.
5. Not allowing for mounting, cabling and service space
A panel PC that looks suitable on paper can fail during installation if physical clearance, cable routing or servicing access is overlooked.
Common problems include interference behind the panel, insufficient depth for cables, inadequate space for connectors, poor airflow, and no space to replace components without removing the entire unit. Another common mistake is to purchase a panel PC that requires rear access for securing the mounting, where the actual location does not have access from the rear (such as a wall cutout).
Prevention measures:
- Confirm mounting type early (panel mount, VESA, arm, enclosure, vehicle mount).
- Check dimensions including depth, cable clearance and access for servicing.
- Consider heat dissipation and airflow requirements, and allow plenty of space.
- Where rear access is not possible, be sure to specify a model that can be panel mounted entirely from the front.
Choosing the right panel PC for harsh environments is not just a technical decision — it has direct impact on project delivery, site reliability, lifecycle cost and stakeholder confidence. By avoiding these common pitfalls early, you can help prevent costly rework, safeguard uptime and ensure your system performs as expected in the field.
If you’d like support choosing a panel PC for your operating environment, we can help.
• For project leads: get our engineers’ recommendation tailored to your site conditions and application.
• For engineers and technicians: ask for our practical selection and installation notes to streamline commissioning and avoid rework.
For advice or a fast, accurate recommendation, contact ESIS and we’ll guide you to the right fit every time.
ESIS Industrial Electronics offers a range of industrial computing solutions, including rugged tablets, data loggers, industrial displays, integrated computing platforms and programmable interfaces for direct PLC integration. Talk to us about solutions to keep your business operations running efficiently.
