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June 2009 - Issue 6 Vol. 8

Celebrate Sealevel’s 23rd birthday this month and play Tom’s Trivia for Sealevel Stuff & iPods!

What unique method does Sealevel use to identify a RoHS compliant vs. non-RoHS compliant printed circuit board?

Click here if button does not work

What 8080 instruction took the longest time to execute (clock cycles) and was often used in timing delay loops to basically "waste time"? What did this instruction do and why did it take so long?

The XTHL instruction took the longest time to execute and was often used in timing delay loops. This instruction exchanged top of stack with HL registers. It had to read two memory bytes from external memory and swap them with two bytes in the internal HL register, thus requiring 18 clock cycles to complete.


SBC-R9 ARM9 RISC Single Board Computer

Fanless Core 2 Duo Power for Industrial Computing

Fanless Core 2 Duo Power for Industrial ComputingThe Relio R5000 dual-core industrial computer is designed for CPU-intensive applications in industrial environments. Available with a fanless 2.16GHz Intel® Core™2 Duo processor and up to 4GB RAM, the R5000 offers industry-leading solid-state performance suitable for a wide range of industrial applications.

Features include:
  • Fanless 2.16GHz Intel Core 2 Duo processor
  • One PCI Express and one PCI expansion slot
  • Six USB 2.0 ports, dual Gigabit Ethernet, and four serial ports
  • SATA interface for high-speed Solid-State Disk (SSD) or hard drive

With your operating system and application running from solid-state disk or CompactFlash, the R5000 provides the ultimate in reliability — no moving parts.


Learn more about Sealevel’s green initiativesIn recognition of World Environment Day on June 5, Sealevel partnered with Mokugift to plant trees in honor of its customers and to provide them with a sustainable gift that helps fight global warming. The eco-program encourages customers to take advantage of paperless publications, such as Sealevel’s monthly e-newsletter. Sealevel will plant almost 2,500 trees this summer. Learn more about Sealevel’s green initiatives.


Tech Lowdown
R5000 with Easily Accessible Expansion

R5000 with Easily Accessible ExpansionSystem designers can easily customize the I/O features of the R5000 using the system’s PCI Express and PCI bus expansion slots. To access the expansion slots, use a Phillips head screwdriver to remove three screws from the side panel. Remove the side panel to reveal a PCI Express X4 slot and a PCI slot. The optional 2.5” solid-state disk (or hard drive) bay and an SO-DIMM slot can be accessed as well. In this example, the side panel has been removed to reveal a PCI Express digital I/O card (Item# 8004e) and a PCI 4-port synchronous serial card (Item# 5402). A metal bracket and thumbscrew hold expansion cards securely in place even in high-vibration environments.

For more information about the flexibility of the R5000, please visit our website.


ARM9 Embedded RISC Computer

R9 ARM9 Embedded RISC Computers
The Relio R9 is an application-ready platform for your next product design.

  • Based on the 200MIPS Atmel AT91SAM9263™ microcontroller boasting a 32-bit ARM® instruction set
  • Up to 256MB RAM and 256MB Flash memory
Synchronous Serial Radio Adapter

Synchronous Serial Radio Adapter
Synchronous serial radio adapter 9065 from Sealevel and free software from the Defense Information Systems Agency (DISA) provides an improvement in the speed and reliability of battlefield communications.

  • Enables tactical radios to send data such as GPS maps, images, coordinates, and IM-type communications
  • Works with any radio that has a synchronous communication port
  • Uses MIL-STD-188-184
Ethernet to RS-232, RS-422, RS-485 Serial Server

Ethernet to RS-232, RS-422, RS-485 Serial Server
The 4203 Ethernet to serial server is the easiest way to connect RS-232, RS-422, or RS-485 serial devices to your Ethernet network.

  • Uses industry standard RFC 2217 TCP/IP protocol for maximizing compatibility
  • Each port individually configurable for RS-232, RS-422, or RS-485
  • Automatic RS-485 enable/disable
Embedded USB I/O

Embedded USB I/O
2223-KT iPortholes™ modules provide serial and digital I/O solutions in the Sealevel Porthole footprint for easy mounting in a Relio industrial computer or your custom enclosure.

  • Software configurable interface supports RS-232, RS-422, and RS-485
  • iPorthole design is perfect for expanding industrial computing platforms using only an internal USB connection
USB to 4 Optically Isolated Inputs / 4 Form C Relay Outputs

USB to 4 Isolated Inputs / 4 Form C Relay Outputs
The SeaDAC Lite 8112 can control and monitor up to four optically isolated inputs and four Form C relay outputs via any USB connection.

  • Removable 3.5mm screw terminal blocks simplify field wiring
  • Status LEDs display I/O activity and USB connection
  • Powered by USB connection
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Visit for synchronous or asynchronous serial, analog or digital I/O, industrial computers or touchscreen HMI systems.