December 2008 - Issue 12 Vol. 7
    

Test your knowledge with Tom’s monthly trivia question.
Question:
Why did Hammond Electric Organs that were made for the US sound flat when played in England?



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First 10 correct responses
win Sealevel stuff.

LAST MONTH"S TRIVIA
Question:
Who was the Cook County Assessor’s office clerk in "The Blues Brothers?"

Answer:
Steven Spielberg

 


Suffering from USB disconnection?



Sealevel’s First PCI Express Digital I/O Board
PCI Express Digital I/O Board

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.


USB Bus-Powered Digital I/O Adapter
USB Digital Interface Adapter

Control and monitor 16 optically isolated inputs and 16 Reed relay outputs via any USB connection with the 8221.

  • Input range is 5-30VDC, while the long-life Reed relays are well suited to low current applications
  • Inputs and outputs are grouped into four-bit segments for easy wiring via removable 3.5mm terminal blocks
  • High-retention USB Type B connector prevents accidental disconnection of USB cable

Read about the 8221 USB to 16 isolated inputs and 16 Reed relay outputs digital I/O adapter.


Tech Lowdown – Can I use Sealevel reed relay cards to switch other relays or inductive loads?

Sealevel Digital I/O products with reed relays are not designed to switch inductive loads such as the coil on another relay. If you need to switch an inductive load, Sealevel recommends using a Digital I/O product with Form C relays instead. You should remember to place a diode parallel to the coil to suppress the inductive kickback voltage. Failing to install a diode will shorten the life of the relay contacts.

 

PCI RS-232 Serial Interface

PCI RS-232 Serial Interface
The 7104S PCI serial interface provides maximum reliability in data intensive applications.

  • One RS-232 serial port
  • 16C850 UART with 128-byte Tx/Rx FIFOs
  • Supports data rates to 460.8K bps
Configurable Solid-State Industrial Computer

Configurable Solid-State Industrial Computer
The R2500, designed for harsh environments, offers exceptional performance and flexible I/O.

  • Up to 1.4GHz Intel Pentium M processor
  • Expand with up to three PC/104 kits
  • CDRW/DVD optional
PCI Digital Interface

PCI Digital Interface
Connect 8 Reed relay outputs (SPST) and 8 optically isolated inputs with the 8012S PCI digital interface.

  • Socketed dip resistor allows user configurable input range up to +24V
  • Universal bus (3.3V and 5V) compatible
  • Power (+5V and +12V) and ground provided on connector
Embedded USB to RS-232, RS-422, RS-485 Software Configurable DB9 Serial Interface Adapter

Embedded USB to RS-232, RS-422, RS-485 Software Configurable DB9 Serial Interface Adapter
The 2228 is a dual-port embedded USB to multi-interface serial adapter intended for mounting directly to a computer chassis.

  • All configuration and electrical selections are handle through the driver
  • Two ports each individually configurable for RS-232, RS-422, RS-485
  • High-speed UART with 128-byte Tx FIFO and 384-Byte Rx FIFO
Ethernet Modbus TCP to 32 Reed Relay Outputs

Ethernet Modbus TCP to 32 Reed Relay Outputs
The SeaI/O 440E provides 32 SPST Form A dry contact Reed relays for long life performance and fast response time.

  • Each relay can switch up to 60VDC @ 500mA
  • Removable screw terminals
  • Powered from your 9-30VDC source

 

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Visit sealevel.com for synchronous or asynchronous serial, analog or digital I/O, industrial computers or touchscreen HMI systems.