Buying Guide・2015-01-21

[User Guide] BXB Digital Conference System - Loop Setup Tutorial for Each Series

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In the specifications of BXB conference systems, both the UFO-2000 and FCS-6300 series can already control up to 999 delegate units plus 10 chairman units. However, depending on the size of the conference room and the layout of the seating, the required cable lengths and loop distributions will vary. Considering cable distance and signal loss, calculating the maximum number of units that can be connected to each loop and determining when to use power repeaters or distributors becomes an important topic.

Taking the FCS-6350 main unit as an example, there are four RJ-45 ports on the back of this unit to connect conference microphone units. The main unit can power approximately 40-50 units, but because the power is distributed across four loops, a single loop cannot connect all 40-50 units. Considering the cable distance, the actual number of units that can be loaded varies depending on the distance. The table below shows the relationship between the load quantity and cable length:

The actual wiring method can be calculated according to this table. Generally, it is recommended to use a power repeater whenever there are more than 40 units to avoid insufficient power supply. Adding one repeater allows for the connection of approximately 50 more units, as explained in the example diagram below.

The picture shows a conference room with 5 chairman units and 52 delegate units, with the main control unit placed in the central control room. The distance from the main trunk lines of the four loops to the first microphone is about 10-15 meters, and the microphone units are daisy-chained with 2.5-meter cables. In terms of calculation, the 19 microphone units (14+5) on the first and second loops, plus the 13 microphones on the third loop, are all within the load capacity of the main control unit. However, adding the 12 and 14 units of the last two rows would exceed the main control unit's load. Therefore, a repeater is used here instead of a splitter. The fourth loop is connected to the repeater and then divided into two loops to connect 26 microphone units. We hope this brief explanation with data and diagrams gives everyone a deeper understanding of the loop connection methods for BXB conference systems.