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© Sealevel Systems, Inc. 3502 Manual | SL9116 9/2022
Technical Description
The SIO-104+2 series provides the ultimate serial connection for your PC/104 application. SIO-104+2
utilizes the 16850 UART. These chip features programmable baud rates, data format, interrupt control and
128-Byte input and output FIFOs.
The SIO-104+2 when configured with the RS-422/485 interface will allow long length, high-speed
communications suitable for data collection and shop floor control.
The SIO-104+2 when configured with the RS-232C interface, is fully compatible with the DOS operating
system, all popular modem software, network operating systems software, and mouse drivers.
Features
•
Selectable interrupts (IRQs) 3, 4, 5, 7, 9, 10, 11, 12, 15
•
Multiple adapters can share the same IRQ
•
Uses PC/104 compatible stack through connector for universal mounting
•
5 volts only DC operation
Connector Pin Assignments
RS-232
Signal
Name
J1/J2
DB-9
Mode
GND
Ground
9
5
TD
Transmit Data
5
3
Output
RTS
Request To Send
4
7
Output
DTR
Data Terminal Ready
7
4
Output
RD
Receive Data
3
2
Input
CTS
Clear To Send
6
8
Input
DSR
Data Set Ready
2
6
Input
CD
Carrier Detect
1
1
Input
RI
Ring Indicator
8
9
Input
These assignments meet EIA/TIA/ANSI-574 DTE for DB-9 type connectors
