Siemens SIMATIC TIWAY 1 User Manual page 63

CONFIGURING THE HOST COMPUTER PORT
The IBM PC/ATr uses a 9-pin "D" connector for its serial interface port. A null
modem cable diagram for the IBM PC/AT port is shown in Figure 3–5.
RI
CTS
RTS
DSR
Figure 3–5 IBM PC/AT 9-Pin Null Modem Cable Diagram
IBM PC/AT 9–Pin UNILINK Host Adapter 25–Pin
5 GND
9
TxD
DTR
SD
RxD
RD
RTS
CTS
1 DCD
6
DSR
GND
DCD
3–5
1
25
14
13
UNILINK HOST ADAPTER
USER MANUAL