Vision™ OPLC™
Unitronics
9
RS232 to RS485 Jumper Settings
The figure to the right shows the
jumper factory default settings,
RS232, RS485 termination ON.
Note that in order:
To change the
communication setting to
RS485, both communication
standard jumpers must be
moved
To change the RS485
termination, both
termination jumpers must
be moved
To access the jumpers, you must
open the controller according to the
instructions beginning on page 9.
Opening the Controller
Before performing these actions, touch a grounded object to discharge any electrostatic
charge.
Avoid touching the PCB board directly. Hold the PCB board by its connectors.
1. Turn off the power supply, disconnect, and dismount the controller.
2. The back cover of the controller comprises 4 screws, located in the corners. Remove the screws,
and pull off the back cover.
Changing I/O settings
1. The I/O board of the controller is now exposed, enabling you to change I/O settings according to
the jumpers shown on page 5.
