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Part# 3440

(Ultra COMM+422)

ISA 4-Port RS-422, RS-485 Serial Interface


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THIS PRODUCT IS OBSOLETE DUE TO LACK OF COMPONENT AVAILABILITY. PLEASE CONTACT YOUR SALES REPRESENTATIVE FOR FURTHER INFORMATION AND NEW PRODUCT ALTERNATIVES.

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The 3440 ISA serial interface card provides four RS-422 or RS-485 ports. This board features extended interrupt support, individually selectable or sharable interrupts and an on-board interrupt status port for maximum Windows flexibility.
Host Interface(s) ISA
# of Ports 4
Electrical Interface RS-422, RS-485
UART Series 550 UART
Serial Connector(s) DB9M
Communications Chip 16550
Max Data Rate 460.8K bps
Max Data Distance 4000 feet
RS-485 Operation Full Duplex (4 wire), Half Duplex (2 wire)
Operating Temperature 0 - +70C
Storage Temperature -50 - +105C
Humidity Range 10 - 90% Relative Humidity, Non-Condensing
  • • 16-bit addressing eliminates I/O conflicts
  • • Selectable termination, echo mode and two or four wire operation
  • • Selectable and shareable IRQ level (2-5, 7, 10-12 and 15)
  • • On-board interrupt status port for Windows flexibility
  • • Included cable with four DB9M connectors provides TD, RD, RTS and CTS






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