Hi,
We in the project used
1x UAC-01RS2
2x UAC-02RS2
3x USP-104B10 with 3x USC-P-B10
BUS connectors are well connected.
All modules work correctly, including COM modules.
Data Tx and Rx in com modules also work.
The only error is that, the power LED on the COM modules does not lighting.
The power LEDs on the I / O modules light up well.
Best regards.