Compulab has announced its new fitlet2 ultra-compact PC designed for a broad range of applications, including office, IoT and industrial. The Compulab fitlet2 is a small unit, cooled passively using its own chassis made of die-cast metal. The system supports Compulab’s function and connectivity extension T-cards (FACET cards) that add functionality, such as extra GbE or USB ports, or even a 4G modem.

The Compulab fitlet2 measures 112 mm by 84 mm, meaning that it is smaller than Intel’s NUCs and other UCFF-class PCs. Depending on exact model, the Compulab fitlet2 can be based on Intel’s Atom x7-E3950, Atom x5-E3930 or a Celeron J3455, all based on Intel's Apollo Lake cores. The motherboard of the system features one SO-DIMM slot for up to 16 GB og DDR3L-1866 memory. As for storage options, the mainboard supports M.2-2260/2242 SSDs, modular M.2 eMMC drives as well as 2.5” SATA storage solutions. One M.2 module and one 2.5" drive can be installed at the same time.

By default, the Compulab fitlet2 system comes with two GbE ports, two USB 3.0 connectors, two USB 2.0 headers, a COM port, audio jacks, a microSD slot, an HDMI 1.4, and an mDP 1.2 output. Users can install one of Compulab’s FACET cards to get other connectivity features, including (but not limited to) a 802.11ac Wi-Fi + Bluetooth 4.2 module, a 4G modem, two extra GbE ports, four additional USB headers, or an M.2 E-key slot. Compulab keeps the FACET spec open so interested parties can develop their own cards to extend I/O capabilities and address certain needs, such as FPGAs perhaps. One thing that should be kept in mind is that Apollo Lake SoCs only support PCIe 2.0, so the fitlet2 will not be able to take advantage of fast I/O or modern SSDs.

As mentioned above, the fitlet2 can be adapted for various applications and for this reason different versions of the PC will use slightly different enclosures. The low power models use 112 mm by 84 mm housing that is 25mm thick, while a higher performance SKU is 34 mm thick (to dissipate more heat), and industrial designs come in a 112x112x25 mm chassis because of mounting mechanisms.

All versions of the fitlet2 are rated to operate in rather extreme environments with temperatures between -40°C and 85°C and humidity between 5% and 95% (non-condensing).

Brief Specifications of Compulab's fitlet2
  Atom x7 Atom x5 Celeron
CPU Atom x7-E3950
1.6 GHz / 2.0 GHz
2 MB L2
12 W
Atom x5-E3930
1.3 GHz / 1.8 GHz
2 MB L2
6.5 W
Celeron J3455
1.5 GHz / 2.3 GHz
2 MB L2
10 W
PCH integrated
Graphics HD Graphics 505
(18 EUs)
Intel HD Graphics 500
(12 EUs)
Memory One SO-DIMM slot, up to 16 GB of DDR3L-1866
Storage eMCC A modular eMMC storage device
M.2 A SATA SSD in M.2-2260/M.2-2242 form-factor
2.5" A SATA 2.5" SSD or HDD
Wi-Fi Intel 802.11ac + BT 4.2 (optional, comes on a FACET module)
Ethernet Two Gigabit Ethernet with RJ45 connectors (Intel i211)
Two additional GbE connectors may be installed using a FACET module
Display Outputs 1 × HDMI 1.4
1 × mDP 1.2
Audio 3.5 mm audio in and audio out (Realtek ALC886)
USB 2 × USB 3.0 Type-A
2 × USB 2.0 Type-A
Four additional USB 2.0 connectors may be installed using a FACET module
Dimensions Low-power: 112 mm × 84 mm × 25 mm
High-performance: 112 mm × 84 mm × 34 mm
Industrial: 112 mm × 112 mm × 25 mm
PSU External, 9V to 36V
VESA Mounts 75 mm/100 mm
OS Windows 10 IoT Enterprise LTSB
Linux Mint
Compatible with other operating systems

Because the fitlet2 enables to build systems featuring different specifications, Compulab does not announce exact MSRPs for all the units, possibly because 99% of such PCs will be built-to-order (the manufacturer even offers color customization for large customers). The cheapest fitlet2 is available for $153, but once it is equipped according to requirements, its price will be considerably higher (keep in mind that industrial DIMMs and SSDs rated for extended temperatures cost more than consumer-class components). All fitlet2 computers are covered by a five-year warranty and are guaranteed to be available for 15 years.

Related Reading

Source: Compulab

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  • DanNeely - Thursday, November 9, 2017 - link

    What's the micro RS-232 port? Is it a proprietary dongle mount, or is that a reduced size standard I've just never seen before?
  • Compulab - Thursday, November 9, 2017 - link

    mini serial connector is common to all Compulab products (fit-PC / IPC / fitlet / Airtop).
    Compulab supplies an adapter cable from mini-serial to DB-9 male.
  • DanNeely - Thursday, November 9, 2017 - link

    Is the 15y availability guarantee backed by an Intel promise to keep the CPUs available for the next 15; or are they just assuming that they'll be able to make port equivalent replacements using whatever Intel and AMD do launch over the next decade and a half?
  • Compulab - Thursday, November 9, 2017 - link

    Backed by Intel.
    In IoT it is often not possible to hop to a new architecture due to SW compatibility, product re-certification overhead and segmentation of install-base.
    Future products will have their own independent longevity plan.
  • DanNeely - Thursday, November 9, 2017 - link

    Does Intel list which parts they're guaranteeing long term availability for? It doesn't appear to be listed for these CPUs in Ark.
  • Compulab - Thursday, November 9, 2017 - link

    The E39xx have longevity. J/N do not.
  • cerberusss - Thursday, November 9, 2017 - link

    This would be a nice little media PC, but it lacks HDMI 2.0.
  • PeachNCream - Thursday, November 9, 2017 - link

    HDMI 2.0 might need like a bridge chip to work with Apollo Lake. That's a really tiny motherboard so maybe there's just not any space left for another IC, traces, and whatever else. I'm clueless though -- what's HDMI 2.0 bring to the table that's critical for media work that 1.4 can't handle?
  • Wardrop - Thursday, November 9, 2017 - link

    4k @ 60fps. Any modern day MediaPC needs to support that. Even if you're not watching 4k content at 60fps, there's no doubt you'll be watching lower resolution stuff at 60fps which still needs to be output at 4k from PC to TV.
  • Compulab - Friday, November 10, 2017 - link

    fitlet2 supports 4K@60Hz through mini-DP.

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