Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers - Manual (Page 71)

Publication 1762-UM001G-EN-P - March 2011
Communication Connections 4-5
Make a DF1 Point-to-Point Connection
You can connect the MicroLogix 1200 programmable controller to your
personal computer using a serial cable (1761-CBL-PM02) from your personal
computer’s serial port to the controller via Channel 0 and/or the
Programmer/HMI Port (for 1762-LxxxxxR only). The recommended
protocol for this configuration is DF1 Full-duplex.
We recommend using an Advanced Interface Converter (AIC+), catalog
number 1761-NET-AIC, as your optical isolator, as shown on the following
page. See page 4-13 for specific AIC+ cabling information.
(1) Series C or higher cables are required.
Use a Modem
You can use modems to connect a personal computer to one MicroLogix 1200
controller (using DF1 Full-duplex protocol), to multiple controllers (using
DF1 Half-duplex protocol), or Modbus RTU Slave protocol via Channel 0, as
shown in the following illustration. (See Appendix E for information on types
of modems you can use with the micro controllers.
TERM A B COM SHLD CHS GND
TX
TX PWR
TX
DC SOURCE
CABLE
EXTERNAL
1761-CBL-AM00 or 1761-CBL-HM02
(1)
1747-CP3 or 1761-CBL-AC00
MicroLogix 1200
Channel 0 or Programmer/HMI Port
24V dc
MicroLogix 1200 provides power to the AIC+ or an
external power supply may be used.
Personal Computer
IMPORTANT
Do not attempt to use DH-485 protocol through
modems under any circumstance.