Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 60)

Preface MicroLogix 1000 Programmable Controllers User Manual
3–2
Connecting the DF1 Protocol
There are two ways to connect the MicroLogix 1000 programmable controller to
your personal computer using the DF1 protocol: using an isolated point-to-point
connection, or using a modem. Descriptions of these methods follow.
Chassis ground, user 24V ground, and RS-232 ground are internally
connected. You must connect the chassis ground terminal screw to chassis
ground prior to connecting any devices. It is important that you understand
your personal computer’s grounding system before connecting to the
controller. An optical isolator is recommended between the controller and
your personal computer.
Making an Isolated Point-to-Point Connection
You can connect the MicroLogix 1000 programmable controller to your personal
computer using a serial cable from your personal computer’s serial port to the micro
controller.
1761-CBL-PM02
Micro Controller
Personal Computer
Optical Isolator
➀
(recommended)
➀ We recommend using an AIC+, catalog number 1761-NET-AIC, as your optical isolator. See page 3–11 for
specific AIC+ cabling information.