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1U Rackmount I/O Server Delivers Solid State Reliability

Author: Earle Foster
Date: 08/18/2014
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  • Space-saving 1U rackmount chassis
  • No internal cables or moving parts for ultimate reliability
  • Choice of Intel Atom, Core i3, or Core i7 processor
  • 5 USB 2.0 ports, 3 serial ports, DisplayPort video
  • 2 Gigabit Ethernet ports
  • Versatile serial, digital, and analog I/O expansion
  • Wide 0-50°C operating temperature range

LIBERTY, SC, USA – Sealevel Systems, Inc., announces the Relio R4 industrial computer designed for applications requiring flexible I/O configurations in a compact 1U rackmount design. Based on COM Express architecture, the system offers high reliability, scalable processing and a long product life cycle. Available with a choice of Intel dual-core Atom, Core i3 or Core i7 processor, the system is ideal for remote monitoring, test and measurement, and data acquisition applications.

The Relio R4 system is packed with standard I/O features including dual Gigabit Ethernet, five USB 2.0 ports, one RS-485 and two RS-232 serial ports, DisplayPort and VGA video. Two SeaRAQ™ I/O expansion slots are accessible through the rear of the enclosure that enable a variety of real-world analog I/O configurations such as A/D inputs, 0-20mA inputs, thermocouples, RTD inputs, and 4-20mA outputs. Optically isolated inputs, relay outputs and additional serial interfaces are also available.

The R4 system 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. The drive tray is externally accessible for easy field upgrades. The rackmount system is powered by external 18-36 VDC and is rated for a wide 0-50°C operating temperature range. Pricing for the Relio R4 starts at $1035 in small volume quantities and delivery is from stock.


Sealevel Systems, founded in 1986, provides industrial computing solutions in addition to a variety of communications and I/O products including PCI Express and PCI Bus cards, Ethernet serial servers, and USB serial adapters. The product line includes multi-port RS-232, RS-422/485, RS-232/422/485 multi-interface high-speed sync/async, and digital/relay I/O. For more information visit or call 864-843-4343.


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