Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 61)

Hardware
Connecting the System
3–3
20187
8-pin Mini Din
9-pin D-shell
5
4
3
2
1
9
8
7
6
1 2
3
4
5
6 7 8
1761-CBL-PM02 Series B Cable
8-Pin 9-Pin
9
7
6
5
4
3
2
1
8
RI
DCD
CTS
RTS
DSR
GND
DTR
TXD
RXD
GND 2
3
4
5
6
7
8
RTS
RXD
DCD
CTS
TXD
GND
24V 1
Programming Device Controller
Using a Modem
You can also use modems to connect a personal computer to one MicroLogix 1000
controller (using DF1 full-duplex protocol) or to multiple controllers (using DF1
half-duplex protocol), as shown in the illustration that follows. Do not attempt to
use DH-485 protocol through modems under any circumstance. (For information on
types of modems you can use with the micro controllers, see page D–9.)