Allen-Bradley DH-485 User Manual page 19

If you are using handshake signals with your computer, use the connection
shown in Figure 2.15 or 2.16.
Figure 2.15
Connection to IBM Computer with Handshake Signals (25 pin)
KF3
1
TXD 2
RXD 3
RTS 4
CTS 5
GND 7
DSR 6
DCD 8
DTR 20
Figure 2.16
Connection to IBM Computer with Handshake Signals (9 pin)
KF3
1
TXD 2
RXD 3
RTS 4
CTS 5
GND 7
DSR 6
DCD 8
DTR 20
Chapter 2
Installing the KF3
Shield
Shield
Computer
3 RXD
2 TXD
5 CTS
4 RTS
7 GND
20 DTR
6 DSR
8 DCD
Computer
2 RXD
3 TXD
8 CTS
7 RTS
5 GND
4 DTR
6 DSR
1 DCD
2 11