Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers - Manual (Page 72)

Publication 1762-UM001G-EN-P - March 2011
4-6 Communication Connections
We recommend using an AIC+, catalog number 1761-NET-AIC, as your
optical isolator. See page 4-13 for specific AIC+ cabling information.
Isolated Modem Connection
Using an AIC+ to isolate the modem is illustrated below.
(1) Series C or higher cables are required.
For additional information on connections using the AIC+, refer to the
Advanced Interface Converter (AIC+) User Manual, publication
1761-UM004.
TERM A B COM SHLD CHS GND TX
TX PWR
TX
DC SOURCE CABLE
EXTERNAL
Modem Cable
(straight-through)
Personal Computer
Modem
Optical Isolator
(recommended)
Modem
MicroLogix 1200
Channel 0
Protocol Options
•
DF1 Full-duplex protocol (to 1 controller)
•
DF1 Half-duplex protocol (to multiple controllers)
•
Modbus RTU Slave protocol
TERM A B COM SHLD
CHS GND
TX
TX PWR
TX
DC SOURCE
CABLE
EXTERNAL
1761-CBL-AM00 or 1761-CBL-HM02
(1)
User-supplied modem cable
Modem
MicroLogix 1200
Channel 0 24V dc
MicroLogix 1200 provides power to the AIC+ or an external power
supply may be used. See Appendix F, System Loading and Heat
Dissipation.