Introduction
The Relio R4 is a solid-state 1U rackmount computer designed for applications requiring high reliability, I/O
expansion, scalable processing and a long product lifecycle. The R4’s fanless and cable-less structure
ensures extensive durability for long-term usage. The R4 differs from traditional industrial computer
systems in that it is built using the
PICMG COM Express architecture
. Sealevel has partnered with the
leading COM Express module manufacturers to ensure our customers benefit from the best in the industry.
This manual will focus on the higher level features of the R4 computer system.
The R4 is compatible with Basic and Compact form factor Type 6 pin out COM Express modules. COM
Express is a widely supported implementation of Computer on Module (COM) design. The COM Express
architecture reduces the complexity, cost and time required for custom computer system design by
combining the processing, memory, video, Ethernet and USB functionality in a small, highly-integrated
module. COM Express modules install on a carrier board that provides the application specific I/O and
external connectors best suited for the system requirements.
Sealevel COM Express carrier boards leverage the company’s years as a leader in I/O and communication
products to provide carrier board and full system solutions in the fastest time possible. Common I/O
features include serial, analog and digital I/O. Sealevel’s extensive library of proven I/O circuits can be
included as required to meet the specific I/O count, voltage ranges and connector types.
Features
The following features are included and installed on the Relio R4 models.
Fanless and Cable-less design
2 expansion slots for digital and analog SeaRAQ I/O modules
1 DisplayPort Compatible Video Output
2 Gigabit Ethernet Ports
2 RS-232 Serial Ports
1 RS-485 Serial Port
5 USB 2.0 Ports
1 Audio Line Input
1 Audio Line Output
Power and SATA Activity LED Indicators
Half-length PCI Express Mini Card Expansion
Accepts 1 removable 2.5” SATA Disk Drive
Supports Wake-on-LAN
18-36 VDC Input
©Sealevel Systems, Inc.
R4 Manual
4
SL9260 06/2015
