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7903 3U Compact PCI RS-232, RS-422, RS-485 Isolated Serial Interface
7903 3U Compact PCI RS-232, RS-422, RS-485 Isolated Serial Interface

Part# 7903

(ISO COMM2.cPCI)

3U Compact PCI 2-Port RS-232, RS-422, RS-485 Isolated Serial Interface


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This product is classified as legacy and is not recommended for new or high volume designs.

Sealevel will support legacy products through technical and warranty support, software drivers and product manuals. Please contact Sales for further information. For new product designs, we recommend the 7203e.

The 7903 is a 3U Compact PCI interface adapter with two isolated serial I/O ports. It provides two field selectable RS-232, RS-422, or RS-485 serial ports supporting data rates up to 921.6K bps. Isolation is important in installations where the equipment connected to the PC is either located far from the host system, or on a different power transformer circuit.

For user's that require custom baud rates, isochronous communications, or 9-bit protocol, the 7903 compact PCI serial interface is available with the Oxford 16C950 UART. Call for details.

Note: This item has a minimum order quantity (MOQ) of 25 units. Please contact your sales representative with any questions.
Host Interface(s) Compact PCI
# of Ports 2
Electrical Interface RS-232, RS-422, RS-485
Optically Isolated Yes
UART Series 850 UART
Serial Connector(s) DB9M
Communications Chip 16C850
Max Data Rate 921.6K bps
Max Data Distance 4000 feet
Operating Temperature 0 - +70C
Storage Temperature -50 - +105C
Humidity Range 10 - 90% Relative Humidity, Non-Condensing
  • • Hot Swap compliant (PICMG 2.1 Rev. 3.0)
  • • PCI bus 2.2 compliant
  • • Automatic RS-485 Enable and Disable
  • • Supports data rates up to 921.6K bps
  • • 16850 buffered UART standard
  • • Universal 3.3 and 5V compatible
  • • Full RS-232 control signals supported






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