Impulse 7804e - Manual (Page 3)

©Sealevel Systems, Inc.
SL9219 - 06/2011
7804e Manual 3
The Sealevel Ultra COMM+8.PCIe is an eight channel RS-232/485/422 PCI express Bus serial I/O
adapter supporting data rates up to 921.6Kbps.
The RS-232 compatibility allows for connection to devices utilizing the RS-232 electrical
interface, such as modems, data-entry terminals, and plotters.
RS-422 provides excellent communications for long distance device connections up to 4000ft.,
where noise immunity and high data integrity are essential.
RS-485 is optimized for „Multi-Drop‟ or „Party-line‟ operations selecting data from multiple
peripherals (as many as 31 devices can be connected on an RS-485 bus).
In both RS-485 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.
The Ultra COMM+8.PCIe will operate on x1, x4, x8 or x16 PCIe bus slots.
 Each port individually configurable for RS-232, RS-422, or RS-485
 16C954 buffered UARTs with 128-byte FIFOs
 Oscillator and clock prescalar support wide range of baud rates
 Supports 9-bit protocol framing
 Each port supports data rates to 921.6K bps
 RS-485 line termination, pull-up and pull-down resistors for each port are selectable via
dipswitch
 RS-485 ECHO can be enabled/disabled via
dipswitch
 PCI Express X1 compliant
 Compatible with all standard size PCI Express
slots
 All modem control signals implemented in RS-
232 mode
 Automatic RS-485 enable/disable in hardware
 Included 36" cable terminates to eight DB9M connectors (Item# CA145)