Samba™ PLC+ HMI
Unitronics
11
Pinouts
The pinouts below show the PLC port signals.
RS232
Pin #
Description
1
Not connected
2
0V reference
3
TXD signal
4
RXD signal
5
0V reference
6
Not connected
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, disconnects, and dismounts 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
The I/O board of the controller is now
exposed, enabling you to change
I/O settings (module dependent) according to
the jumpers setting above.
Note: Photo is for illustration purposes only.
(Using SM70)
Closing the Controller
Replace the back cover of the controller and fasten the corner screws.
Note that you must replace the back cover securely before powering up the controller.
