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Installing Peripherals
8.2.2 SERIAL PORT 2 (J7)
By default the Serial Port 2 is set as RS-232. In this configuration, it functions the same way
as Serial Port 1, with the same pinout. However, the Serial Port 2 may be set for RS-422/RS-
485 operations, using the BIOS Setup program.
RS-232 Mode
As a RS-232 port, and with the IBM 9-pin DSUB Standard, Serial Port 2 is 100%
compatible with the IBM-AT serial port. To output RS-232 signals from the 10-pin
onboard connector to a 9-pin DSUB connector, please refer to the following diagram:
Onb oard
10-pin Header
1
2
Pin 1
Fem ale
9
10
10-pin Header
I/O
Pin #
Pin #
Signal
I
D CD
1
I
R X
3
O
T X
5
O
D T R
7
-
G N D
9
1 0
O n b o a rd S e ria l P o rt C o n ne c to r
TEKNOR offers a 10-pin header to 9-pin DSUB cable for IBM-AT compatibility. This can
be purchased from TEKNOR or a cable can be made with a flat cable, a 10-pin flat cable
crimp header and a 9-pin DSUB flat cable crimp connector. The direct crimp design
offered by TEKNOR allows the simplest cable assembly. All these cables are available
from TEKNOR by contacting the Sales department.
R S-232 Serial P ort Flat C ab le (150-019)
I/O
Signal
2
D S R
I
4
RT S
O
6
C T S
I
8
R I
I
N .C .
-
8-3
18''
Cut W ire #10
I/O
Pin #
Pin #
Signal
I
D S R
6
1
O
RT S
7
2
I
C T S
8
3
I
R I
9
4
5
9 -pin M a le D S U B C on n e c to r a cc o rd in g to IB M -AT sta n da rd
1
6
9
5
I/O
Signal
D CD
I
R X
I
T X
O
D T R
O
G n d
-
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