Industrial PC – choosing a box PC, panel PC or rack PC

When is an ordinary office PC not enough?

An office PC is built for 20–25 °C, clean rooms and eight hours a day. Models change every few months. In a factory, a vehicle or a substation it often becomes the weak link – and every new model means new drivers, a new system image and new validation.

You probably need an industrial PC if any of these apply:

• The computer has to run 24/7, year after year.
• The temperature can drop below 0 °C or rise above 35 °C, for example in a control cabinet, a cold store or outdoors.
• There is dust, fibre, oil mist or moisture in the air.
• The computer is exposed to vibration and shock, as on a machine or in a vehicle.
• You need serial ports, isolated digital I/O, CAN or many network ports.
• The same model must be available for every new machine in a series for several years.

Box PC, panel PC or rack PC – what is the difference?

The form factor decides where the computer sits and how it is used. A box PC is the most flexible. A panel PC suits operators working at the machine. A rack PC belongs where 19-inch racks already exist and where performance, drives or expansion cards matter most.

Fanless cooling and temperature range

A fanless computer conducts heat from the processor to cooling fins on the chassis. There are no fans to draw in dust or wear out, and the computer is completely silent. That is why most industrial box PCs and panel PCs are fanless.

Read the temperature range carefully. It is often stated for a certain processor power, for example “−20 to 70 °C with a 35 W CPU”. With a more powerful processor the limit may be lower, and in high heat the processor lowers its clock speed to protect itself. Remember also that the air inside a control cabinet is often much warmer than the room. Cold works the other way: at −40 °C some screens and drives need a built-in heater to start.

I/O, expansion and storage

Start with what the computer must connect to. An industrial PC often has several network ports, some with PoE for cameras, serial ports for RS-232/422/485, isolated digital I/O and sometimes CAN. M.2 and Mini PCIe slots are used for 4G/5G and Wi-Fi. Frame grabbers, motion control cards or an AI graphics card need real PCIe slots and a computer that can handle the power.

Storage is a common source of failures. Industrial SSDs handle a wider temperature range, have power-loss protection and a fixed bill of materials, so the same drive is delivered year after year. SLC and pSLC types withstand far more writes than ordinary TLC drives. To reduce wear further, you can use a write filter in the operating system, such as the Unified Write Filter in Windows IoT.

Life cycle and operating system

A machine is often sold for many years. You then want to buy the same computer, or a compatible successor, throughout that period. Industrial manufacturers choose components with long-term availability and give advance notice when something changes or is discontinued. Ask about planned availability.

The same thinking applies to software. Windows IoT Enterprise LTSC receives security updates for ten years, without feature updates that change the system. Windows 11 IoT Enterprise LTSC 2024 is supported until October 2034. Linux, such as an Ubuntu LTS release, is a common alternative. Check that drivers are available for the system you choose.

Where are industrial PCs used?

• Factory and process – machine control, SCADA and MES terminals, machine vision with PoE cameras.
• Food and pharma – stainless steel IP69K panel PCs that withstand high-pressure washdown.
• Vehicles and mobile machines – driver terminals in forklifts, forestry machines and buses, with ignition control and CAN.
• Rail – EN 50155 computers for passenger information, video surveillance and diagnostics.
• Energy and infrastructure – rack PCs and gateways in substations, water treatment plants and tunnels.
• Medical technology – computers and panel PCs certified to IEC 60601-1 near the patient.
• Defence – rugged servers and consoles tested to MIL-STD-810.

Five common mistakes

1. Measuring the room temperature. What counts is the air around the computer. In a closed cabinet with variable speed drives it can be far above room temperature.
2. An ordinary SSD. Consumer drives lack power-loss protection and can be swapped for a different model without notice.
3. Forgetting the power supply. Voltage dips, spikes and power cuts are common in industry and vehicles. Choose the right input voltage and plan for a controlled shutdown.
4. No life-cycle plan. If the model is discontinued after a year, you have to revalidate the whole machine.
5. Too little headroom. An extra network port, a free M.2 slot or a PCIe slot costs little today but can save a new computer in a few years.

Industrial PCs from SCN

We supply box PCs, panel PCs and rack PCs from brands such as Arbor Technology, Winmate, Axiomtek and Systerra – from small DIN-rail computers to rugged servers. In the categories you can filter by temperature range, screen size, IP rating and interfaces.

Examples from our range

Frequently asked questions

What is the difference between an industrial PC and an ordinary PC?

An industrial PC is built for 24/7 operation over a wider temperature range, withstands dust and vibration and stays available in the same configuration for longer.

What does fanless mean?

That heat is conducted away through the chassis instead of by fans. The computer is silent, does not draw in dust and has no moving parts to wear out.

Can an industrial PC run Windows 11?

Yes. The most common choice is Windows 11 IoT Enterprise LTSC, which receives security updates for ten years. Many models can also run Linux.

What is a DIN-rail PC?

A compact box PC that clips onto the same DIN rail as the other equipment in the control cabinet. It is often powered from 24 V DC.