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Unistream with faulty USB ports how can i upgrade?


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I have a unistream 15" US-156-B10 and i managed to have both usb ports damaged when i was having a usb to serial converter to a printer.

Now that i need to upgrade the panel to the new firmware i am not able to use the usb ports .

What are my options? I tried the SD card but it cannot find the files to proceed with the update


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  • MVP 2023

Please contact support@unitronics.com  with quastion about upgrade via SD.

I do not recommend to repair PLC but qualified electronic engineer can check USB ports power chip MIC2026-1 (output pin 5 and  8 ) and two components on main board.


I found one Unistream PLC with this elements damaged ,  replace it and succesfully repair both USB ports.


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