If a loudspeaker is installed correctly, no issues should occur during commissioning. The isolator’s specifications allow for wide tolerances, which is necessary given the potential variations in long cable networks.
However, it is always essential that the isolator is connected correctly, with the proper polarity on both the incoming and outgoing wiring. In practice, it often happens that the positive and negative wires are connected incorrectly during installation, resulting in a fault indication. The system, however, does not specify which isolator is installed incorrectly.
Since the isolators are arranged in a ring structure, the fault can be traced as follows: disconnect one side of the ring and apply audio to the other end of the loop. Then follow the path of the loudspeakers. Good documentation at the start of the project is very important.
If the audio signal disappears at a certain point along the path, the fault is located either on the input side of the relevant isolator, or on the output side of the previous isolator. In this way, the incorrectly connected isolator can be identified and corrected.
