Relio R2-Sync

Relio R2-Sync-i7Relio R2-Sync-i3Relio R2-Sync-AT


Relio R2-Sync - Intel 3rd Gen. Core i7/i3/Atom 4-port Configurable MIL-STD-810G Synchronous Serial Server with 16GB DDR3 memory and dual Gigabit Ethernet

Wide Voltage

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.


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).


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.


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.

FCC Approved

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.


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.

Relio R2-Sync synchronous serial server
Relio R2-SyncRelio R2-Sync
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Relio R2-Sync-i7

Relio R2-Sync with Intel Core i7-3517UE 1.7GHz processor and 16GB DDR3 memory

Relio R2-Sync-i3

Relio R2-Sync with Intel Core i3-3217UE 1.6GHz processor and 16GB DDR3 memory

Relio R2-Sync-AT

Relio R2-Sync with Intel Atom N2800 1.8GHz processor and 4GB DDR3 memory


DB25 Female to DB25 Male Extension Cable, 72" in Length


DB25 Female (RS-530) to DB37 Male (RS-449 DTE) Cable, 10" in Length


DB25 Female to DB25 Male Twisted Pair Serial Cable, 72" in Length


DB25 Female (RS-530) to DB15 Male (X.21) Cable, 72" in Length


DB25 Female (V.35) to ITU-T ISO-2593 Style Connector (V.35) Cable, 72" in Length


Terminal Block Kit - TB04 + CA104 Cable


Terminal Block Kit - DB25 Female to 25 Screw Terminals, 6" Snap Track & DIN-rail Mounting Clips

* 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)
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Relio R2-Sync overview

  • Compact, rugged enclosure with powder-coated finish
  • Silent solid-state design with no fans or other moving parts
  • COM Express Type 6 Module supports Intel 3rd. Gen Core i7/i3/Atom processors
  • Up to 16GB DDR3 system memory
  • Internal 2.5" drive bay
  • 1x DisplayPort
  • 4x RS-232/422/485/530/530A/V.35 synchronous serial ports
  • Dual Gigabit Ethernet ports
  • 2x USB2.0 ports
  • Internal Mini PCI-Express (half-size) slot supports optional wireless interface and other expansion modules
  • 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
  • CA339-ROHS molex 100-pin to 4x DB25 cable, mounting brackets and power supply included as standard
The Relio R2 Sync Server is a rugged, solid-state industrial computer designed for applications requiring synchronous communications, small size, high reliability, powerful processing and a long product life cycle.

The Relio R2 Sync Server combines powerful processing with robust synchronous communications that are perfect for radar, satellite, and other military applications. The system is compliant with MIL-STD-810 shock and vibration specifications.

The R2 Sync Server features four synchronous serial ports using the popular Zilog Z85230 ESCC. Each synchronous channel is individually configurable for RS-232/422/485/530/530A or V.35. In RS-232 mode, all common modem control signals are implemented for compatibility with a wide range of peripherals. Each port is capable of data rates to 128K bps in burst mode and each port includes a digital phase lock loop (DPLL).

Software support, critical for successful synchronous communication development, is provided through Sealevel's SeaMAC V5 synchronous serial driver. HDLC/SDLC protocols are supported as well as certain configurations of Monosync, Bi-sync, and Raw modes.

The R2 Sync Server is fanless and has a choice of processor options including 3rd Gen. Intel Core-i7/i3 and Atom. Up to 16GB DDR3 memory is supported on core versions, operating with low power over an operating temperature range of 0°C to +50°C. Impulse can offer preloaded 64-bit versions of Microsoft Windows or Linux operating systems on the included 64GB mSATA solid-state disk (SSD).

For easy implementation, a fan-out cable is included that terminates the system's 100-pin SCSI-style connector to four DB-25M connectors. Terminal blocks, adapter cables other helpful accessories are available to simplify installation. Included brackets allow for versatile mounting to walls, under counters or on tabletops.

Building on the advantages of COM Express architecture, the R2 Sync Server provides a long product life cycle and can be easily customised to match your specific I/O requirements. If you have application specific requirements, call today to discuss a Impulse custom COM Express solution.

Impulse is the exclusive UK distributor of Sealevel products and can supply you the Relio R2 along with a wide range of industrial computing and communication products.

For more information about the Relio R2 synchronous serial server please contact our technical sales team on +44 (0)1782 337 800, or alternatively submit an enquiry.
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Simon P.
The brief we gave to Impulse was technically challenging and made harder by the timeframe which we set them to deliver a solution. The end result exceeded our expectations in terms of the solution's specification, performance and delivery date for the Albeego Pinion.
Sep 2021
+44(0)1782 337 800