Relio R4


Relio R4 - Intel 3rd Gen. Core i7/i3/Atom 19" 1U Rack-mount PC with up to 16GB DDR3 memory, Mini PCI-Express and two SeaRAQ I/O expansion slots
CE is a mandatory standard for products on the market in the European Economic Area. By CE marking a product, the manufacturer ensures that the item meets the essential safety requirements set out in the applicable CE directive.
This product fully adheres to the Restriction of Hazardous Substances Directive 2002/95/EC, RoHS for short.  The directive covers the restriction of use of certain hazardous substances in electrical and electronic equipment and was adopted in February 2003 by the European Union.
Underwriters Laboratories (UL) is an independent product safety certification organisation based in the United States. UL develops standards for products, materials, components, assemblies, tool and equipment, mainly dealing with product safety.
These products use heatsink, heatpipe and extrusion technology to dissipate the heat generated by the system rather than using traditional fans thus improving system reliability and longevity.
This product supports Linux based kernels. See product datasheet and manual for a list of compatible Linux kernels and distributions (for development and pre-sales support please contact our technical sales team).
These devices and systems have been designed to accept a wide voltage DC power input. This feature is desirable in the industrial market where a fixed voltage level or mains AC power cannot be guaranteed.
The Federal Communications Commission (FCC) is an independent agency of the United States government that sets standards and governs the testing of conducted and radiated emissions such as EMI.
Relio R4 1U rack PC
Relio R4Relio R4Relio R4
3 Relio R4 versions available

Add to quote list

Add the Relio R4 to your quote list to send to our sales team for a quote on all your chosen products
Version information
Lead time*
Add to quote list**
Relio R4-i7
Relio R4 with Intel Core i7-3517UE 1.7GHz processor and 16GB DDR3 memory
Relio R4-i3
Relio R4 with Intel Core i3-3217UE 1.6GHz processor and 16GB DDR3 memory
Relio R4-N2800
Relio R4 with Intel Atom N2800 1.8GHz processor and 4GB DDR3 memory
Peripheral information
Lead time*
Add to quote list**
SeaRAQ 8x Channel-to-Channel Isolated A/D Inputs Expansion Module
SeaRAQ 6x Isolated RTD Analog Inputs Expansion Module
SeaRAQ 6x Isolated Thermocouple Inputs (Type E, J, or K) Expansion Module
SeaRAQ 8x Channel Isolated 4-20 mA Current Loop Transmitter Outputs Expansion Module
SeaRAQ 16x Isolated Digital Inputs (3V to 30V DC) Expansion Module
SeaRAQ 16x Isolated Digital Inputs (0V to 132V AC) Expansion Module
SeaRAQ 16x Isolated Form A Relay Outputs Expansion Module
SeaRAQ 8x Isolated Form A Relay Outputs Expansion Module
DB9 Female to DB9 Male Extension Cable, 72" in Length
DB9 Female to DB9 Female Null Modem Cable, 10' in Length
Terminal Block - DB9 Female to 9 Screw Terminals
Terminal Block Kit - TB05 + CA127 Cable
DB9 Female to RJ45 Modular Adapter
DB9 Male to DB9 Female Low Profile Null Modem Adapter
* Lead time is indicative and is subject to change at time of ordering. Next business day delivery on in-stock products only (when ordered before 3pm).
** Contact us for quantity or project pricing.
† Additional delivery charge may be incurred for certain postcodes (calculated at checkout)

Relio R4 overview

  • 1U 19" rack-mount enclosure with powder-coated finish
  • Silent solid-state, fanless design with no moving parts
  • COM Express Type 6 Module supports Intel 3rd Gen. Core i7/i3/Atom processors
  • Up to 16GB DDR3 system memory
  • Removable 2.5" solid-state disk (SSD) drive is perfect for rugged applications
  • 1x DisplayPort
  • 1x RS-485 and 2x RS-232 ports
  • Dual Gigabit Ethernet ports
  • 5x USB2.0 ports
  • 2x SeaRAQ expansion slots for optional analog, digital and serial I/O
  • 1x Mini PCI Express expansion slot
  • Integrated graphics supporting DirectX and OpenGL 3.x
  • Supports ACPI power management
  • Supports Windows or Linux operating systems
  • Wide 18V to 36V DC power input
  • 0°C to +50°C operating temperature
The Relio R4 is a fanless, solid-state 1U rackmount computer with no internal cables. The system is ideal for rugged applications that demand high reliability, I/O expansion, scalable processing and a long product life cycle.

The R4 builds upon the advantages of the COM Express architecture and features your choice of Intel dual-core processor (Atom N2800 1.8GHz; Core i3 1.6GHz; Core i7 1.7GHz) and up to 16GB RAM. The rackmount system requires low power consumption while operating fanless over an operating temperature range of 0°C to +50°C.

A wealth of standard I/O features include dual Gigabit Ethernet, five USB2.0 ports, three serial ports, DisplayPort video and audio interfaces. The R4 operates with no moving parts or internal cables, eliminating the most common causes of failure.

Featuring two SeaRAQ I/O expansion slots, the Relio R4 offers extra expansion capabilities and supports a variety of real-world analog I/O configurations such as A/D inputs, 4-20mA outputs, 0-20mA inputs, thermocouples and RTD inputs. Optically isolated inputs, relay outputs and additional serial interfaces are also available.

The Relio R4 operates from your choice of 2.5" SATA solid-state disk (SSD) that can be integrated and preloaded with 32-bit or 64-bit versions of Microsoft Windows or Linux operating systems. Operating from solid-state disk, the system is perfect for industrial and commercial rackmount environments including process control, test & measurement and HMI applications.

Impulse is the exclusive UK distributor of Sealevel products and can supply you the Relio R4 along with a wide range of industrial computing and communication products.

For more information about the Relio R4 1U rack PC please contact our technical sales team on +44 (0)1782 337 800, or alternatively submit an enquiry.
Enquire about the Relio R4
Need more info or project pricing for the Relio R4?
T: +44 (0)1782 337 800 • E: SALES@IMPULSE-EMBEDDED.CO.UK
We want you to be the first to know about new products, technology solutions and exclusive industry news. To stay connected and receive marketing communications, select YES. (Remember, you are free to unsubscribe at any time.)

This rack computer built to order
We build all of our rack computers in our integration facility to your exact specification. Talk to us about a custom build.
Enquire now
Privately brand your computer
For a complete OEM look we can build computers in any RAL colour and privately label your machine, without affecting product certifications.
Send enquiry
Quality, reliable, and repeatable system builds
We build all of our industrial computers in our purpose built integration facility where we follow procedures and processes honed over the last 25 years to ensure quality, reliability and repeatability.
Enquire now
Your Favourites
Wherever you see this heart symbol around the site, you can click to add things like products, articles and more to your favourites.
Build a quote list
Are you after more than one product, or need quantity pricing? Add products to your quote list and send it through to our team in one go!