Fitlet 2 Industrial IOT Device

The fitlet2 has been designed with industrial IoT in mind. This state of the art, miniature, fan-less PC offers endless applications thanks to extension models.

Hardware features

  • Built around quad-core Apollo-Lake Atom processors with up to 16 GB of RAM, the fitlet2 offers impressive performance for its small size. Its processing power and speedy data communications make it ideal for a host of IoT applications, ranging from automotive to utility, industrial, retail and logistics, among others.
  • The miniature fitlet2 works like a building block – the modular design allows for interlocking parts to be clipped together as required. This also means it’s easy to disassemble for installation of RAM, storage and extension cards. The fitlet2 is one of the smallest full-featured PCs currently available and measures just 122mm x 84mm. Choose from the low-power model, which is only 25mm thick, or the performance model, which is 34mm thick.
  • The hardware and metal casing have been designed to keep the passively-cooled fitlet2’s size to a minimum while maximising its resilience, capabilities and thermal performance.

Extensions for every application

The fitlet2 is designed with the understanding that every IoT project is unique, which is why specific requirements of any application can be addressed through extension modules. These are integrated seamlessly into the fitlet2’s metal housing through the Function And Connectivity Extension T-Card (aka, the FACET-card).

A full suite of FACET-Cards is available to meet almost any need, including:

  • Extra Gbit Ethernet ports
  • Extra USB ports
  • 2.5″ SSD/HDD support
  • 4G LTE modem in conjunction with WiFi
  • Power-over-Ethernet device (PoE PD)

Storage support

Storage devices are attached to the fitlet2 by a specially designed M.2 cooling plate. This dispels heat through the casing.

Fitlet2 supports various storage technologies, including:

  • eMMC on an M.2 module, for price-sensitive applications
  • M.2 SATA, for performance and improved storage capacity
  • 2.5″ HDD/SSD, for additional storage and intensive write operations, such as video recording (Please note that the 2.5″ storage device requires a specific FACET-Card, as well as a raised bottom cover)

Networking versatility

fitlet2 offers versatile networking options through its dual Gbit Ethernet ports (Intel I211), which are the standard option. These can be extended to four ports if required.

fitlet2 also supports WiFi and 4G cellular modem working in conjunction.

Robust reliability

fitlet2 is designed for real-world applications, which means it needs to be resilient. It is, thanks to the proven fan-less cooling system that was first launched more than a decade ago and has been refined and improved ever since.

The fitlet2 can operate in a wide temperature range – from -40 to 85° C. It’s designed for efficient convection cooling, with its metal housing acting as an effective heatsink.

Furthermore, fitlet2 is resistant to shock, vibration, dust and humidity and requires virtually no maintenance. It’s reliability and silent operation make it suitable for challenging environments, including automotive, railway and industrial applications.

Warranty and durability

For peace of mind in any IoT project, reliability and durability are critical. The fitlet2 is renowned for both, which is why we offer an unconditional warranty on fitlet2.

The embedded grade fan-less design is built to last and effectively does not age. Fitlet2 availability is also 15 years, meaning that you don’t need to worry about redoing integration, adapting to new software or undertaking new certification following the first cycle. Refreshing is as simple as it gets.


Whether you need to mount the fitlet2 in a cabinet, a vehicle or carriage, or a vending machine, it’s quick and easy to secure. It can even be mounted behind a display, on a wall or to a piece of furniture or shop-fitting.

Two mounting options are available – VESA and DIN-rail mounting.

Power supply options

The fitlet2 operates at a broad input voltage range of between 9V and 36V. There is also the option of powering it with a PoE FACET-card or a custom FACET-Card.

To prevent unintentional power loss or being mistakenly pulled out, the DC-plug has a special twist-lock.

A range of auxiliary power solutions are also available for fitlet2, including:

  • fit-Uptime miniature UPS
  • Medical grade PSU
  • Pig-tail cable (Y-cable) with twist-lock DC plug

Fitlet2 Technical Specifications

CPU Options
Intel Atom x7-E3950 | Intel Atom x5-E3930 | Intel Celeron J3455 Other pin-compatible CPUs are available for large volume orders.

Up to 16GB 1x SO-DIMM 204-pin DDR3L Non-ECC DDR3L-1866 (1.35V)

M.2 M-key 2260* | 2242 (SATA 3 6 Gbps)
or eMMC
micro SD socket is also available.
External USB storage is supported.
Both are bootable.
* M.2 2280 optional on some FACET cards

Dual head
mini DP 1.2 4K @ 60 Hz
HDMI 1.4 4K @ 30 Hz

Up to 4x Gbit Ethernet Intel i211
2 GbE ports on-board + 2 additional ports on optional FC-LAN FACET card.
Wireless LAN*
802.11ac dual antenna + BT 4.2
Add-on M.2 E-key 2230 + 2x RP-SMA antennas.
User can install another Wireless LAN adapter.
* Optional
Cellular communication*
Cellular communication
Available using optional FACET card with either M.2 B-key or miniPCIe socket.
FACET has micro-SIM socket.
* Optional

Input / Output
Up to 8 ports
2x USB 3.0
Up to 6x USB 2.0
4 USB ports on-board + 4 additional ports on optional FC-4USB FACET card.
Stereo line-out
Stereo line-in / mic
7.1 S/PDIF out*
HDMI & DP audio
Realtek ALC1150 audio codec
* requires a 3.5mm to SMA cable (sold separately).
RS232 serial port* * Requires mini-serial to DB-9 adapter cable (sold separately).

Function and Connectivity Extension T-Card (FACET Card) interface

Available FACET-Cards
– dual Gbit Ethernet
– 4x USB 2.0
– miniPCIe + micro SIM + M.2 E-key + M.2 M-key 2280
– M.2 B-key + micro SIM + M.2 E-key + M.2 M-key 2280

FACET Card interface includes 2x PCIe, USB, eDP 1.3 and I2C.
Additional FACET cards are under development.
FACET Card interface is public with reference designs.
M.2 E-key socket* * Shared with FACET Card socket

AMI Aptio V
Operating systems
Windows 10 IoT Enterprise LTSB
Linux Mint
Compatible with other Windows 10 variants.
Compatible with other Linux variants.
Compatible with other hypervisors and operating systems (e.g. ESXi, FreeBSD)

Input voltage range
Up to DC 9V – 36V*
Power consumption
5W – 15W
Power consumption depends on:
– CPU type
– System load
– Installed devices
– Connected peripherals
* When ordered with extended input voltage range. Normal input voltage range DC 7V – 20V.

Temperature & Humidity
Operating temperature range
Up to -40°C to 85°C*
Relative humidity
5% – 95% non-condensing
* When ordered in industrial temperature range. Commercial and extended temperature range are also available.

Dimensions & Weight
Low power housing
112 mm X 84 mm X 25 mm
Performance housing
112 mm X 84 mm X 34 mm
Industrial housing
112 mm X 112 mm X 25 mm
350 gram
The user can easily change the housing type in the field.

Housing & Cooling
All metal housing
Aluminium | zinc die cast parts
Fanless convection cooling through the housing
No vents

VESA / wall mounting bracket*
DIN-rail mounting bracket*
* Sold separately

Functional Features
– Auto-on
– Programmable indicator LEDs
– Removable RTC battery
– Auxiliary power header
– RTC reset tactile switch
– Remote power button

Firmware & BIOS features
– PXE boot
– Wake-on-LAN
– Wake-on-timer

Mechanical features
– Kensington lock
– Power plug twist lock
– Mechanical disabling of power button

Download specification sheet

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