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© Sealevel Systems, Inc. 3588 Manual | SL9008 9/2022
Introduction
The SIO-104+8.485, Item Number 3588, is a PC/104 serial interface module with eight 2-wire RS-485 serial
interface ports, supporting data rates up to 921.6K bps. The board is designed using a pair of 16C954
UARTs with 128-byte FIFOs. The 16C954 features a flexible clock prescalar (from 1 to 31.875), 9-bit
protocol support, and isochronous mode.
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). Optional terminal block adapters are available to
simplify field-wiring connections.
The SIO-104+8.485 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) included on CD
with the SIO-104+8.485 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 PC/104 Serial Products
Model No.
Part No.
Description
ULTRA SIO-104
(P/N 3550)
- 1 Port RS-422/485
SIO-104
(P/N 3551)
- 1 Port RS-232
SIO.104+2
(P/N 3502)
- 2 Port RS-232/422/485
C4-104.ULTRA
(P/N 3540)
- 4 Port RS-232/422/485
SIO4-104.232
(P/N 3542)
- 4 Port RS-232
SIO-104.485
(P/N 3543)
- 4 Port RS-422/485
SIO4-104.2+2
(P/N 3544)
- 2 Port RS-232 & 2 Port 422/485
