Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers - Manual (Page 73)

Publication 1762-UM001G-EN-P - March 2011
Communication Connections 4-7
Construct Your Own Modem Cable
If you construct your own modem cable, the maximum cable length is
15.24 m (50 ft) with a 25-pin or 9-pin connector. Refer to the following typical
pinout for constructing a straight-through cable:
Construct Your Own Null Modem Cable
If you construct your own null modem cable, the maximum cable length is
15.24 m (50 ft) with a 25-pin or 9-pin connector. Refer to the following typical
pinout:
DTE Device
(AIC+,
MicroLogix,
SLC, PLC) DCE Device
(Modem,
PanelView)
9-Pin 25-Pin 9-Pin
3 TXD TXD 2 3
2 RXD RXD 3 2
5 GND GND 7 5
1 DCD DCD 8 1
4 DTR DTR 20 4
6 DSR DSR 6 6
8 CTS CTS 5 8
7 RTS RTS 4 7
DTE Device
(AIC+,
MicroLogix,
SLC, PLC) DCE Device
(Modem,
PanelView)
9-Pin 25-Pin 9-Pin
3 TXD TXD 2 3
2 RXD RXD 3 2
5 GND GND 7 5
1 DCD DCD 8 1
4 DTR DTR 20 4
6 DSR DSR 6 6
8 CTS CTS 5 8
7 RTS RTS 4 7