A very detailed equipment requirement list: x86, an Intel i5 processor, 4GB of memory, two video outputs, one RS232 serial port, fanless, and Windows 10 IoT Enterprise as the operating system. Whoever wrote the list had been running thin clients on Windows Embedded Standard 7 and wanted to move to hardware better suited to industry.
This kind of list is worth taking apart item by item. With a fanless industrial computer, the comparisons usually start with cooling method and ingress rating, yet that is rarely where a project gets stuck.
Processor and memory ask whether the application software installs at all. Serial ports and dual display ask whether the legacy equipment on site can be connected. Fanless construction and OS version ask whether the machine will still be behaving after five years in a cabinet.
WES7 is out of support and no longer receives security patches — that alone explains the migration.
Four differences, each of them useful only on fixed-purpose devices.
Update cadence.LTSC releases receive security updates only, with no feature updates, and whether or when they are installed is decided by whoever owns the device. The ordinary edition pushes feature updates down and restarts on its own; one overnight restart of a host machine, and the morning shift spends half a day working out what changed.
Lockdown.The Unified Write Filter (UWF) redirects writes to a temporary overlay, so a reboot returns the machine to its original state. Shell Launcher takes it straight into the line-of-business application with no desktop in sight. The keyboard filter blocks combinations such as Ctrl+Alt+Del. There are also USB device filtering, notification and dialog filtering, and AppLocker, which allows only approved programs to run. Together these are what turn a PC into a device that does one job. None of them changes the hardware; what changes is what the operating system allows to persist, and who is able to change it.
Lifecycle.Every LTSC release carries ten years of support: Windows 10 IoT Enterprise 2021 LTSC until January 2032, Windows 11 IoT Enterprise LTSC 2024 until 2034. Ten years is roughly the designed service life of the machine itself, so the OS cadence matches the hardware and nothing has to be recertified in between.
Licensing.The license travels with the device and is tiered by processor class.
Serial ports are the item most often under-counted at order time. The USR-EC300 has six of them: two switchable between RS232, RS485 and RS422, and four fixed RS232, all DB9. One more scanner or one more scale on site and a port is gone; adding expansion later costs more than leaving headroom at purchase.
Display outputs follow the monitors on site. The EC300 offers HDMI plus VGA with synchronous or asynchronous dual display, so a legacy VGA-only screen stays in service. The processor is an i5-7200U (2.5GHz, up to 3.1GHz, 2 cores, 4 threads), with 8GB DDR4 expandable to 32GB and 128GB of storage.
The remaining items decide whether it can stay powered on: all-aluminum fanless chassis, -20~60°C with a wide-temperature SSD, DC 12-36V wide input, a 255-level programmable watchdog, two gigabit Ethernet ports, 14 GPIO channels, and a 7×24 operating rating. None of them appears on a comparison sheet built around processor speed, which is why they tend to be checked last.
Pages from several industrial computer makers about fanless models stay on cooling and protection: the fan as the only moving part, passive conduction through the metal housing, washdown lines, metal dust, outdoor cabinets, IP65 and NEMA 4X, bearings failing first under vibration. All of that is true, and all of it answers whether the machine will break on site.
The other half of the list goes unaddressed: whether the software still looks the same in five years, whether there are enough serial ports, and whether a replacement exists once a model is discontinued. Those three are where PUSR concentrates.
Interface specifications follow the site, not the compute. Multiple serial ports with some switchable, HDMI plus VGA for legacy screens, GPIO straight through — count what is on site first, then look at the processor.
Two system lines. The EC series is x86 and ships with Windows preinstalled, Linux optional. The USR-EG628 and USR-EG528 are ARM, preloaded with Ubuntu and an edge computing platform running Node-RED and local SCADA. Where the software is not tied to Windows, there is no reason to pay for x86 capacity that goes unused.
Interchangeable models on one platform. The USR-EC100, USR-EC300 and USR-EC500 share the x86 platform industrial pc and differ by serial and Ethernet port count. When one model is tight on supply, a step up or down leaves the application software untouched. Both halves are needed: a machine that survives the environment but shifts underneath the application is only half specified.
Version and licensing go into the order: Windows IoT Enterprise or ordinary Windows, which LTSC release, license with the device or purchased separately. Product pages usually say only "Windows", so the version has to be asked about; a datasheet line that short rarely identifies an edition, and the difference surfaces after deployment.
Update policy first: who decides when patches are installed, whether they can be deferred, whether UWF should be enabled.
Copy the interface list from the site: serial type and count, display outputs, and what the legacy peripherals actually use.
Spare unit and image: burn the same-version image into the spare at acceptance, and keep the system disk separate from the data disk.
For an i5 with six serial ports, dual display and wide input, the USR-EC300. For tight spaces with only two serial devices, the USR-EC100: Celeron J6412, 2×RS232/RS485, 2×HDMI plus DP, DC 12V, 1.2kg, DIN-rail mounting. For seven or eight devices in one cabinet with five segmented network ports, the USR-EC500: i5-7200U, eight serial ports (four switchable), five Intel gigabit Ethernet ports, HDMI plus VGA.
Most projects match that opening list on the USR-EC300 — x86, i5, dual display, multiple serial ports, fanless, Windows preinstalled. A few get stuck on the OS version, and that item is not in the parameter table; it belongs in the order. When selecting a fanless industrial computer, the comparison tends to start with cooling and protection, and the difficulty turns out to be the version of Windows.
It is the most visible difference, not the only one. A fanless machine uses its enclosure as the heat sink, usually a single all-aluminum body with no intake openings, which removes one path for dust and moisture; with one fewer moving part, there is also one fewer failure point under sustained vibration. A fan-cooled machine handles higher-power processors, so its computing ceiling is higher, at the cost of intake openings that must stay clear and filters that need cleaning. The choice depends on dust and vibration on site, and on how much computing the software actually needs.
Pro targets general office work and keeps pushing feature updates. IoT Enterprise is built for fixed-purpose devices: the LTSC channel delivers security updates only, and whether they are installed is decided by the device owner. IoT Enterprise also includes a set of lockdown features — Unified Write Filter, Shell Launcher, keyboard and USB filtering, AppLocker — that Pro does not have. Lifecycle differs as well, with ten years of support per LTSC release.
New projects should look at Windows 11 IoT Enterprise LTSC 2024 first, supported until 2034. It requires TPM 2.0, though, and older platforms designed without that chip cannot move to it; those stay on Windows 10 IoT Enterprise 2021 LTSC (supported until January 2032) or go through a full hardware and software recertification before that date. When certified software is running on an older machine, migration costs more than expected and belongs in the project budget from the start.
Yes, provided the machine has real serial ports. A USB-to-serial adapter also shows up as a COM port in Device Manager, but the port number changes when it is unplugged, which breaks the software configuration, and reconnect behavior after a drop is less predictable than with ports on the board. Confirm that the serial ports are built in and terminated in DB9, and check how many there are and whether they switch between RS232 and RS485.
The EC series ships with Windows preinstalled, with Linux available as an option; the specific version is confirmed and written into the order at purchase time. Product pages generally say only "Windows" without the edition, and Windows IoT Enterprise is an OEM-licensed edition, so the preinstalled version and whether the license travels with the device need confirming with the supplier. Installing an OS independently is possible, but drivers and activation have to be solved as well, and production projects usually find it cheaper to freeze a golden image.
Count the devices on site, add headroom, then choose the model: six ports on the USR-EC300 (two switchable), eight on the USR-EC500. Where a machine is already installed and short of ports, adding a serial device server is an option — devices on an RS485 bus can be read over Ethernet without replacing the computer.
Enable Shell Launcher so the machine boots straight into the application, enable UWF so any change disappears on reboot, use the keyboard filter to block combinations that could break out of the session, and use AppLocker to limit what is allowed to run. The update policy is decided separately: security patches are deferred to a maintenance window and validated on a spare unit first.
Put the supply period into the request for quotation and confirm whether models on the same platform are interchangeable — the USR-EC100, USR-EC300 and USR-EC500 share the x86 platform and differ by port count, so a step up or down leaves the application untouched. The number of spares follows the cost of downtime: positions where an hour of stoppage is expensive justify one spare per unit. Burn the same-version image into the spare at acceptance so it is ready to swap in.
