• Flexibility: Two or four asynchronous ports. Optional 16650 or 16750 UARTS are used to control each port.
  • Adaptability: SLIMs offer choice of RS-232, RS-422/485, RS-423 and/or 20 mA Current Loop electrical interfaces on the same board.
  • Speed: Each port can be configured independently to achieve data communications speeds up to 460.8 Kbps.
  • User Definability: IRQ lines are jumper selectable.

Important Notice:
All DFlex/Fast products are now End of Life (EOL) due to the EOL of critical components used in the manufacture of these products and the inability to source a suitable replacement. Although we may have limited stock still available, we strongly urge you to contact our sales team for your recommended replacement at [email protected], 1-800-426-8979 or 1-519-836-1291. For more information please follow this link.

Part #: DFAT02650XX, DFAT02750XX, DFAT04650XX, DFAT04750XX Category: Tags: , ,

More Information

The DFlex/Fast is designed for flexibility and speed in one cost-effective package. Available in two and four port densities, the user has the advantage of using Serial Line Interface Modules to customize the DFlex/Fast to suit the various I/O electrical interface requirements of their particular application. High speed data transmissions and a number of configurable options make it the ideal connectivity solution for your data collection, control and automation needs.



DFlex-2: 2
DFlex-4: 4

Electrical Interfaces

20mA Current Loop, RS-232, RS-422/485, RS-423


2 port model: DB-9 connectors, 4 port model: DB-9 or DB-25 male cable or connector box

Control Signals

20mA: TxD, RxD (active or passive), RS-232: RTS, DTR, TxD, DCD, CTS, RxD, RS-422/485: TxD+/-, RxD+/-, RTS+/-, CTS+/-, RS-423: TxD+/-, RxD+/-, CTS+/-, RTS+/-

Baud Rate

50 bps – 460.8 Kbps

I/O Addresses

Eight pre-defined sets of I/O addresses are DIP switch selectable – requires one set of eight addresses


Jumper selectable for IRQs 3, 4, 5, 7, 10, 11, 12, 15


16450, 16550, 16650 or 16750 UARTs with 16 to 64 bye TxD/RxD FIFO buffers


Height: 9.90cm; Length: 16.00cm; Width: 1.40cm

Power Requirements

DFlex-2: 0.7 amps
DFlex-4: 0.9 amps

Operating Temperature

+10°C to +60°C (+50°F to +140°F)

Storage Temperature

-60°C to +100°C (-76°F to +212°F)


5% – 90% non-condensing

Regulatory Approvals

FCC Class A
EN55022 Class A


ISA bus compatible 8-bit or 16-bit slot

Operating System

DOS, Linux, QNX, SCO Unix, Solaris, Windows

System Requirements

One half slot and available hardware interrupt(s).

Downloads for DFlex/ISA

Downloads support:

DFlex: DAT02450XX, DAT02550XX, DAT02650XX, DAT02750XX, DAT04450XX, DAT04550XX, DAT04650XX, DAT04750XX, DAT08450XX, DAT08550XX, DAT08650XX, DAT08750XX, DAT08450IOB2, DAT08550IOB2, DAT08650IOB2, DAT08750IOB2, D4104654XX

DFlex/Fast: DFAT02650XX, DFAT02750XX, DFAT04650XX, DFAT04750XX

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