An under-specified industrial PC can derail an otherwise flawless installation, costing time, money and reputation. The good news? With the right upfront questions, you can avoid these pitfalls and ensure your computing hardware performs exactly as expected.
Here are the five most important questions to ask when specifying an industrial PC for your project.
1. What is the operating environment?
Industrial PCs don’t live in comfortable offices. They live in substations, tunnels, mine sites and factory floors. Heat, dust, vibration and moisture are the enemies.
A fan-cooled office PC might last months in a substation switchyard before failing from dust ingress combined with condensation. A sealed fanless PC, however, can operate for 10+ years in the same environment with no moving parts to clog.
Define the environmental conditions in detail, including operating temp range, humidity, dust, airflow, condensation, shock and vibration profile. Don’t assume “industrial” means it can survive anything. Work through the environmental details carefully or speak to one of our engineers for support.
2. What performance and software support is really needed?
It’s easy to overspec — or worse, underspec — performance. The key is to tie computing power and resources to the expected workload. Consider CPU performance, RAM, storage, operating system and drivers.
A PC used only for data logging may need minimal CPU power but large, reliable storage. A PC running SCADA with HMI visualisation would require far more CPU and GPU resources, plus higher RAM.
Always ask what software must run, what OS it requires, and what are the recommended system requirements for that software, considering any future expected increases in workload or storage. A mismatch here can send you back to the drawing board.
3. What I/O and connectivity will keep the project running?
Connectivity is where many projects get caught out. Get the ports wrong, and integration halts.
A water treatment project may still rely on RS-485 serial links to interface with legacy controllers. Meanwhile, a smart-grid project may demand dual redundant Gigabit Ethernet plus cellular failover.
Map every required connection—USB, serial, Ethernet, WiFi, cellular, even audio and keyboard/mouse/monitor connections — before selecting hardware. A missing port usually means a redesign, not a quick fix.
4. What form factor and mounting is needed?
Form factor is more than an afterthought. It dictates whether the PC will actually fit and survive in its intended location.
In a roadside traffic cabinet, space is tight and airflow is poor. A compact, fanless low power DIN-rail PC avoids overheating and vibration failures. In a control room, a rackmount chassis may be the smarter choice for processing power and expandability.
Consider PC size, form factor, mounting method (panel mount / DIN rail / rack mount etc), and whether fanless cooling is needed. Choosing the wrong form factor often means expensive cabinet rework later.
5. What power supply conditions must be accounted for?
Power is often the invisible failure point of industrial PCs. Ignore it at your peril. From incorrect assumptions to unexpected lightning surges, power supply issues are one of the most common causes of failure we see at ESIS.
For example, in remote solar-powered telemetry stations, every watt matters. A PC drawing 50W instead of 20W can mean the difference between reliable uptime and repeated outages.
Clarify if the site provides AC or DC, what range of voltage the supply may present, and whether surge protection or UPS backup is required. Design for the weakest power scenario you might face. Don’t forget any power supply unit must be also designed for the same site conditions.
Other important considerations
While these five questions cover the essentials, there are several other factors worth considering:
- Redundancy and error checking: If the application is critical, consider redundant storage (RAID), error checking memory, and a redundant power supply connection.
- Remote unattended operation and maintenance: For systems installed in hard-to-reach or unmanned locations, remote health monitoring, watchdog timers and remote management capabilities are crucial.
- Operating system security updates: If the PC will have internet connectivity, reliable security patches are critical. Ensure the OS you select has long term serviceability without risky feature updates, for example Windows 11 IoT Enterprise LTSC.
- Lifecycle and availability: Can you still buy the same model five years from now, or will it be discontinued in 12 months?
- Industry certifications: Does the PC need IEC, MIL-STD, or rail compliance to pass audits?
- Service and customisation: Will you need custom BIOS, pre-imaging or local support?
Specifying an industrial PC is less about browsing a catalogue and more about asking the right questions. By clarifying environment, performance, connectivity, form factor and power requirements from the outset, you’ll save time, avoid costly missteps and deliver a system that runs reliably for years.
At ESIS, our engineers help integrators and project managers answer these questions every day. Just send us your project requirements, and we’ll recommend the right hardware to suit.
Have a project on the horizon? Send us your requirements today.
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.
