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© Sealevel Systems, Inc. 7106e Manual | SL9268 11/2022
Technical Description
The Sealevel Systems 7106e provides a PCIe interface adapter with 1 asynchronous serial port providing a
versatile, field selectable RS-232 interface for modems, printers, and plotters, as well as RS-422/485/530
for industrial automation and control applications.
The 7106e provides a UART with a 256 byte TX and RX FIFOs, providing programmable baud rates, data
format, and interrupt control.
DB25 Male Connector Pin Assignments
Pin#
RS-232
RS-422/485/530
Pin#
RS-232
RS-422/485/530
1
N/C
N/C
14
–
TX+ (O)
2
TD (O)
TX– (O)
15
–
–
3
RD (I)
RX– (I)
16
–
RX+ (I)
4
RTS (O)
RTS– (O)
17
–
–
5
CTS (I)
CTS– (I)
18
N/C
N/C
6
DSR (I)
DSR– (I)
19
–
RTS+ (O)
7
GND
GND
20
DTR (O)
DTR– (O)
8
DCD (I)
DCD– (I)
21
–
RI– (I)
9
–
–
22
RI (I)
DSR+ (I)
10
–
DCD+ (I)
23
–
DTR+ (O)
11
–
–
24
–
–
12
–
–
25
–
RI+ (I)
13
–
CTS+ (I)
“N/C” = Not Connected (unused)
“–” = Reserved
(I) = Input
(O) = Output
