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July 2009 - Issue 7 Vol. 8
Test your knowledge with Tom’s monthly trivia question.

Memphis-based Ardent Recording Studios, recording home to ZZ Top, George Thorogood, REM, and countless others was formed by three tenth graders in the 1960s. One of the three dropped out of the recording business and went on to form another company. Who was this person and what was the company he founded?

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

During separate manufacturing processes, compliant boards will have a solder mark on the “RoHS” pad, while noncompliant boards will have a solder mark on the “non-RoHS” pad.


Fanless Core™2 Duo Solid-State Computers

Digital PCI Express Board Named Editor’s Choice

Digital PCI Express Board Named Editor’s Choice Named a June 2009 Editor’s Choice pick by VME and Critical Systems magazine, the 8004e PCI Express X1 digital I/O interface provides 16 optically isolated inputs and 16 Reed relay outputs.
  • Optically isolated inputs protect the PC from voltage spikes commonly found in industrial environments
  • The Reed relays provide long-life, dry contact switch closures that are suitable for low current applications
  • Reed relays are normally open and close when energized

Read about the 8004e (rated for 3-13V input) and the 8004He (rated for 10-30V input) PCI Express digital I/O adapters.

Low Profile PCIe Interface with Two Ports & Wide Range of Baud Rates

Low Profile PCIe Interface with Two Ports & Wide Range of Baud RatesThe low-profile PCI Express serial interface (Item# 7205e) provides two configurable serial ports that utilize a 16C950 UART with 128-byte Tx/Rx FIFOs, which enables data rates to 921.6K bps for reliable high-speed communications in data-intensive applications. Each port is individually configurable for RS-232, RS-422, or RS-485.

  • Oscillator and clock prescaler support wide range of baud rates
  • Supports 9-bit protocol framing and data rates to 921.6K bps
  • Includes a 36” cable with two DB9M connectors

Read about the low profile 7205e and the standard size 7205eS.

Tech Lowdown
PCI Express: Lanes Explained

PCI Express cards communicate with the host processor using two pairs (one transmit, one receive) of low voltage serial signal connections called “lanes”. The connection from the host processor to a PCIe peripheral, the “link”, can consist of a single lane (X1) or up to 32 lanes (X32). Common questions involving compatibility between devices with different lane sizes are: “Can I use a Sealevel PCIe X1 serial card in a PCIe X16 slot?” and “Will a PCIe X16 video card work in a PCIe X4 location?” The PCI Express specification was designed with compatibility in mind, so each of these scenarios is supported:

  • A PCIe expansion card will work in any slot with at least as many lanes as it contains. So, X1 cards will work in any PCI Express slots.

  • An expansion card with a larger number of lanes will work in an expansion slot with a smaller number of lanes provided it fits mechanically. In this case the expansion card will throttle back to the number of lanes supported by the expansion slot, so the performance will decrease. Adapters are available to help accommodate this configuration.

Fanless Core™2 Duo Solid-State Computers

Fanless Core™2 Duo Solid-State Computers
The Relio R5000 dual-core industrial computer is designed for CPU-intensive applications in industrial environments.

  • 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
Data Acquisition Expansion Modules

16 Form C Relay Output SeaI/O Expansion Module
Easily add 16 Form C relay outputs to your SeaI/O network with the 450N.
Compatible with all SeaI/O base units (Ethernet, USB, RS-485, RS-232)

  • Cabling is accomplished via the unit's RJ45 connector or removable screw terminals
  • RS-485 line conditioning allows easy installation of termination and pull-up/pull-down resistors
USB to Isolated RS-232 DB25 Serial Interface Adapter

USB to Isolated RS-232 DB25 Serial Interface Adapter
The 2103 provides a single RS-232 serial port to any computer with an available USB port.

  • Optical Isolation provides protection against transients and ground loops
  • Data rates to 460.8K bps
  • USB bus powered
USB to 16 Isolated Inputs / 16 Reed Relay Outputs Digital Interface Adapter

USB Digital I/O
The 8221 can control and monitor 16 optically isolated inputs and 16 Reed relay outputs via any USB connection.

  • High-retention USB Type B connector prevents accidental disconnection of USB cable
  • Powered by USB connection
  • Removable screw terminals simplify field wiring
USB to 4 Optically Isolated Inputs / 4 Form C Relay Outputs

15” LCD TFT Flat Panel Computer
The SeaPAC S1200-15RX combines the Relio R1200 embedded computer with a 15” resistive touchscreen monitor perfect for a variety of control and HMI applications.

  • Embedded 1.0GHz ULV Intel Celeron CPU
  • Solid-state operation via CompactFlash memory
  • Stainless steel display rated for NEMA 4X environments
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