Teknor Industrial Computers TEK-AT4LVG Technical Reference Manual page 104

Serial Port 2 (J7) RS-232
The Serial Port 2 can be configured as RS-232 or RS-485. 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. The following tables show their pinouts:
TABLE 9-2a: Serial Port 2 (J7) RS-232 - Pinout
Pin Number
Signal Flow
Signal
DCD I
RX I
TX O
DTR O
GND -
TABLE 9-2b: IBM 9-Pin DSUB Standard - Pinout
Pin Number
Signal Flow
Signal
DCD I
TX I
GND -
RTS O
RI I
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 use of Taïwanese
adapter cables is not recommended, since the pinout is often incorrect. The direct crimp
design offered by TEKNOR allows the simplest cable assembly. All these cables are
available from TEKNOR by contacting the Sales department.
Pin Number
Signal Flow
Signal
1 2 I DSR
3 4 O RTS
5 6 I CTS
7 8 I RI
9 10 - Not Used
Pin Number
Signal Flow
Signal
1 2 I RX
3 4 O DTR
5 6 I DSR
7 8 I CTS
9
Installing Peripherals 9-5