Qualitrol INFORMA PMD-A User Manual page 211

Data acquisition unit
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Appendix F – On-Board LED Functionalities and CPU MMI Modes
In the 1 CPU mode, the CPU must be connected to the first UART port (refer to legend J1
on MMI card).
Figure F.3 – MMI Card – Dip Switch (S1) and First UART Port (J1)
If the CPU is connected to the second UART port (J2 on MMI card), then the connection will
not be detected because the second UART port is not initialized in the 1 CPU mode.
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