Rockwell Automation 1770-KF3 DH-485 Communication Interface User Manual - Manual (Page 19)

Installing the KF3
Chapter 2
2Ć11
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 Computer
1
TXD 2
RXD 3
RTS 4
3 RXD
2 TXD
5 CTS
Shield
4 RTS
7 GND
20 DTR
6 DSR
8 DCD
CTS 5
GND 7
DSR 6
DCD 8
DTR 20
Figure 2.16
Connection to IBM Computer with Handshake Signals (9 pin)
KF3 Computer
1
TXD 2
RXD 3
RTS 4
2 RXD
3 TXD
8 CTS
Shield
7 RTS
5 GND
4 DTR
6 DSR
1 DCD
CTS 5
GND 7
DSR 6
DCD 8
DTR 20