Impulse 7804 - Manual

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8 Port PCI Serial
Item #
The Ultra COMM+8.PCI is a multi‑interface, eight port,
Universal Bus (3.3V or 5V) compatible PCI adapter. Offering
eight individual field‑selectable RS‑232, RS‑422, or RS‑485
channels, the Ultra COMM+8.PCI delivers ultimate flexibility
for expanding serial communications.
The Ultra COMM+8.PCI supports standard PC data rates
and boasts a top speed of 921.6K bps. The board is
designed using the XR16C864 UART, which provides a
128‑byte FIFO, eight times larger than boards designed with
16C550 compatible parts. The larger buffers allow error
free operation even in high‑speed applications. In RS‑485
mode the board provides automatic control of the RS‑485
driver enable for trouble free network master arbitration.
Additionally, RS‑485 network termination, critical to robust
multi‑drop communication, can be selectively added to the
circuit via DIP‑switches.
Unique Features
Each port individually configurable for RS‑232, RS‑422,
or RS‑485
16C864 buffered UARTs with 128‑byte FIFOs
Data rates to 921.6K bps
Universal Bus (3.3V and 5V) compatible
Automatic RS‑485 enable/disable
36’ cable terminates to eight DB‑9M connectors
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Technical Specifications
Number of Ports 8
Communications Chip 16C864
Max Data Rate 921.6K bps
Max Data Distance 4000 feet
Operating Temperature 0 ‑ +70° C
Storage Temperature ‑50° ‑ +105° C
Humidity Range 10 ‑ 90% R.H.
PCI RS‑232, RS‑422, RS‑485 Serial Interface
7804