Teknor Industrial Computers TEK-AT2 Hardware Reference Manual page 15

J4 COM2 CONNECTOR/RS485
PIN NUMBER
SIGNAL FLOW
SIGNAL
RESERVED -
RXD(-) I/O 3
TXD(-) O
NC O
GND I
SPECIFICATIONS 65
PIN NUMBER
SIGNAL FLOW
SIGNAL
1 2 I NC
4 I/O RXD(+)
5 6 I TXD(+)
7 8 I NC
9