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© Sealevel Systems, Inc. 7103 Manual | SL9161 7/2021
Introduction
The Sealevel Systems
ULTRA COMM+I.PCI
is a single channel isolated PCI Bus serial I/O adapter for the
PC and compatibles. Utilizing the Exar 16C850 UART with its industry leading 128 byte FIFOs, it provides a
field selectable RS-232/422/485 serial port supporting data rates up to 460.8K bps (RS-422/485).
Configure as RS-232 for standard serial COM: port requirements. Choose the RS-422 mode for long
distance device connections up to 5000ft. where noise immunity and high data integrity are essential.
Select RS-485 and capture data from multiple peripherals in a RS-485 multidrop network. Up to 31 RS-485
devices can be connected to each port to automate your data collection. You can even mix the ports in any
of the interface combinations to provide maximum flexibility to your application.
Optional Terminal Block
adapters are available to simplify field-wiring connections
.
In both RS-232 and RS-422 modes, the card works seamlessly with the standard operating system serial
driver. In RS-485 mode, our special auto-enable feature allows the RS-485 ports to be viewed by the
operating system as a COM: port. This allows the standard COM: driver to be utilized for RS-485
communications. Our on-board hardware automatically handles the RS-485 driver enable.