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© Sealevel Systems, Inc. 3543 Manual | SL9119 9/2022
Introduction
The
SIO4-104.485
, Item Number 3543, is a PC/104 module that provides four, RS-422/485 serial interface
ports. The board is designed using the XR16C554 UART, which provides a 16-byte FIFO.
In addition to the standard XR16C554 UART, the XR16C854 (‘SE’ option) and the OX16C954 (‘SN’ option)
are available. Both UARTS feature enhanced FIFOs (128 byte transmit and receive), and both maintain
compatibility with the XR16C554. The OX16C954 additionally features a flexible clock prescalar (from 1 to
31.875), 9-bit protocol, and an isochronous mode.
RS-422 provides excellent communications for long distance device connections up to 4000 ft., 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).
The
SIO4-104.485
is designed to be used with a variety of Operating Systems including Windows
98/NT/ME/2000/XP, Linux, and DOS. The SeaCOM API (Application Programmer Interface) available for
the
SIO4-104.485
provides a variety of useful high-level function calls implemented as a Windows dynamic
link library (DLL) and as a Linux kernel module and library. In addition to the API, SeaCOM includes sample
code and utilities to simplify software development.
Other Sealevel PC104 Serial Interface Products
•
ULTRA SIO-104
(Item Number 3550)
- Single Port RS-422/485
•
SIO-104
(Item Number 3551)
- Single Port RS-232
•
SIO.104+2
(Item Number 3502)
- Dual Port RS-232/422/485
•
C4-104.ULTRA
(Item Number 3540)
- Four Port RS-232/422/485
•
SIO4-104.232
(Item Number 3542)
- Four Port RS-232
•
SIO4-104.2+2
(Item Number 3544)
- Two Port RS-232 / Two Port 422/485
