One FX3U-ENET-ADP can be connected at the last stage (left end) of adapters for the FX3U series.
*The FX3U-ENET-ADP is a communication special adapter and occupies one communication channel. Therefore, when the FX3U-ENET-ADP is connected to the FX3U series, another expansion board/special adapter (including the FX3U-8AV-BD/FX3U-CF-ADP) can be used.