If the SAI burglar alarm is present, connect the AUX output to your backup unit, and this will service both the BUS and display supply V+-V-. In this case, any eventual power for the 01942 GSM communicator is also taken from the 01801 AUX output (and the BUS output therefore remains unused); if the SAI burglar alarm is present, the BUS that crosses the control unit must be strictly that of the SAI burglar alarm, and for subsequent configuration of home automation devices, at least one line coupler must first be configured in the control unit. If there is no SAI burglar alarm, connect the AUX output of the power supply to terminals V+ V- to supply the monitor, and the BUS output to the BUS. An eventual 01942 GSM communicator is also powered from the AUX. The C and A terminals of the BY me control unit must be strictly left open.
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