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BUILDING NETWORK ADAPTER BNA-1C/2CS/2DN For each channel the required termination setting can be adjusted individually. At the rear side of the device, a pictogram (Figure 5-2) symbolizes the different possible bus terminations. Figure 5-2 normal XD505 compatible bus termination for C- /S- /FS90-Bus connections It is required to use this switch position for S-Bus and FS90-Bus in any case. For C-Bus connections, this position must be used when at least one XL IRC or XL MC is connected to the C-Bus. XD508 compatible; bus termination disabled XD508 compatible switch position for C-Busses equipped only with XL500 family controllers with bus termination disabled. This switch position must be used if the BNA device is installed in the middle of such a C-Bus. EN1B-0198GE51 R1004B 21